如何确定我的内容是否有Instagram嵌入？

Question

The posts in my site has video(single) from anyone of the following embeds.

1. Youtube
2. Facebook
3. Instagram

My question is while fetching them on front end I want to findo out whether my content has an embed, if so which of the following is embedded. (iframe presence checking is one (dirty)way still it own work for instagram)

PHPCODE:

    $video_start = strpos($singlePost->post_content, "<iframe");//Get to the start of the iframe(video)
    $video_stop = strpos($singlePost->post_content, "</iframe>");//Get to the end of the iframe(video)
    $iframe_content = substr($singlePost->post_content, $video_start, $video_stop);
    $xpath = new DOMXPath(@DOMDocument::loadHTML($iframe_content));
    $iframe_src = $xpath->evaluate("string(//iframe/@src)");
    $parsed_url = parse_url($iframe_src);
    $host = $parsed_url['host'];

    if(strpos($host, "youtube") !== false) { // If it is a youtube video append this
        $iframe_src = $iframe_src."?rel=0";// This option has to be appended of youtube URL's
        $related_social_icon = "youtube";
        $related_social_media = "youtube";
    }

<iframe class="<?php echo $iframe_class; ?>" src="<?php echo $iframe_src; ?>" style="background-size: cover;" allowfullscreen></iframe>

Above code works fine for youtube, but does not work for instagram coz when inserting instagram comes as blockquote tags,but if you echo them it will be straight away become iframe tags due to the script in it.

Answer 1

I would go for something like this:

add_filter('the_content', function($content) {
    $identifier = '<embed';
    if (strpos($content, $identifier) !== false) {
        // identifier found
        $content = '<h1>This page includes an embed</h1>'.$content;
    }
    return $content;
});

I'm not sure how your embeds look like, you are talking about iframes to. So you need to find some identifiers that you can check.

Your post probably got downvoted because it could have some more information?