Create image thumb

thumb.func.php

<?php
/**
 * Create thumbnail from image file.
 * <p>Supported format ".jpg", ".jpeg", ".png", ".gif"</p>
 * @param string $directory
 * Path to source directory
 * @param string $image
 * name of image file including extention
 * @param string $destination
 * path to where thumb image will be saved
 * @author Pilot
 */
function createThumbnail($directory, $image, $destination) {
    if (file_exists($directory.$image)) {
      if (preg_match('/[.]jpg$/', $image) || preg_match('/[.]jpeg$/', $image)) {
        $im = imagecreatefromjpeg($directory . $image);
    } else if (preg_match('/[.]gif$/', $image)) {
        $im = imagecreatefromgif($directory . $image);
    } else if (preg_match('/[.]png$/', $image)) {
        $im = imagecreatefrompng($directory . $image);
    }
    
    $ox = imagesx($im);
    $oy = imagesy($im);
    
    $thumb_width = 161;
    $thumb_height=120;
    
    $ny = floor($oy * ($thumb_width / $ox));
    
    if ($ny<121) {
        $nx = floor($ox*($thumb_height/$oy));
        $nm = imagecreatetruecolor($nx, $thumb_height);
        imagecopyresized($nm, $im, 0, 0, 0, 0, $nx, $thumb_height, $ox, $oy);
    } else {
        $nm = imagecreatetruecolor($thumb_width, $ny);
        imagecopyresized($nm, $im, 0, 0, 0, 0, $thumb_width, $ny, $ox, $oy);
    }    
    
    $image = explode('.', $image);
    imagejpeg($nm, $destination . $image[0].'.'.'jpg', 30);
    
    imagedestroy($nm);
    }
}
?>