**
* Usage:
* Paste a gist link into a blog post or page and it will be embedded eg:
* https://gist.github.com/2926827
*
* If a gist has multiple files you can select one using a url in the following format:
* https://gist.github.com/2926827?file=embed-gist.php
*/
wp_embed_register_handler( 'gist', '/https:\/\/gist\.github\.com\/(\d+)(\?file=.*)?/i', 'wp_embed_handler_gist' );
function wp_embed_handler_gist( $matches, $attr, $url, $rawattr ) {
$embed = sprintf(
'<script src="https://gist.github.com/%1$s.js%2$s"></script>',
esc_attr($matches[1]),
esc_attr($matches[2])
);
return apply_filters( 'embed_gist', $embed, $matches, $attr, $url, $rawattr );
}