Example of shortcode plugin

README.md

How to install

1. Upload reatlat-shortcode-plugin.php file to the /wp-content/plugins/ directory
2. Activate the plugin through the ‘Plugins’ menu in WordPress
3. Admire your new brand shortcode plugin 😎

How to use

1. Paste the shortcode [bartag foo="Some new Foo variable"] to content editor.
2. Be sure, the shotcode plugin activated.
3. Enjoy result.

reatlat-shortcode-plugin.php

<?php
/*
Plugin Name: reatlat Shortcode plugin
Plugin URI: https://reatlat.net
Description: A Wordpress example shortcode plugin file.
Version: 1.0.0
Author: Alex Zappa
Author URI: https://reatlat.net
License: GPL
License URI: http://www.gnu.org/licenses/gpl-3.0.txt
Copyright: Alex Zappa
Text Domain: reatlat-shortcode-plugin
*/

define('REATLAT_SHORTCODE_PLUGIN_ROOT', plugin_dir_url(__FILE__));

// check if out function exist, not needed if we override some some function
if (function_exists('initReatlatShortcodePluginInit')) {

    function initReatlatShortcodePluginInit()
    {
        function bartag_func($atts)
        {
            $atts = shortcode_atts(array(
                // set default $atts if user use just simple shortcode [bartag]
                'foo' => 'no foo',
                'baz' => 'default baz'
            ), $atts, 'bartag');

            ob_start();

            ?>

            <div class="wrapper">
                <div class="wprapper__inner">
                    <p>Foo => <?php echo $atts['foo']; ?></p>
                    <p>Baz => <?php echo $atts['baz']; ?></p>
                </div>
            </div>

            <?php

            $content = ob_get_contents();

            ob_end_clean();

            return $content;
        }

        add_shortcode('bartag', 'bartag_func');
    }

    initReatlatShortcodePluginInit();
}