Hi,

I came across the resize_image() script from Coppermine (below)and tried it using GD2, it works great!

Only thing is I can only get it to resize a maximum of 2 images at a time, I've tried changing the some variables but still no joy.

I was hoping to use it to resize a list of image stored in a MySQL DB and write them to an images directory, any suggestions??:rolleyes:


<?php
/**
* resize_image()
*
* Create a file containing a resized image
*
* @param $src_file the source file
* @param $dest_file the destination file
* @param $new_size the size of the square within which the new image must fit
* @param $method the method used for image resizing
* @return 'true' in case of success
**/

/**
Variables
**/

include("mainfile.php");

$src_file = "testfile.jpg";
$method = "gd2";
$dest_file = "T_".$src_file."";
$new_size = "150";
$jpeg_qual = "80";
$file_mode = "0644";

resize_image($src_file, $dest_file, $new_size, $method);


// The actual Function to resize images using GD1, & GD2.......
function resize_image($src_file, $dest_file, $new_size, $method) {
global $CONFIG, $method, $file_mode, $jpeg_qual;

$imginfo = getimagesize($src_file);
if ($imginfo == null)
return false;

// GD can only handle JPG & PNG images
if ($imginfo[2] != 2 && $imginfo[2] != 3 && ($method == 'gd1' || $method == 'gd2')){
echo "Invalid filetype";
return false;
}

// height/width
$srcWidth = $imginfo[0];
$srcHeight = $imginfo[1];

$ratio = max($srcWidth, $srcHeight) / $new_size;
$ratio = max($ratio, 1.0);
$destWidth = (int)($srcWidth / $ratio);
$destHeight = (int)($srcHeight / $ratio);

// Method for thumbnails creation
switch ($method) {

case "gd1" :
echo "Converted using GD 1";
if (!function_exists('imagecreatefromjpeg')) {
die("PHP running on your server does not support the GD image library, check with your webhost if they can setup PHP with GD Library.");
}

if ($imginfo[2] == GIS_JPG)
$src_img = imagecreatefromjpeg($src_file);
else
$src_img = imagecreatefrompng($src_file);
if (!$src_img){
echo "invalid_image";
return false;
}
$dst_img = imagecreate($destWidth, $destHeight);
imagecopyresized($dst_img, $src_img, 0, 0, 0, 0, $destWidth, (int)$destHeight, $srcWidth, $srcHeight);
imagejpeg($dst_img, $dest_file, $jpeg_qual);
imagedestroy($src_img);
imagedestroy($dst_img);
break;

case "gd2" :
echo "Converted using GD 2";
if (!function_exists('imagecreatefromjpeg')) {
die("PHP running on your server does not support the GD image library, check with your webhost if ImageMagick is installed");
}
if (!function_exists('imagecreatetruecolor')) {
die("PHP running on your server does not support GD version 2.x, please switch to GD version 1.x on the config page");
}

if ($imginfo[2] == 2)
$src_img = imagecreatefromjpeg($src_file);
else
$src_img = imagecreatefrompng($src_file);
if (!$src_img){
echo "invalid_image";
return false;
}
$dst_img = imagecreatetruecolor($destWidth, $destHeight);
imagecopyresampled($dst_img, $src_img, 0, 0, 0, 0, $destWidth, (int)$destHeight, $srcWidth, $srcHeight);
imagejpeg($dst_img, $dest_file, $jpeg_qual);
imagedestroy($src_img);
imagedestroy($dst_img);
break;
}


// Set mode of uploaded picture
chmod($dest_file, octdec($file_mode));

// We check that the image is valid
$imginfo = getimagesize($dest_file);
if ($imginfo == null){
echo "resize_failed";
@unlink($dest_file);
return false;
} else {
return true;
}
}
?>

You know that'll probably kill your server while your doing that right?

Originally posted by whsox21
You know that'll probably kill your server while your doing that right?

That's correct. Image resizing will eat a lot of server resources. I would recommend ImageMagick for faster inage manipulation.

null

Yeah I know that image resizing would eat server resources but I was only looking to resize a max of 4 images at a time and the coppermine image gallery has a batch upload option which allows for multiple image resize using GD2 and it works fine.

I haven't tried Image Magick, GD works fine for now, Wouldn't image magick eat server resources as well?