php function that returns width/height/square space & file size of an image

get_image_info.php

function get_image_info($sURL) {
  try {
    $return = array();
    $vData = "";
    $timer = microtime(true);
    $hSock = fopen($sURL, 'rb');
    $length = 10240;
    if ($hSock) {
      while(!feof($hSock)) {
        $vData = fread($hSock, $length);
        break;
      }
      fclose($hSock);

      //get headers
      if(!empty($http_response_header)){
        $headers = array();
        foreach($http_response_header as $line){
          if(($pos = strpos($line, ':')) !== false){
            $headers[strtolower(trim(substr($line, 0, $pos)))] = trim(substr($line, $pos+1));
          }
        }
      }

      if(isset($headers['content-length']) && $headers['content-length']){
          $return['size'] = $headers['content-length'];
      }
      
      if (strpos(' ' . $vData, 'JFIF')>0) {
        $vData = substr($vData, 0, $length);
        $asResult = unpack('H*',$vData);
        $sBytes = $asResult[1];
        $width = 0;
        $height = 0;
        $hex_width = '';
        $hex_height = '';
        if (strstr($sBytes, 'ffc2')) {
          $hex_height = substr($sBytes, strpos($sBytes, 'ffc2') + 10, 4);
          $hex_width = substr($sBytes, strpos($sBytes, 'ffc2') + 14, 4);
        } else {
          $hex_height = substr($sBytes, strpos($sBytes, 'ffc0') + 10, 4);
          $hex_width = substr($sBytes, strpos($sBytes, 'ffc0') + 14, 4);
        }
        $width = hexdec($hex_width);
        $height = hexdec($hex_height);
        $return += array('width' => $width, 'height' => $height);
      } elseif (strpos(' ' . $vData, 'GIF')>0) {
        $vData = substr($vData, 0, $length);
        $asResult = unpack('h*',$vData);
        $sBytes = $asResult[1];
        $sBytesH = substr($sBytes, 16, 4);
        $height = hexdec(strrev($sBytesH));
        $sBytesW = substr($sBytes, 12, 4);
        $width = hexdec(strrev($sBytesW));
        $return += array('width' => $width, 'height' => $height);
      } elseif (strpos(' ' . $vData, 'PNG')>0) {
        $vData = substr($vData, 0, $length);
        $vDataH = substr($vData, 22, 4);
        $asResult = unpack('n',$vDataH);
        $height = $asResult[1];
        $vDataW = substr($vData, 18, 4);
        $asResult = unpack('n',$vDataW);
        $width = $asResult[1];
        $return += array('width' => $width, 'height' => $height);
      }

      if(!empty($return)){
        if($return['width'] > 0 && $return['height'] > 0){
          $return['space'] = $return['width'] * $return['height'];
        }
        $return['time'] = microtime(true)-$timer;
        $return['url'] = $sURL;
        return $return;
      }

    }
  } catch (Exception $e) {}
  return FALSE;
}

get_image_info_test.php

function get_image_info_test($getimagesize = false){
  $files = array(
    'http://www.google.com.eg/images/srpr/logo3w.png',
    'http://pcdn.500px.net/8123858/7051e2440a869a3fec74406a3aa200618452c390/4.jpg',
    'http://farm3.staticflickr.com/2019/2354671896_8216677d61_o.jpg',
    'http://farm1.staticflickr.com/100/306618144_c2810214ee_b.jpg',
    'http://blaberize.com/wp-content/uploads/2009/10/Audio_Jungle_Wallpaper-forest-nature-wallpaper.png',
    'http://spelb.com/wp-content/uploads/2011/10/Nature-Wallpaper.png',
    'http://1.bp.blogspot.com/-OPiIc3qr7fg/T-dFayuobrI/AAAAAAAABg0/0igmpKLJ594/s1600/usfdgv.png',
    'http://2.bp.blogspot.com/_4JfkBwKa0RE/THUyynBYKgI/AAAAAAAAAHg/gNaWW2FNIkc/s1600/1268985622_470x353_natural-green-wallpaper.jpg',
    'http://freeinfonature.files.wordpress.com/2012/07/freewalls.jpg'
  );

  foreach($files as $file){
    $uri = $file;

    echo "=======> $uri <======\n";
    $time = microtime(true);
    echo ">get_image_info: \n";
    $info = get_image_info($uri);
    echo "Width: ". $info['width'] . "px Height: ". $info['height'] . "px in " . (microtime(true)-$time) . " seconds \n";

    if($getimagesize == true){
      $time = microtime(true);
      list($width, $height) = getimagesize($uri);
      echo ">Getimagesize: \n";
      echo "Width: ". $width . "px Height: ". $height . "px in " . (microtime(true)-$time) . " seconds \n";
    }
  }

}