Get file name of a URL in PHP -

i want file name url. problem it's not ending extension.

for example, http://something.com/1245/65/. on clicking url, pdf file. how store file name of file in variable?

<?php   header('content-type: text/plain');    $curl = curl_init('http://localhost/fakefile.php');    curl_setopt($curl, curlopt_header, true);   curl_setopt($curl, curlopt_returntransfer, true);   curl_setopt($curl, curlopt_customrequest, 'head');    if (($response = curl_exec($curl)) !== false)   {     if (curl_getinfo($curl, curlinfo_http_code) == '200')     {       var_dump($response);        $redispo = '/^content-disposition: .*?filename=(?<f>[^\s]+|\x22[^\x22]+\x22)\x3b?.*$/m';       if (preg_match($redispo, $response, $mdispo))       {         $filename = trim($mdispo['f'],' ";');          echo "filename found: $filename";       }     }   }    curl_close($curl); 

that parse content-disposition line filename=foo.bar information (assuming render file directly out using method.)