Simple image resize/crop php

<?php

class SimpleImage {

   var $image;
   var $image_type;

   function load($filename) {
	  $image_info = getimagesize($filename);
	  $this->image_type = $image_info[2];
	  if( $this->image_type == IMAGETYPE_JPEG ) {
		 $this->image = imagecreatefromjpeg($filename);
	  } elseif( $this->image_type == IMAGETYPE_GIF ) {
		 $this->image = imagecreatefromgif($filename);
	  } elseif( $this->image_type == IMAGETYPE_PNG ) {
		 $this->image = imagecreatefrompng($filename);
	  }
   }
   function save($filename, $image_type=IMAGETYPE_JPEG, $compression=100, $permissions=null) {
	  if( $image_type == IMAGETYPE_JPEG ) {
		 imagejpeg($this->image,$filename,$compression);
	  } elseif( $image_type == IMAGETYPE_GIF ) {
		 imagegif($this->image,$filename);
	  } elseif( $image_type == IMAGETYPE_PNG ) {
		 imagepng($this->image,$filename);
	  }
	  if( $permissions != null) {
		 chmod($filename,$permissions);
	  }
   }
   function output($image_type=IMAGETYPE_JPEG) {
	  if( $image_type == IMAGETYPE_JPEG ) {
		 imagejpeg($this->image);
	  } elseif( $image_type == IMAGETYPE_GIF ) {
		 imagegif($this->image);
	  } elseif( $image_type == IMAGETYPE_PNG ) {
		 imagepng($this->image);
	  }
   }
   function getWidth() {
	  return imagesx($this->image);
   }
   function getHeight() {
	  return imagesy($this->image);
   }
   function resizeToHeight($height) {
	  $ratio = $height / $this->getHeight();
	  $width = $this->getWidth() * $ratio;
	  $this->resize($width,$height);
   }
   function resizeToWidth($width) {
	  $ratio = $width / $this->getWidth();
	  $height = $this->getHeight() * $ratio;
	  $this->resize($width,$height);
   }
   function scale($scale) {
	  $width = $this->getWidth() * $scale/100;
	  $height = $this->getheight() * $scale/100;
	  $this->resize($width,$height);
   }
   function resize($width,$height) {
		$new_image = imagecreatetruecolor($width, $height);
		$bg = imagecolorallocate($new_image,255,255,255);
		imagefill($new_image,0,0,$bg);
		imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
		$this->image = $new_image;
   }
	function crop($filename, $width, $height)
	{
		list($w, $h, $type, $attr) = getimagesize($filename);
		$src_im = imagecreatefromjpeg($filename);

		$src_x = '0';   // begin x
		$src_y = '0';   // begin y
		$src_w = $width; // width
		$src_h = $height; // height
		$dst_x = '0';   // destination x
		$dst_y = '0';   // destination y

		$new_image = imagecreatetruecolor($src_w, $src_h);
		$white = imagecolorallocate($new_image, 255, 255, 255);
		imagefill($new_image, 0, 0, $white);

		imagecopy($new_image, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h);
		$this->image = $new_image;
	}
}

$filename= "test.jpg";

$thumb = new SimpleImage();
$thumb->load($filename);
$thumb->resizeToWidth(190);
$thumb->crop($filename, 190, 190);
$thumb->save("test".$filename);




?>