Check remote file size in php using PHP5 and cUrl.

To check file size you need PHP5 and Curl. It first try checking headers. But if file size is not specified in headers, it use cUrl to download the file and checks the size. File is saved in memory temporarily.

echo get_remote_size("");

function get_remote_size($url) {
    $headers = get_headers($url, 1);
    if (isset($headers['Content-Length'])) return $headers['Content-Length'];
    if (isset($headers['Content-length'])) return $headers['Content-length'];

    $c = curl_init();
    curl_setopt_array($c, array(
        CURLOPT_URL => $url,
        CURLOPT_HTTPHEADER => array('User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv: Gecko/20090824 Firefox/3.5.3'),
    return curl_getinfo($c, CURLINFO_SIZE_DOWNLOAD);


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