Add emgithub embed to Wordpress

functions.php

<?php

//Add this function to your /wp-content/themes/<yourtheme>/functions.php
//It uses emgithub.com to spawn an embed for your github code on a Wordpress Bloc
//Derived from https://crunchify.com/how-to-embed-and-share-github-gists-on-your-wordpress-blog/
// 2 Mar 2022

/**
 * 
 * Example: https://github.com/EricTurner3/cybersecurity/blob/main/HackTheBox/challenges/forensics/redfailure/decrypt.cs
 * Usage:
 * [gh]https://github.com/EricTurner3/cybersecurity/blob/main/HackTheBox/challenges/forensics/redfailure/decrypt.cs[/gh]
 * [gh url="https://github.com/EricTurner3/cybersecurity/blob/main/HackTheBox/challenges/forensics/redfailure/decrypt.cs" /]
 * 
 * Can also modify other things like themes (see https://emgithub.com/ for full list)
 * [gh style="atom-one-light"]https://github.com/EricTurner3/cybersecurity/blob/main/HackTheBox/challenges/forensics/redfailure/decrypt.cs[/gh]
 */
 
function add_emgithub_shortcode( $atts, $content = NULL ) {
   extract( shortcode_atts( array(
			'url' => '',
			'style' => 'atom-one-light',
			'showBorder' => 'on',
			'showLineNumbers' => 'on',
			'showFileMeta' => 'on',
			'showCopy' => 'on',
			'fetchFromJsDelivr' => 'on',
		), $atts ) );
   
   		return sprintf('<script src="https://emgithub.com/embed.js?target=%s&style=%s&showBorder=%s&showLineNumbers=%s&showFileMeta=%s&showCopy=%s&fetchFromJsDelivr=%s"></script>', 
   			$url ? trim(esc_attr($url)) : trim(esc_attr($content)),
   			$style, $showBorder, $showLineNumbers, $showFileMeta, $showCopy, $fetchFromJsDelivr
   		);
   
}
add_shortcode('gh', 'add_emgithub_shortcode');
?>