{"id":3088,"date":"2020-05-12T14:19:56","date_gmt":"2020-05-12T14:19:56","guid":{"rendered":"https:\/\/contentlab.com\/building-a-wordpress-plugin-with-amadeus-apis-part-1\/"},"modified":"2021-11-24T21:24:58","modified_gmt":"2021-11-24T21:24:58","slug":"building-a-wordpress-plugin-with-amadeus-apis-part-1","status":"publish","type":"post","link":"https:\/\/contentlab.com\/building-a-wordpress-plugin-with-amadeus-apis-part-1\/","title":{"rendered":"Building a WordPress Plugin with Amadeus APIs: Part 1"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"3088\" class=\"elementor elementor-3088\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1b696ab7 elementor-section-boxed elementor-section-height-default elementor-section-height-default qodef-elementor-content-no\" data-id=\"1b696ab7\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-68467636\" data-id=\"68467636\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-72ff28e elementor-widget elementor-widget-text-editor\" data-id=\"72ff28e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.21.0 - 25-04-2024 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<h2>Introduction<\/h2><p>In the article\u00a0<a href=\"https:\/\/developers.amadeus.com\/blog\/how-to-integrate-amadeus-api-in-php\">How to Integrate Amadeus APIs in PHP<\/a>, we demonstrated how to build a basic flight search feature using the Amadeus\u00a0<a href=\"https:\/\/developers.amadeus.com\/self-service\/category\/air\/api-doc\/flight-offers-search\">Flight Offers Search API<\/a>. In this two-part series, we\u2019ll demonstrate how to integrate this same API into a WordPress plugin.<\/p><p>This series is for PHP and WordPress developers with some prior knowledge and experience developing WordPress plugins. If you have any doubts about WordPress plugin development, visit the\u00a0<a href=\"https:\/\/codex.wordpress.org\/Writing_a_Plugin\">WordPress Codex<\/a>\u00a0for a refresher or clarification. If you\u2019d like to add search and booking capabilities to your WordPress site, the techniques shown in this series will give you a great start toward harnessing the power of Amadeus Self-Service travel APIs.<\/p><p>Part 1 of this series will demonstrate, step-by-step, how to create a simple WordPress plugin, equip it with an admin page where users can configure the API credential settings and give the plugin the ability to communicate with the Flight Offers Search API.<\/p><p>Part 2 will follow up by equipping the plugin with a user interface where users can enter their travel details, giving it the ability to receive input from users and display flight deals received from the Flight Offers Search API in a table.<\/p><p>You can find the source code used in the article on our\u00a0<a href=\"https:\/\/github.com\/amadeus4dev\/amadeus-flight-search-wordpress-plugin\">GitHub repository<\/a>.<\/p><h2>Creating the plugin<\/h2><p>In a nutshell, a WordPress plugin is a PHP file with a WordPress plugin header comment. To create the plugin, first give the plugin a unique name that describes its purpose. In this case, you\u2019ll name it\u00a0<span style=\"font-weight: bolder;\">Amadeus Flight Offers Search<\/span>. Then navigate to the\u00a0<span style=\"font-weight: bolder;\">plugins<\/span>\u00a0directory inside the WordPress\u00a0<em>wp-content<\/em>\u00a0directory and create a new directory. Name it after the plugin \u2014 for example,\u00a0<em>amadeus-flight-offers-search<\/em>.<\/p><p>Create a new PHP file inside the new directory and name it after its directory, something like\u00a0<em>amadeus-flight-offers-search.php<\/em>. This will be the main PHP file for the plugin. WordPress plugins can contain multiple PHP files, but one (and only one) must be the main PHP file, which is the equivalent of\u00a0<em>index.php<\/em>\u00a0or\u00a0<em>index.html<\/em>\u00a0in a web application.<\/p><p>What sets the main PHP file apart from the rest of the PHP files is that the main PHP file starts with a specially formatted PHP block comment-styled plugin header that contains metadata about the plugin, such as its name, author, version, license, and so forth. The plugin header must comply with the\u00a0<a href=\"https:\/\/developer.wordpress.org\/plugins\/plugin-basics\/header-requirements\/\">header requirements<\/a>\u00a0and, at the very least, contain the name of the plugin. For clarity, it\u2019s good practice to name the main PHP file after its directory.<\/p><p>Now add a plugin header to\u00a0<em>amadeus-flight-offers-search.php<\/em>\u00a0as shown here:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-945bb7f elementor-widget elementor-widget-code-highlight\" data-id=\"945bb7f\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp><?php\r\n\/**\r\n * Plugin Name:     Amadeus Flight Offers Search\r\n * Plugin URI:      https:\/\/developers.amadeus.com\r\n * Description:     Connecting to Flight Offers Search API.\r\n * Version:         1.0.0\r\n * Requires PHP:    5.2\r\n * Author:          Amadeus for Developers\r\n * Author URI:      https:\/\/developers.amadeus.com\r\n * License:         GPL v2 or later\r\n * License URI:     https:\/\/www.gnu.org\/licenses\/gpl-2.0.html\r\n *\/\r\n?><\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-428e150 elementor-widget elementor-widget-text-editor\" data-id=\"428e150\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Save the file. You\u2019ve just added a plugin called\u00a0<span style=\"font-weight: bolder;\">Amadeus Flight Offers Search<\/span>\u00a0to your WordPress site. If you head over to the Plugins menu on the main navigation bar of the WordPress administration screen, you should see the newly created\u00a0<span style=\"font-weight: bolder;\">Amadeus Flight Offers Search<\/span>\u00a0plugin, along with some of its metadata from the plugin header in\u00a0<em>amadeus-flight-offers-search.php<\/em>:<\/p><p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-4430\" src=\"https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-1_0.png\" alt=\"\" width=\"798\" height=\"533\" srcset=\"https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-1_0.png 798w, https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-1_0-300x200.png 300w, https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-1_0-768x513.png 768w\" sizes=\"(max-width: 798px) 100vw, 798px\" \/><\/p><p>Now you\u2019ve created a bare-minimum plugin, but it still doesn\u2019t do anything. In the next section, you\u2019ll add an admin page where users can set the credentials required to connect to Amadeus Self-Service APIs.<\/p><h2>Adding the admin page<\/h2><p>To access Amadeus Self-Service APIs, you must request an access token from the Amadeus authorization server using an API key and an API secret. You can provide these values as settings through a page consisting of a form with two text fields for entering the settings and a button for saving them as an option (namely a record) in the\u00a0<a href=\"https:\/\/codex.wordpress.org\/Database_Description#Table:_wp_options\">{$wpdb-&gt;prefix}_options<\/a>\u00a0table of the WordPress database. Your plugin can then retrieve the saved settings for later use. You can include this settings page as a submenu of the Settings menu of the WordPress administration screen and it becomes the admin page for your Amadeus Flight Offers Search plugin.<\/p><p>You\u2019ll create this admin page using a combination of the WordPress\u00a0<a href=\"https:\/\/developer.wordpress.org\/plugins\/settings\/settings-api\/\">Settings API<\/a>\u00a0and the\u00a0<a href=\"https:\/\/developer.wordpress.org\/plugins\/settings\/options-api\/\">Options API<\/a>. The Settings API provides functions to define the composition of settings pages and add them as submenus of the Settings menu, and handles the\u00a0<a href=\"https:\/\/developer.wordpress.org\/apis\/handbook\/settings\/#options-form-rendering\">practical details<\/a>\u00a0of security and page rendering. The Options API offers functions for creating, reading, updating and deleting WordPress options.<\/p><p>To create the admin page for your Amadeus Flight Offers Search plugin, start by adding a new PHP file to your plugin directory called, for example,\u00a0<em>amadeus-api-settings.php<\/em>. In the\u00a0<em>amadeus-api-settings.php<\/em>\u00a0file, add a function called\u00a0<span style=\"font-weight: bolder;\">amadeus_api_settings_init<\/span>:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-152cd51 elementor-widget elementor-widget-code-highlight\" data-id=\"152cd51\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>function amadeus_api_settings_init() {\r\n\t\/\/ to add code here\r\n}<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-232fc35 elementor-widget elementor-widget-text-editor\" data-id=\"232fc35\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>In the\u00a0<span style=\"font-weight: bolder;\">amadeus_api_settings_init<\/span>\u00a0function, add the following code to register a new settings page with a slug name\u2014a unique identifier\u2014called\u00a0<span style=\"font-weight: bolder;\">amadeus_api<\/span>, insert a new row into the\u00a0<span style=\"font-weight: bolder;\">{$wpdb-&gt;prefix}_options<\/span>\u00a0table in the WordPress database, and add\u00a0<span style=\"font-weight: bolder;\">amadeus_api_options<\/span>\u00a0as a value to the option_name field of this new row. Here\u2019s the code to add:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-82b348f elementor-widget elementor-widget-code-highlight\" data-id=\"82b348f\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>register_setting( 'amadeus_api', 'amadeus_api_options' );<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e7fd52f elementor-widget elementor-widget-text-editor\" data-id=\"e7fd52f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Note that\u00a0<span style=\"font-weight: bolder;\">amadeus_api_options<\/span>\u00a0is the unique name given to the option that stores the settings of your Amadeus Flight Offers Search plugin in the\u00a0<span style=\"font-weight: bolder;\">{$wpdb-&gt;prefix}_options<\/span>\u00a0table, and it\u2019s needed to read, update or delete the settings.<\/p><p>Next, in the\u00a0<span style=\"font-weight: bolder;\">amadeus_api_settings_init<\/span>\u00a0function, add the Settings API\u2019s\u00a0<span style=\"font-weight: bolder;\">add_settings_section<\/span>\u00a0function to define a section with a slug name called\u00a0<span style=\"font-weight: bolder;\">amadeus_api_section<\/span>, a section title called\u00a0<span style=\"font-weight: bolder;\">Client Credentials<\/span>, a callback function called\u00a0<span style=\"font-weight: bolder;\">amadeus_api_section_callback<\/span>, and the slug name of the admin page called\u00a0<span style=\"font-weight: bolder;\">amadeus_api<\/span>\u00a0on which to show this section:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3b458b9 elementor-widget elementor-widget-code-highlight\" data-id=\"3b458b9\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>add_settings_section(\r\n\t'amadeus_api_section',\r\n\t'Client Credentials',\r\n\t'amadeus_api_section_callback',\r\n\t'amadeus_api'\r\n  );<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0863419 elementor-widget elementor-widget-text-editor\" data-id=\"0863419\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>In the\u00a0<span style=\"font-weight: bolder;\">amadeus_api_settings_init<\/span>\u00a0function, add the Settings API\u2019s\u00a0<span style=\"font-weight: bolder;\">add_settings_field<\/span>\u00a0function to define a text field for the API key option, with a slug name called\u00a0<span style=\"font-weight: bolder;\">api_key_text_field_0<\/span>, a field label called API Key, a callback function called\u00a0<span style=\"font-weight: bolder;\">api_key_text_field_0_render<\/span>, the slug name of the admin page called\u00a0<span style=\"font-weight: bolder;\">amadeus_api<\/span>\u00a0on which to show the section, and the slug name of the section called\u00a0<span style=\"font-weight: bolder;\">amadeus_api_section<\/span>\u00a0on which to show this text field:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0461084 elementor-widget elementor-widget-code-highlight\" data-id=\"0461084\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>add_settings_field(\r\n\t'api_key_text_field_0',\r\n\t'API Key', \r\n\t'api_key_text_field_0_render',\r\n\t'amadeus_api',\r\n\t'amadeus_api_section'\r\n);<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8ee70e9 elementor-widget elementor-widget-text-editor\" data-id=\"8ee70e9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Similarly, complete the\u00a0<span style=\"font-weight: bolder;\">amadeus_api_settings_init<\/span>\u00a0function with the following code to define another text field for the API secret option:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d088ffe elementor-widget elementor-widget-code-highlight\" data-id=\"d088ffe\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>add_settings_field(\r\n\t'api_secret_text_field_1',\r\n\t'API Secret',\r\n\t'api_secret_text_field_1_render',\r\n\t'amadeus_api',\r\n\t'amadeus_api_section'\r\n);<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8f202c6 elementor-widget elementor-widget-text-editor\" data-id=\"8f202c6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Then create the callback function\u00a0<span style=\"font-weight: bolder;\">amadeus_api_section_callback<\/span>\u00a0required for rendering the\u00a0<span style=\"font-weight: bolder;\">amadeus_api_section<\/span>, which was defined earlier:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c614c00 elementor-widget elementor-widget-code-highlight\" data-id=\"c614c00\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>function amadeus_api_section_callback() {\r\n\techo 'Enter the API key and API secret of your app obtained from Amadeus for Developers portal.', 'amadeus_api';\r\n}<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-356fbe6 elementor-widget elementor-widget-text-editor\" data-id=\"356fbe6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>This\u00a0<span style=\"font-weight: bolder;\">amadeus_api_section_callback<\/span>\u00a0function will simply display an instruction on the admin page.<\/p><p>Now create the callback function\u00a0<span style=\"font-weight: bolder;\">api_key_text_field_0_render<\/span>, which is required for rendering the\u00a0<span style=\"font-weight: bolder;\">api_key_text_field_0<\/span>\u00a0text field that was defined four paragraphs earlier.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9604ceb elementor-widget elementor-widget-code-highlight\" data-id=\"9604ceb\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>function api_key_text_field_0_render() {\r\n\t$options = get_option( 'amadeus_api_options' );\r\n\techo '<input type=\"text\" name=\"amadeus_api_options[api_key_text_field_0]\" value=\"' . $options[ 'api_key_text_field_0' ] . '\">';\r\n}<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-789feb0 elementor-widget elementor-widget-text-editor\" data-id=\"789feb0\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>When called on, this\u00a0<span style=\"font-weight: bolder;\">api_key_text_field_0_render<\/span>\u00a0function will call the Options API\u2019s\u00a0<span style=\"font-weight: bolder;\">get_option<\/span>\u00a0function to retrieve from the\u00a0<span style=\"font-weight: bolder;\">{$wpdb-&gt;prefix}_options<\/span>\u00a0table a row whose\u00a0<span style=\"font-weight: bolder;\">option_name<\/span>\u00a0field contains the value\u00a0<span style=\"font-weight: bolder;\">amadeus_api_options<\/span>. It will get the value stored in the\u00a0<span style=\"font-weight: bolder;\">option_value<\/span>\u00a0field of that row and display it in the\u00a0<span style=\"font-weight: bolder;\">api_key_text_field_0<\/span>\u00a0text field.<\/p><p>Similarly, create another callback function\u00a0<span style=\"font-weight: bolder;\">api_secret_text_field_1_render<\/span>\u00a0required for rendering the\u00a0<span style=\"font-weight: bolder;\">api_secret_text_field_1<\/span>\u00a0text field defined 4 paragraphs ago:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5f181be elementor-widget elementor-widget-code-highlight\" data-id=\"5f181be\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>function api_secret_text_field_1_render() {\r\n\t$options = get_option( 'amadeus_api_options' );\r\n\techo '<;input type=\"text\" name=\"amadeus_api_options[api_secret_text_field_1]\" value=\"' . $options[ 'api_secret_text_field_1' ] . '\">;';\r\n}<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6886a30 elementor-widget elementor-widget-text-editor\" data-id=\"6886a30\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Add the following code to bind the\u00a0<span style=\"font-weight: bolder;\">amadeus_api_settings_init<\/span>\u00a0function to the\u00a0<a style=\"background-color: #ffffff;\" href=\"https:\/\/codex.wordpress.org\/Plugin_API\/Action_Reference\/admin_init\">admin_init<\/a>\u00a0action hook, as follows:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8bd0812 elementor-widget elementor-widget-code-highlight\" data-id=\"8bd0812\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>add_action( 'admin_init', 'amadeus_api_settings_init' );<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-43a8dd4 elementor-widget elementor-widget-text-editor\" data-id=\"43a8dd4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>So far, you\u2019ve registered a settings page and defined the section and fields that go into it. Next, you\u2019ll include this settings page as a submenu in the Settings menu of the WordPress administration screen. In the\u00a0<em>amadeus-api-settings.php<\/em>, create a function called\u00a0<span style=\"font-weight: bolder;\">add_amadeus_api_options_page<\/span>, like so:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2cec436 elementor-widget elementor-widget-code-highlight\" data-id=\"2cec436\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>function add_amadeus_api_options_page() {\r\n\tadd_options_page( 'Amadeus API Settings Page', 'Amadeus API Settings Menu', 'manage_options', 'amadeus_api_menu', 'amadeus_api_options_page' );\r\n}<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fe09ccc elementor-widget elementor-widget-text-editor\" data-id=\"fe09ccc\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>This function will call the WordPress\u00a0<span style=\"font-weight: bolder;\">add_options_page<\/span>\u00a0function to add a submenu called\u00a0<span style=\"font-weight: bolder;\">amadeus_api_menu<\/span>\u00a0to the Settings menu of the WordPress administration screen. The first two arguments give this submenu a page title called\u00a0<span style=\"font-weight: bolder;\">Amadeus API Settings Page<\/span>\u00a0and a menu title called\u00a0<span style=\"font-weight: bolder;\">Amadeus API Settings Menu<\/span>. The third argument,\u00a0<a href=\"https:\/\/wordpress.org\/support\/article\/roles-and-capabilities\/#manage_options\">manage_options<\/a>, specifies the permission required to access this admin page, the fourth argument gives the menu a slug name called\u00a0<span style=\"font-weight: bolder;\">amadeus_api_menu<\/span>, and the last argument specifies a callback function called\u00a0<span style=\"font-weight: bolder;\">amadeus_api_options_page<\/span>. This function will be called to render the admin page when this submenu is selected.<\/p><p>Now create the\u00a0<span style=\"font-weight: bolder;\">amadeus_api_options_page<\/span>\u00a0function that will handle the\u00a0<a href=\"https:\/\/developer.wordpress.org\/apis\/handbook\/settings\/#options-form-rendering\">practical details<\/a>\u00a0of security and page rendering for the admin page, with the following code:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d3d3382 elementor-widget elementor-widget-code-highlight\" data-id=\"d3d3382\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>function amadeus_api_options_page() {\r\n\tif ( ! current_user_can( 'manage_options' ) ) {\r\n\t\twp_die( 'You do not have sufficient permissions to access this page.' );\r\n\t}\r\n ?>\r\n\t<h1><?php echo esc_html( get_admin_page_title() ); ?><\/h1>\r\n\t<form action=\"options.php\" method=\"post\">\r\n\t<?php\r\n\t\/\/ display hidden fields and handle security\r\n\tsettings_fields( 'amadeus_api' );\r\n\t\/\/ output all the sections and fields\r\n\tdo_settings_sections( 'amadeus_api' );\r\n\t\/\/ output a save button\r\n\tsubmit_button( 'Save Settings' );\r\n\t?>\r\n\t<\/form>\r\n<?php\r\n}<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a40e26a elementor-widget elementor-widget-text-editor\" data-id=\"a40e26a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Next, add the following code to bind the\u00a0<span style=\"font-weight: bolder;\">add_amadeus_api_options_page<\/span>\u00a0function to the\u00a0<a style=\"background-color: #ffffff;\" href=\"https:\/\/codex.wordpress.org\/Plugin_API\/Action_Reference\/admin_menu\">admin_menu<\/a>\u00a0action hook:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-89c43d5 elementor-widget elementor-widget-code-highlight\" data-id=\"89c43d5\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>add_action( 'admin_menu', 'add_amadeus_api_options_page' );<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c2eddd2 elementor-widget elementor-widget-text-editor\" data-id=\"c2eddd2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>You\u2019ve written the program to compose the admin page for your Amadeus Flight Offers Search plugin as a submenu in the Settings menu of the WordPress administration screen in the\u00a0<em>amadeus-api-settings.php<\/em>\u00a0file. Now, all you have to do is put it to work. Let\u2019s get started!<\/p><p>First, include the code from the\u00a0<em>amadeus-api-settings.php<\/em>\u00a0file in the main PHP file,\u00a0<em>amadeus-flight-offers-search.php<\/em>, of your Amadeus Flight Offers Search plugin:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9451076 elementor-widget elementor-widget-code-highlight\" data-id=\"9451076\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>require_once( 'amadeus-api-settings.php' );<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-db06895 elementor-widget elementor-widget-text-editor\" data-id=\"db06895\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Then, navigate to the Plugins page of the WordPress administration screen and activate the Amadeus Flight Offers Search plugin. After a successful activation, a submenu titled\u00a0<span style=\"font-weight: bolder;\">Amadeus API Settings Menu<\/span>\u00a0will appear under the Settings menu as shown:<\/p><p><img decoding=\"async\" class=\"alignnone size-full wp-image-4432\" src=\"https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-2.png\" alt=\"\" width=\"798\" height=\"514\" srcset=\"https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-2.png 798w, https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-2-300x193.png 300w, https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-2-768x495.png 768w\" sizes=\"(max-width: 798px) 100vw, 798px\" \/><\/p><p>Go ahead and select the\u00a0<span style=\"font-weight: bolder;\">Amadeus API Settings Menu<\/span>\u00a0submenu to launch the admin page for your Amadeus Flight Offers Search plugin. You\u2019ll see the Amadeus API Settings Page dialog box shown here.<\/p><p><img decoding=\"async\" class=\"alignnone size-full wp-image-4433\" src=\"https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-3.png\" alt=\"\" width=\"798\" height=\"577\" srcset=\"https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-3.png 798w, https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-3-300x217.png 300w, https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-3-768x555.png 768w\" sizes=\"(max-width: 798px) 100vw, 798px\" \/><\/p><p>Voil\u00e0! You now have an admin page to provide the API key and API secret that your Amadeus Flight Offers Search plugin needs to connect to Amadeus Self-Service APIs.<\/p><p>The complete code in\u00a0<em>amadeus-api-settings.php<\/em>\u00a0file should look like this:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3ce62c5 elementor-widget elementor-widget-code-highlight\" data-id=\"3ce62c5\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp><?php\r\nfunction amadeus_api_settings_init() {\r\n  register_setting( 'amadeus_api', 'amadeus_api_options' );\r\n  add_settings_section(\r\n\t  'amadeus_api_section',\r\n\t  'Client Credentials',\r\n\t  'amadeus_api_section_callback',\r\n\t  'amadeus_api'\r\n  );\r\n  add_settings_field(\r\n\t  'api_key_text_field_0',\r\n\t  'API Key',\r\n\t  'api_key_text_field_0_render',\r\n\t  'amadeus_api',\r\n\t  'amadeus_api_section'\r\n  );\r\n  add_settings_field(\r\n\t  'api_secret_text_field_1',\r\n\t  'API Secret',\r\n\t  'api_secret_text_field_1_render',\r\n\t  'amadeus_api',\r\n\t  'amadeus_api_section'\r\n  );\r\n}\r\nfunction amadeus_api_section_callback() {\r\n  echo 'Enter the API key and API secret of your app obtained from Amadeus for Developers portal.', 'amadeus_api';\r\n}\r\nfunction api_key_text_field_0_render() {\r\n  $options = get_option( 'amadeus_api_options' );\r\n  echo '<input type=\"text\" name=\"amadeus_api_options[api_key_text_field_0]\" value=\"' . $options[ 'api_key_text_field_0' ] . '\">';\r\n}\r\nfunction api_secret_text_field_1_render() {\r\n  $options = get_option( 'amadeus_api_options' );\r\n  echo '<input type=\"text\" name=\"amadeus_api_options[api_secret_text_field_1]\" value=\"' . $options[ 'api_secret_text_field_1' ] . '\">';\r\n}\r\nadd_action( 'admin_init', 'amadeus_api_settings_init' );\r\nfunction add_amadeus_api_options_page() {\r\n  add_options_page( 'Amadeus API Settings Page', 'Amadeus API Settings Menu', 'manage_options', 'amadeus_api', 'amadeus_api_options_page' );\r\n}\r\nfunction amadeus_api_options_page() {\r\n  if ( ! current_user_can( 'manage_options' ) ) {\r\n\t  wp_die( 'You do not have sufficient permissions to access this page.' );\r\n  }\r\n?>\r\n<h1><?php echo esc_html( get_admin_page_title( ) ); ?><\/h1>\r\n<form action=\"options.php\" method=\"post\">\r\n<?php\r\nsettings_fields( 'amadeus_api' );\r\ndo_settings_sections( 'amadeus_api' );\r\nsubmit_button( 'Save Settings' );\r\n?>\r\n<\/form>\r\n<?php\r\n}\r\nadd_action( 'admin_menu', 'add_amadeus_api_options_page' );\r\n?><\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e60022f elementor-widget elementor-widget-text-editor\" data-id=\"e60022f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h2>Interacting with the API<\/h2><p>Now, let\u2019s write the code to enable your plugin to interact with the Amadeus Flight Offers Search API and display the response on a WordPress post. In our previous\u00a0<a href=\"https:\/\/developers.amadeus.com\/blog\/how-to-integrate-amadeus-api-in-php\">article on integrating Amadeus APIs in PHP<\/a>, we wrote a PHP script to access and consume the Amadeus Flight Offers Search API. In the name of DRY \u2014Don&#8217;t Repeat Yourself\u2014 you\u2019ll reuse this script for your plugin. However, you have to make some changes to the original script so it can fit the WordPress environment and meet the requirements of your plugin. Let\u2019s go through the original script and make the following changes:<\/p><p>Start by removing the following statement to include the PHP Requests library as modern WordPress sites are already\u00a0<a href=\"https:\/\/developer.wordpress.org\/reference\/classes\/requests\/\">Requests-ready<\/a>:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-805ca48 elementor-widget elementor-widget-code-highlight\" data-id=\"805ca48\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>require_once 'path\/requests\/library\/Requests.php';<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a7a8bcd elementor-widget elementor-widget-text-editor\" data-id=\"a7a8bcd\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Instead of hardcoding the API key and API secret, retrieve them dynamically from the\u00a0<a style=\"background-color: #ffffff;\" href=\"https:\/\/codex.wordpress.org\/Database_Description#Table:_wp_options\">{$wpdb-&gt;prefix}_options<\/a>\u00a0table by calling the Options API\u2019s\u00a0<span style=\"font-weight: bolder;\">get_option function<\/span>\u00a0and passing it an option name called\u00a0<span style=\"font-weight: bolder;\">amadeus_api_option<\/span>\u00a0like this:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-32fab73 elementor-widget elementor-widget-code-highlight\" data-id=\"32fab73\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>\/*\r\n$auth_data = array(\r\n\t'client_id' \t=>  'API Key',\r\n\t'client_secret' =>  'API Secret',\r\n\t'grant_type' \t=> 'client_credentials'\r\n);\r\n*\/\r\n$options = get_option( 'amadeus_api_options' ); \r\n$auth_data = array();\r\n$auth_data[ 'client_id' ] = $options[ 'api_key_text_field_0' ];\r\n$auth_data[ 'client_secret' ] = $options[ 'api_secret_text_field_1' ];\r\n$auth_data[ 'grant_type' ] = 'client_credentials';<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bd6b77d elementor-widget elementor-widget-text-editor\" data-id=\"bd6b77d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Then include an element called\u00a0<span style=\"font-weight: bolder;\">returnDate<\/span>\u00a0in the\u00a0<span style=\"font-weight: bolder;\">$travel_data<\/span>\u00a0array to store the return date, as shown here:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4bd0e05 elementor-widget elementor-widget-code-highlight\" data-id=\"4bd0e05\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>$travel_data = array(\r\n'originLocationCode' \t  => 'SIN',\r\n\t'destinationLocationCode' => 'BKK',\r\n\t'departureDate' \t        => '2020-08-14',\r\n\t'returnDate' \t        => '2020-08-17',\r\n\t'adults'                  => 2\r\n);<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-05e104e elementor-widget elementor-widget-text-editor\" data-id=\"05e104e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Add a timeout option to the\u00a0<span style=\"font-weight: bolder;\">GET<\/span>\u00a0request to manage the timeout issue:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-06b0c23 elementor-widget elementor-widget-code-highlight\" data-id=\"06b0c23\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>$options = array(\r\n\t'timeout' => 10,\r\n);\r\n$requests_response = Requests::get( $url, $headers, $options );<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a3f427d elementor-widget elementor-widget-text-editor\" data-id=\"a3f427d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Then finally, for a trial run, truncate the raw travel data returned by the Amadeus Flight Offers Search API up to the first 5,000 letters:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e57cb38 elementor-widget elementor-widget-code-highlight\" data-id=\"e57cb38\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>echo '<pre>', substr( json_encode($response_body, JSON_PRETTY_PRINT ), 0, 5000 ), <\/pre>';<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-32a09cd elementor-widget elementor-widget-text-editor\" data-id=\"32a09cd\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>That\u2019s all you need to do to amend the original script to fit your plugin. Let\u2019s move the amended script into a function called\u00a0<span style=\"font-weight: bolder;\">get_flight_offers<\/span>\u00a0and save it as\u00a0<em>get-flight-offers.php<\/em>\u00a0inside your plugin\u2019s directory. Once this is done, the\u00a0<em>get-flight-offers.php<\/em>\u00a0file should contain the following code:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fb1a0eb elementor-widget elementor-widget-code-highlight\" data-id=\"fb1a0eb\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>function get_flight_offers() {\r\n  Requests::register_autoloader();\r\n  $url = 'https:\/\/test.api.amadeus.com\/v1\/security\/oauth2\/token';\r\n  $options = get_option( 'amadeus_api_options' ); \r\n  $auth_data = array();\r\n  $auth_data[ 'client_id' ] = $options[ 'api_key_text_field_0' ];\r\n  $auth_data[ 'client_secret' ] = $options[ 'api_secret_text_field_1' ];\r\n  $auth_data[ 'grant_type' ] = 'client_credentials';\r\n  $headers = array( 'Content-Type' => 'application\/x-www-form-urlencoded' );\r\n  try {\r\n\t$requests_response = Requests::post( $url, $headers, $auth_data );\r\n\techo 'Response from the authorization server:';\r\n\t$response_body = json_decode( $requests_response->body );\r\n\techo '<pre>', json_encode($response_body, JSON_PRETTY_PRINT), '<\/pre>';\r\n\tif( property_exists( $response_body, 'error' ) ) die;\r\n\t$access_token = $response_body->access_token;\r\n  } catch (Exception $e) {\r\n\tprint_r( $e->getMessage() );\r\n  }\r\n  if(isset($access_token)){\r\n\t$endpoint = 'https:\/\/test.api.amadeus.com\/v2\/shopping\/flight-offers';\r\n\t$travel_data = array(\r\n\t  'originLocationCode' \t  => 'SIN',\r\n\t  'destinationLocationCode' => 'BKK',\r\n\t  'departureDate' \t      => '2020-08-14',\r\n\t  'returnDate' \t          => '2020-08-17',\r\n\t  'adults'                  => 2\r\n\t);\r\n\t$params = http_build_query( $travel_data );\r\n\t$url = $endpoint.'?'.$params;\r\n\t$headers = array( 'Authorization' => 'Bearer '.$access_token );\r\n\t$options = array(\r\n\t  'timeout' => 10,\r\n\t);\r\n\ttry {\r\n\t  $requests_response = Requests::get( $url, $headers, $options );\r\n\t  echo 'Response from the Flight Offers Search API:';\r\n\t  $response_body = json_decode( $requests_response->body );\r\n\t  echo '&<pre>', substr( json_encode($response_body, JSON_PRETTY_PRINT), 0, 5000 ), '<\/pre>';\r\n\t  if(property_exists( $response_body, 'error' ) ) die;\r\n\t} catch ( Exception $e ) {\r\n\t   print_r( $e->getMessage() );\r\n\t}\r\n  }\r\n}<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8120d3a elementor-widget elementor-widget-text-editor\" data-id=\"8120d3a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>You created a function called\u00a0<span style=\"font-weight: bolder;\">get_flight_offers<\/span>\u00a0with the capability to interact with the Amadeus Flight Search API in the\u00a0<em>get-flight-offers.php<\/em>\u00a0file. Next, you have to integrate this function into your Amadeus Flight Offers Search plugin so your plugin can interact with the Amadeus Flight Offers Search API. As a trial run, you\u2019ll get the plugin to output part of the response from the Amadeus Flight Offers Search API to a WordPress post.<\/p><p>To accomplish this, you need to perform several steps in the main PHP file,\u00a0<em>amadeus-flight-offers-search.php<\/em>. Start by including the file:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-914ee52 elementor-widget elementor-widget-code-highlight\" data-id=\"914ee52\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>require_once( 'get-flight-offers.php' );<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2e801ce elementor-widget elementor-widget-text-editor\" data-id=\"2e801ce\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Then add the\u00a0<a style=\"background-color: #ffffff;\" href=\"https:\/\/codex.wordpress.org\/Shortcode_API\">Shortcode API<\/a>\u2019s\u00a0<span style=\"font-weight: bolder;\">add_shortcode<\/span>\u00a0function to create a\u00a0<a style=\"background-color: #ffffff;\" href=\"https:\/\/developer.wordpress.org\/plugins\/shortcodes\/\">shortcode<\/a>\u00a0with a shortcode tag called\u00a0<span style=\"font-weight: bolder;\">amadeus-flight-offers-search<\/span>\u00a0and a callback function called\u00a0<span style=\"font-weight: bolder;\">amadeus_flight_offers_search_shortcode<\/span>. This will add the get_flight_offers function to any posts or pages on which this shortcode is found:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d3e28d8 elementor-widget elementor-widget-code-highlight\" data-id=\"d3e28d8\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp>function amadeus_flight_offers_search_shortcode() {  \r\n    get_flight_offers();\r\n}\r\nadd_shortcode( 'amadeus-flight-offers-search', 'amadeus_flight_offers_search_shortcode' );<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7f463ba elementor-widget elementor-widget-text-editor\" data-id=\"7f463ba\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>To add the\u00a0<span style=\"font-weight: bolder;\">get_flight_offers<\/span>\u00a0function to a WordPress post or page, simply add the shortcode tag of the shortcode\u2014<span style=\"font-weight: bolder;\">amadeus-flight-offers-search<\/span>\u2014in a pair of square brackets to the post or page, for example:<\/p><p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4434\" src=\"https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-4.png\" alt=\"\" width=\"798\" height=\"536\" srcset=\"https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-4.png 798w, https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-4-300x202.png 300w, https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress-4-768x516.png 768w\" sizes=\"(max-width: 798px) 100vw, 798px\" \/><\/p><p>Launch a WordPress post that has this tag [amadeus-flight-offers-search] added and you\u2019ll see that the post displays a response from the API that looks something like this:<\/p><p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4435\" src=\"https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress5-1.png\" alt=\"\" width=\"798\" height=\"973\" srcset=\"https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress5-1.png 798w, https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress5-1-246x300.png 246w, https:\/\/contentlab.com\/wp-content\/uploads\/2020\/05\/Wordpress5-1-768x936.png 768w\" sizes=\"(max-width: 798px) 100vw, 798px\" \/><\/p><p>At this point, the\u00a0<em>amadeus-flight-offers-search.php<\/em>\u00a0file should contain the following code:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a70f8ca elementor-widget elementor-widget-code-highlight\" data-id=\"a70f8ca\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"prismjs-default copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-php line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-php\">\n\t\t\t\t\t<xmp><?php\r\n\/**\r\n * Plugin Name:     Amadeus Flight Offers Search\r\n * Plugin URI:      https:\/\/developers.amadeus.com\r\n * Description:     Connecting to Flight Offers Search API.\r\n * Version:         1.0.0\r\n * Requires PHP:    5.2\r\n * Author:          Amadeus for Developers\r\n * Author URI:      https:\/\/developers.amadeus.com\r\n * License:         GPL v2 or later\r\n * License URI:     https:\/\/www.gnu.org\/licenses\/gpl-2.0.html\r\n *\/\r\nrequire_once( 'amadeus-api-settings.php' );\r\nrequire_once( 'get-flight-offers.php' );\r\nfunction amadeus_flight_offers_search_shortcode() {\r\n    get_flight_offers();\r\n}\r\nadd_shortcode( 'amadeus-flight-offers-search', 'amadeus_flight_offers_search_shortcode' );\r\n?><\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7259e67f elementor-widget elementor-widget-text-editor\" data-id=\"7259e67f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h2><span style=\"font-size: 2rem;\">Intermission<\/span><br><\/h2>\n<p>We\u2019ve arrived at the end of Part 1. So far, you\u2019ve created a simple WordPress plugin called Amadeus Flight Offers Search, equipped it with an admin page where users can configure their credential settings as required to connect to Amadeus Self-Service APIs, and given the plugin the ability to communicate with the Flight Offers Search API, which proved successful in a trial run.<\/p>\n<p>In <a href=\"https:\/\/developers.amadeus.com\/blog\/build-wordpress-plugin-amadeus-api-part-2\">Part 2 of this series<\/a>, you\u2019ll further enhance the plugin by adding a user interface that lets users enter their travel details, giving it the ability to receive input from users and output flight deals received from the Flight Offers Search API in a table.<\/p>\n<p><em>This article was first published on <a href=\"https:\/\/developers.amadeus.com\/blog\/build-wordpress-plugin-amadeus-api\">Amadeus&#8217;s blog<\/a><\/em>.<\/p>\n<p><em><span class=\"TextRun SCXW156001673 BCX2\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW156001673 BCX2\">If you\u2019re interested in developing expert technical content that performs, <\/span><\/span><a class=\"Hyperlink SCXW156001673 BCX2\" href=\"https:\/\/contentlab.com\/contact\/\" target=\"_blank\" rel=\"noreferrer noopener\"><span class=\"TextRun Underlined SCXW156001673 BCX2\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW156001673 BCX2\" data-ccp-charstyle=\"Hyperlink\">let\u2019s have a conversation<\/span><\/span><\/a><span class=\"TextRun SCXW156001673 BCX2\" lang=\"EN-US\" xml:lang=\"EN-US\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW156001673 BCX2\"> today.<\/span><\/span><\/em><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>This article will demonstrate, step-by-step, how to create a simple WordPress plugin, equip it with an admin page where users can configure the API credential settings and give the plugin the ability to communicate with the Flight Offers Search API.<\/p>\n","protected":false},"author":3,"featured_media":4874,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[278,18,240],"tags":[294,309],"hashtags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Building a WordPress Plugin with Amadeus APIs: Part 1 &#183; 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