Resizer on PHP

Resizer function PHP

public static function Crop($source_image, $destination, $tn_w = 300, $tn_h =220, $quality = 100, $wmsource = false) {
	  #find out what type of image this is
	  $info = getimagesize($source_image);
	  $imgtype = image_type_to_mime_type($info[2]);
	 
	  #assuming the mime type is correct
	  switch ($imgtype) {
	    case 'image/jpeg':
	    $source = imagecreatefromjpeg($source_image);
	    break;
	    case 'image/gif':
	    $source = imagecreatefromgif($source_image);
	    break;
	    case 'image/png':
	    $source = imagecreatefrompng($source_image);
	    break;
	    default:
	    die('Invalid image type.');
	  }
	 
	  #Figure out the dimensions of the image and the dimensions of the desired thumbnail
	  $src_w = imagesx($source);
	  $src_h = imagesy($source);
	  $src_ratio = $src_w/$src_h;
	  #Do some math to figure out which way we'll need to crop the image
	  #to get it proportional to the new size, then crop or adjust as needed
	  if ($tn_w/$tn_h > $src_ratio) {
	    $new_h = $tn_w/$src_ratio;
	    $new_w = $tn_w;
	  } else {
	    $new_w = $tn_h*$src_ratio;
	    $new_h = $tn_h;
	  }
	  $x_mid = $new_w/2;
	  $y_mid = $new_h/2;
	  $newpic = imagecreatetruecolor(round($new_w), round($new_h));
	  imagecopyresampled($newpic, $source, 0, 0, 0, 0, $new_w, $new_h, $src_w, $src_h);
	  $final = imagecreatetruecolor($tn_w, $tn_h);
	  imagecopyresampled($final, $newpic, 0, 0, ($x_mid-($tn_w/2)), ($y_mid-($tn_h/2)), $tn_w, $tn_h, $tn_w, $tn_h);
	 
	  #if we need to add a watermark
	  if($wmsource) {
	    #find out what type of image the watermark is
	    $info = getimagesize($wmsource);
	    $imgtype = image_type_to_mime_type($info[2]);
	 
	    #assuming the mime type is correct
	    switch ($imgtype) {
	      case 'image/jpeg':
	      $watermark = imagecreatefromjpeg($wmsource);
	      break;
	      case 'image/gif':
	      $watermark = imagecreatefromgif($wmsource);
	      break;
	      case 'image/png':
	      $watermark = imagecreatefrompng($wmsource);
	      break;
	      default:
	      die('Invalid watermark type.');
	    }
	 
	    #if we're adding a watermark, figure out the size of the watermark
	    #and then place the watermark image on the bottom right of the image
	    $wm_w = imagesx($watermark);
	    $wm_h = imagesy($watermark);
	    imagecopy($final, $watermark, $tn_w - $wm_w, $tn_h - $wm_h, 0, 0, $tn_w, $tn_h);
	  }
	  if(Imagejpeg($final,$destination,$quality)) {
	    return true;
	  }
	  return false;
	}

	public static function CropAll($path = 'public/file/img')
	{
		$filetypes = array('jpg','png');

		//Iterator for recursive scan
		$di = new RecursiveDirectoryIterator($path);
		foreach (new RecursiveIteratorIterator($di) as $filename => $file) 
		{
    		$pathinfo = pathinfo($file);
	    	// get the extension
	        $extension = $pathinfo['extension'];
	        // proceed only if it matches with the extension we provide
			if(basename(dirname($file))!='small' && basename(dirname($file))!='thumb' && basename(dirname($file))!='medium')
			{
		        if(dirname($file)!='small' && dirname($file)!='thumb' && dirname($file)!='medium')
		        {
			        if(strcasecmp($filetypes[0],$extension) == 0 || strcasecmp($filetypes[1],$extension) == 0)
			        {

			        	$current_name = $pathinfo['filename'];
			        	$destination = dirname($file).DS.'thumb'.DS.substr($current_name, 0,-6).'.'.$extension;
			        	$thumb_path = dirname($file).DS.'thumb';
			        	if(is_dir($thumb_path) ==false){
			        		mkdir($thumb_path);
			        	}
			        	static::Crop($file,$destination,$tn_w = 300,$tn_h =200,$quality = 100,$wmsource = false);
			        	echo $destination;
			        	echo "$file resized to $destination";
			        	echo '</br>';
			        }
		        }
	        }
		}
	}