How to add new embed handler not supported by oembed?

Question

I am looking to embed videos from websites that do not offer oembed support. I wrote some code but it's not working.

example link:

https://openload.co/f/onU1gT5mkJ8/A_date_with_Lazar_Angelov.mp4

example embed:

<iframe src="https://openload.co/embed/onU1gT5mkJ8/A_date_with_Lazar_Angelov.mp4" scrolling="no" frameborder="0" width="700" height="430" allowfullscreen="true" webkitallowfullscreen="true" mozallowfullscreen="true"></iframe>

my code:

  add_action( 'init', function()
    {
        wp_embed_register_handler( 
            'openload', 
            '#https://www\.openload\.co/f/([a-zA-Z0-9_-]+)/([a-zA-Z0-9_-]+)?#i', 
            'wp_embed_handler_openload' 
        );

    } );

    function wp_embed_handler_openload( $matches, $attr, $url, $rawattr )
    {
        $embed = sprintf(
            '<iframe class="openload-video" src="https://openload.co/embed/([a-zA-Z0-9_-]+)/([a-zA-Z0-9_-]+)" scrolling="no" frameborder="0" width="700" height="430" allowfullscreen="true" webkitallowfullscreen="true" mozallowfullscreen="true">></iframe>',
            esc_attr( $matches[1] ) 
         );

        return apply_filters( 'embed_openload', $embed, $matches, $attr, $url, $rawattr );
    }

I really stucked at this. I would much appreciate any advice or links to any info that can help. Thanks!

Answer 1

Pretty sure it's the fact you're trying to use the regex pattern in your sprintf call, when you should be using... well, a sprintf format:

$embed = sprintf(
    '<iframe class="openload-video" src="https://openload.co/embed/%s" scrolling="no" frameborder="0" width="700" height="430" allowfullscreen="true" webkitallowfullscreen="true" mozallowfullscreen="true">></iframe>',
    esc_attr(
        $matches[1]
    ) 
);

Note that you're not using www in your embed url:

https://openload.co/f/onU1gT5mkJ8/A_date_with_Lazar_Angelov.mp4

as expected in your pattern:

#https://www\.openload\.co/f/([a-zA-Z0-9_-]+)/([a-zA-Z0-9_-]+)?#i