PHP : Check it remote file exists

remote_file_exists.php

<?php
// E.g. checkRemoteFileExists('https://avatars0.githubusercontent.com/u/3647841?v=3&s=460') == true

function checkRemoteFileExists($url){
  $curl = curl_init($url);

  //don't fetch the actual page, you only want to check the connection is ok
  curl_setopt($curl, CURLOPT_NOBODY, true);

  //do request
  $result = curl_exec($curl);

  $ret = false;

  //if request did not fail
  if ($result !== false) {
      //if request was ok, check response code
      $statusCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);

      if ($statusCode == 200) {
          $ret = true;
      }
  }

  curl_close($curl);

  return $ret;
}

?>