title: Resizing images using php
body: <p>I'm using a neat little php script to resize my images to fit in a 300x300 pixel square, while keeping the aspect ratio. I got the script from <a href="http://www.white-hat-web-design.co.uk/blog/resizing-images-with-php/" rel="noreferrer">here</a>.</p>
  
  <p>Here is the whole script:</p>
  
  <pre><code>&lt;?php
  
  /*
  * File: SimpleImage.php
  * Author: Simon Jarvis
  * Copyright: 2006 Simon Jarvis
  * Date: 08/11/06
  * Link: http://www.white-hat-web-design.co.uk/articles/php-image-resizing.php
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version 2
  * of the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU General Public License for more details:
  * http://www.gnu.org/licenses/gpl.html
  *
  */
  
  class SimpleImage {
  
     var $image;
     var $image_type;
  
     function load($filename) {
  
        $image_info = getimagesize($filename);
        $this-&gt;image_type = $image_info[2];
        if( $this-&gt;image_type == IMAGETYPE_JPEG ) {
  
           $this-&gt;image = imagecreatefromjpeg($filename);
        } elseif( $this-&gt;image_type == IMAGETYPE_GIF ) {
  
           $this-&gt;image = imagecreatefromgif($filename);
        } elseif( $this-&gt;image_type == IMAGETYPE_PNG ) {
  
           $this-&gt;image = imagecreatefrompng($filename);
        }
     }
     function save($filename, $image_type=IMAGETYPE_JPEG, $compression=75, $permissions=null) {
  
        if( $image_type == IMAGETYPE_JPEG ) {
           imagejpeg($this-&gt;image,$filename,$compression);
        } elseif( $image_type == IMAGETYPE_GIF ) {
  
           imagegif($this-&gt;image,$filename);
        } elseif( $image_type == IMAGETYPE_PNG ) {
  
           imagepng($this-&gt;image,$filename);
        }
        if( $permissions != null) {
  
           chmod($filename,$permissions);
        }
     }
     function output($image_type=IMAGETYPE_JPEG) {
  
        if( $image_type == IMAGETYPE_JPEG ) {
           imagejpeg($this-&gt;image);
        } elseif( $image_type == IMAGETYPE_GIF ) {
  
           imagegif($this-&gt;image);
        } elseif( $image_type == IMAGETYPE_PNG ) {
  
           imagepng($this-&gt;image);
        }
     }
     function getWidth() {
  
        return imagesx($this-&gt;image);
     }
     function getHeight() {
  
        return imagesy($this-&gt;image);
     }
     function resizeToHeight($height) {
  
        $ratio = $height / $this-&gt;getHeight();
        $width = $this-&gt;getWidth() * $ratio;
        $this-&gt;resize($width,$height);
     }
  
     function resizeToWidth($width) {
        $ratio = $width / $this-&gt;getWidth();
        $height = $this-&gt;getheight() * $ratio;
        $this-&gt;resize($width,$height);
     }
  
     function scale($scale) {
        $width = $this-&gt;getWidth() * $scale/100;
        $height = $this-&gt;getheight() * $scale/100;
        $this-&gt;resize($width,$height);
     }
  
     function resize($width,$height) {
        $new_image = imagecreatetruecolor($width, $height);
        imagecopyresampled($new_image, $this-&gt;image, 0, 0, 0, 0, $width, $height, $this-&gt;getWidth(), $this-&gt;getHeight());
        $this-&gt;image = $new_image;
     }      
  
  }
  ?&gt;
  </code></pre>
  
  <p>and here's how I'm using it:</p>
  
  <pre><code>    $image = new SimpleImage();
      $image-&gt;load($_FILES['uploaded_image']['tmp_name']);
      $image-&gt;resizeToWidth(300);
      $image-&gt;resizeToHeight(300);
      $image-&gt;save('./images/photo'.$id.'.jpg');
      header("Location: people.php");
      exit;
  </code></pre>
  
  <p><strong>And here's my problem:</strong>
  It only resizes the height. So if I gave it a 1200x990 (width x height) image, it spits out a 
  400x300 (if that makes sense), which is does not fit within my 300x300 square.</p>
  
  <p>I also tried:</p>
  
  <pre><code>    $image = new SimpleImage();
      $image2 = new SimpleImage();
      $image-&gt;load($_FILES['uploaded_image']['tmp_name']);
      $image-&gt;resizeToWidth(300);
      $image-&gt;save('temp.jpg');
      $image2-&gt;load('temp.jpg');
      $image2-&gt;resizeToHeight(300);
      $image2-&gt;save('./images/photo'.$id.'.jpg');
      unlink('temp.jpg');
      header("Location: people.php");
      exit;
  </code></pre>
  
  <p>Sorry for the horrid mass of code, I thought I had better include the source just in case the place where I got it from moves or shuts down.</p>
  
  <p>Any godly coders out there?</p>