Extract video IDs from YouTube and Vimeo embed codes

extract-video-id-from-embed.txt

YouTube embed regex:
/<iframe\s+[^>]*?src="(?:(?:https?:)?\/\/)?(?:(?:www|m)\.)?(?:youtube\.com|youtu.be)(?:\/(?:[\w\-]+\?v=|embed\/|v\/)?)([\w\-]+)[^">]*?"[^>]*>[^<]*<\/iframe>/

Vimeo embed regex:
/<iframe\s+[^>]*?src="(?:(?:https?:)?\/\/)?(?:www\.|player\.)?vimeo.com\/(?:channels\/(?:\w+\/)?|groups\/[^\/]+\/videos\/|album\/\d+\/video\/|video\/|)(\d+)\/?(?:[?]?[^">]*)"[^>]*>[^<]*<\/iframe>/

get-video-placeholder-url.php

<?php

function getVimeoImageUrl($videoId) {
	$ch = curl_init("http://vimeo.com/api/v2/video/" . $videoId . ".json");
	curl_setopt($ch, CURLOPT_ENCODING, "gzip");
	curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
	curl_setopt($ch, CURLOPT_HEADER, 0);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	if (defined('CURLOPT_IPRESOLVE') && defined('CURL_IPRESOLVE_V4')){
		curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
	}
	$response = curl_exec($ch);
	$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
	curl_close($ch);
	if ($httpCode == 200) {
		$json = json_decode($response, true);
		return $json[0]["thumbnail_large"];
	}
	return null;
}

function getYoutubeImageUrl($videoId) {
	return "https://i1.ytimg.com/vi/$videoId/hqdefault.jpg";
}