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The function fetches response headers from YouTube's oEmbed URL for a given video and crawls through thenm in order to find whether the video actually exists.
<?php
/**
* Find if a Youtube video exists.
*
* The function fetches response headers from YouTube's oEmbed URL for a given video
* and crawls through thenm in order to find whether the video actually exists.
*
* @link https://imelgrat.me/json-xml/oembed-protocol-embed-videos-news/
*
* @param string $videoID The YouTube video ID to check for
*
* @return bool Returns true if the video exists or false if the video can't be found.
*/
function YouTube_Check_ID($videoID)
{
$is_valid = true;
// YouTube oEmbed API endpoint (https://www.youtube.com/oembed)
// Query it using the video's URL as parameter
// The "format" parameter may be either JSON or XML. Not relevant for this tes.
$theURL = "http://www.youtube.com/oembed?url=http://www.youtube.com/watch?v=$videoID&amp;format=json";
$file_headers = @get_headers($url);
if ($file_headers === false) {
$is_valid = false; // when server not found
} else {
foreach ($file_headers as $header) {
// Parse all headers. Corrects $url when 301/302 redirect(s) lead(s) to 200:
if (preg_match("/^Location: (http.+)$/", $header, $m)) {
$url = $m[1];
}
// Use regex to detect HTTP response codes
if (preg_match("/^HTTP.+\s(\d\d\d)\s/", $header, $m)) {
$code = $m[1];
}
}
// $code 404 This must be a bad video ID.
if ($code == 404) //
{
$is_valid = false;
}
}
return $is_valid;
}
$id = 'BKorP55Aqvg'; //Video id goes here
if (YouTube_Check_ID($id)) {
echo "Yes! The video exists";
} else {
echo "Oh, no! The video code is wrong and it can't be found on YouTube";
}
?>
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