upload image and create thumb (jpeg/gif/png)

[Rollo_Tamasi]

I found a script, after much googling, which allows a user to upload an image to a server and the script generates a thumb of the image. The only problem is that it only works for jpgs. I couldn't fnd a script that would allow jpgs/gifs/pngs to be upload and resized. What modifications would i need to do to the following script to get to accept pngs/gifs as well as jpegs?

<?php
  	 if(isset($_POST['Submit']))
  	 {
  	     $size = 150; // the thumbnail height
  	     $filedir = 'image/'; // the directory for the original image
  	     $thumbdir = 'image/'; // the directory for the thumbnail image
  	     $prefix = 'small_'; // the prefix to be added to the original name
  	     $maxfile = '2000000';
 	     $mode = '0666';
  	     $userfile_name = $_FILES['image']['name'];
  	     $userfile_tmp = $_FILES['image']['tmp_name'];
  	     $userfile_size = $_FILES['image']['size'];
  	     $userfile_type = $_FILES['image']['type'];
  	     if (isset($_FILES['image']['name'])) 
  	     {
  	         $prod_img = $filedir.$userfile_name;
  	         $prod_img_thumb = $thumbdir.$prefix.$userfile_name;
  	         move_uploaded_file($userfile_tmp, $prod_img);
  	         chmod ($prod_img, octdec($mode));
  	         $sizes = getimagesize($prod_img);
  	         $aspect_ratio = $sizes[1]/$sizes[0]; 
  	         if ($sizes[1] <= $size)
  	         {
  	             $new_width = $sizes[0];
  	             $new_height = $sizes[1];
  	         }else{
  	             $new_height = $size;
  	             $new_width = abs($new_height/$aspect_ratio);
  	         }
  	         $destimg=ImageCreateTrueColor($new_width,$new_height)
  	             or die('Problem In Creating image');
  	         $srcimg=ImageCreateFromJPEG($prod_img)
  	             or die('Problem In opening Source Image');
  	         ImageCopyResized($destimg,$srcimg,0,0,0,0,$new_width,$new_height,ImageSX($srcimg),ImageSY($srcimg))
  	             or die('Problem In resizing');
  	         ImageJPEG($destimg,$prod_img_thumb,90)
  	             or die('Problem In saving');
  	         imagedestroy($destimg);
  	     }
  	     echo '
  	     <a href="'.$prod_img.'">
  	         <img src="'.$prod_img_thumb.'" width="'.$new_width.'" heigt="'.$new_height.'">
  	     </a>';
  	 }else{
  	     echo '
  	     <form method="POST" action="'.$_SERVER['PHP_SELF'].'" enctype="multipart/form-data">
  	     <input type="file" name="image"><p>
  	     <input type="Submit" name="Submit" value="Submit">
 	     </form>';
 	 }
	 ?>

Thanks

[ClarkF1]

You could use a switch statement with the conditions based on the file extension and then use the GD image library functions for gif and png images.

[Jack_Sparrow]

Hi Rollo,

Look up these functions from your script on [url]www.php.net:[/url]

$srcimg=ImageCreateFromJPEG($prod_img)

and

ImageJPEG($destimg,$prod_img_thumb,90)

These are currently blocking other formats.

The variable $userfile_type on top of the scripts contains the format of the uploaded image. By checking the content of that value you can let the script call functions for .gif and .png images.

Good luck,

Jack

[Rollo_Tamasi]

cheers, will take a look.

[corcode]

You can carry out a basic file type check by looking at the extension, alternatively you can also check the actual contents within the file to make sure it is definitely a gif or jpeg (to prevent someone just renaming a .txt file to .gif) but an extension check should work for most intents and purposes.

The extension check, use explode:

$type=explode(".",$userfilename);

For type check:

$type = $_FILES['image']['type'];

Then run a selection statement to determine what type of image file has been uploaded, and which function you're going to use. (you can add in the other image formats yourself):

if (preg_match("/jpg|jpeg/",$type)){$srcimg=imagecreatefromjpeg($prod_img);}
if (preg_match("/png/",$type)){$srcimg=imagecreatefrompng($prod_img);}

Likewise at the end you need to use the same info to determine which function your gonna use to create the image:

if (preg_match("/png/",$type)){
	imagepng($destimg,$prod_img_thumb);
} else {
	imagejpeg($destimg,$prod_img_thumb);

Of course using and elseif or even a switch statement if you want to include gifs aswell.