Thumbnail Generation not working on server - PHP Gallery

Question

This works perfectly fine on localhost but doesn't work on my server, could anyone tell me why? I've got php-gd (php-gd-5.1.6-32.el5.x86_64) on my Centos 5 box.

I have absolutely no idea why it wouldn't be working on the server so, if anyone has any ideas...

Here's the code;

    <?php

if (isset($_GET['img'])){
    // make thumbnail
    if(file_exists($_GET['img'])){
        ignore_user_abort(true);
        set_time_limit(120);
        ini_set('memory_limit', '512M');

        $src_size = getimagesize($_GET['img']);

        if($src_size === false){
            die('Thats not an image!');
        }

        $thumb_width    = 250;
        $thumb_height   = 200;

        if($src_size['mime'] === 'image/jpeg'){
            $src = imagecreatefromjpeg($_GET['img']);
        }else if($src_size['mime'] === 'image/png'){
            $src = imagecreatefrompng($_GET['img']);
        }else if($src_size['mime'] === 'image/gif'){
            $src = imagecreatefromgif($_GET['img']);
        }

        $src_aspect = round(($src_size[0] / $src_size[1]), 1);
        $thumb_aspect = round(($thumb_width / $thumb_height), 1);

        if($src_aspect < $thumb_aspect){
            //higher
            $new_size = array($thumb_width,($thumb_width / $src_size[0]) * $src_size[1]);
            $src_pos = array(0,(($new_size[1] - $thumb_height) * ($src_size[1] / $new_size[1])) / 2);
        }else if ($src_aspect > $thumb_aspect){
            //wider.
            $new_size = array(($thumb_width / $src_size[1]) * $src_size[0],$thumb_height);
            $src_pos = array(($new_size[0] - $thumb_width) / 2, 0);
        }else{
            // same shape
            $new_size = array($thumb_width, $thumb_height);
            $src_pos = array(0, 0);
        }

        if($new_size[0] < 1) $new_size[0] = 1;
        if($new_size[1] < 1) $new_size[0] = 1;

        $thumb = imagecreatetruecolor($thumb_width, $thumb_height);
        imagecopyresampled($thumb, $src, 0, 0, $src_pos[0], $src_pos[1], $new_size[0], $new_size[1], $src_size[0], $src_size[1]);

        if($src_size['mime'] === 'image/jpeg'){
            imagejpeg($thumb, "thumbs/{$_GET['img']}");
        }else if($src_size['mime'] === 'image/png'){
            imagepng($thumb, "thumbs/{$_GET['img']}");
        }else if($src_size['mime'] === 'image/gif'){
            imagegif($thumb, "thumbs/{$_GET['img']}");
        }

        header("Location: thumbs/{$_GET['img']}");
    }   
    die();
}

if (is_dir('./thumbs') === false){
    mkdir('./thumbs', 0744);
}

$images = glob('*.{jpg,jpeg,png,gif}', GLOB_BRACE);

?>
<!DOCTYPE>
<html>
    <head>
        <title></title>
    </head>
    <body>
        <div>
            <?php

            foreach($images as $image){
                if(file_exists("./thumbs/{$image}")){
                    echo "<a href=\"{$image}\" target=\"_blank\"><img style='border: 4px solid black;' src=\"thumbs/{$image}\" alt=\"{$image}\" /></a>";
                }else{
                    echo "<a href=\"{$image}\" target=\"_blank\"><img style='border: 4px solid black;' src=\"?img={$image}\" alt=\"{$image}\" /></a>";
                }
            }

            ?>
        </div>
    </body>
</html>

Can you detail the error you receive when running the script? — ab_dev86, Apr 02 '12 at 11:57

score 0 · Accepted Answer · answered Apr 02 '12 at 11:56

0

Are you sure gd libraries are installed also on the server?

answered Apr 02 '12 at 11:56

ab_dev86

1,952
16
21

I think that it may have been that, I'm looking into it now. – Hugo Apr 02 '12 at 12:01
:) ... so just becuase you are new to stackoverflow... i kindly ask you to accept the answer as the correct one... this will improve my reputation but also your's.. thanks! – ab_dev86 Apr 02 '12 at 12:04

score 0 · Answer 2 · answered Apr 02 '12 at 12:06

According to my knowledge I feel there could be few reasons for this.

GD library is not installed - You can find installation instruction from here. http://www.php.net/manual/en/image.installation.php
It could be a permission issue. You need write permission in particular directory to create thumbnail.
PHP execution not having sufficient memory. You can try with bellow code to set the memory limit manually. Put this at the beginning of the function. ini_set('memory_limit', -1); And reset it at the end of the function before return results. ini_restore('memory_limit');

Thumbnail Generation not working on server - PHP Gallery

2 Answers2