How to Using PHP’s get_headers function to get the size of a remote file

//URL of the remote file that you want to get
//the file size of.
$remoteFile = 'http://remote-site.com/video.mp4';

//Get the header response for the file in question.
$headers = get_headers($remoteFile, 1);

//Convert the array keys to lower case for the sake
//of consistency.
$headers = array_change_key_case($headers);

//Set to -1 by default.
$fileSize = -1;

//Check to see if the content-length key actually exists in
//the array before attempting to access it.
if(isset($headers['content-length'])){
    $fileSize = $headers['content-length'];
}

var_dump($fileSize);

 

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