Simple Image Resize Class

FILE 1 : index.php

<html>
<body>
<form action="upload.php" enctype="multipart/form-data" method="post">
<input name="file" size="35" type="file"/>
<input name="submit" type="submit" value="Upload"/>
</form>

</body>
</html>


FILE 2 : upload.php

<?php

require_once "upload.class.php";
if(isset($_FILES['file'])) {
$uploader = new uploader($_FILES['file']);
$uploader->upload();

$ok = $uploader->getInfo();

if(!empty($ok))
{
$photo = $uploader->dir . $uploader->file['name'];
echo $uploader->getInfo();
echo "<br/>";
}
else
{
echo $uploader->getError();
echo "<br/>";
}
}
?>


FILE 3 : upload.class.php

<?php
class uploader{

 private $type = array("jpg","jpeg","gif","png"),$width = 240,$height = 240,$info = '',$error='';

 function __construct($file,$dir="./"){
 $this->file = $file;
 $this->dir = $dir;
 }

 /**
 * Resize and upload an image.
 * @return String fileName or False on error
 */
 public function upload(){
 $ext = explode(".",$this->file['name']);
 $ext = strtolower(end($ext));

 if(file_exists($this->dir.$this->file['name'])){
 $this->error .= '<b>Error: file already exists.</b>';
 return false;
 }
 if (!in_array($ext,$this->type)){
 $this->error .= '<b>Error: file format not supported.</b>';
 return false;
 }

 // Get image size
 list($imwidth,$imheight) = getimagesize($this->file['tmp_name']);

 $hx = (100 / ($imwidth / $this->width)) * .01;
 $hx = round ($imheight * $hx);

 if ($hx < $this->height) {
 $this->height = (100 / ($imwidth / $this->width)) * .01;
 $this->height = round ($imheight * $this->height);
 } else {
 $this->width = (100 / ($imheight / $this->height)) * .01;
 $this->width = round ($imwidth * $this->width);
 }

 // Create a new true color image
 $image = imagecreatetruecolor($this->width, $this->height);

 // Create a new image from file
 if($ext == "jpg" || $ext == "jpeg") {
 $im = imagecreatefromjpeg ($this->file['tmp_name']);
 } else if($ext == "gif") {
 $im = imagecreatefromgif ($this->file['tmp_name']);
 } else if($ext == "png") {
 $im = imagecreatefrompng ($this->file['tmp_name']);
 }

 // Copy and resize part of an image with resampling
 if(imagecopyresampled($image, $im, 0, 0, 0, 0, $this->width, $this->height, $imwidth, $imheight)){
 $this->info .= '<b>Image Uploaded Successfully!</b>';
 }

 // Output image
 if($ext == "jpg" || $ext == "jpeg") {
 imagejpeg($image, $this->dir.$this->file['name'], 100);
 } else if($ext == "gif") {
 imagegif ($image, $this->dir.$this->file['name']);
 } else if($ext == "png") {
 imagepng ($image, $this->dir.$this->file['name'], 0);
 }

 // Destroy an image
 imagedestroy($im);
 return $im;

 }

 /**
 * Get uploading information.
 */
 public function getInfo(){
 return $this->info;
 }

 /**
 * Get uploading error.
 */
 public function getError(){
 return $this->error;
 }

}
?>