GD Cropping

[rofl90]

I found this and it works but to save server resources, is there any possible way to turn it into a file such as

 

thumb.php and have parameters such as thumb.php?width=100&height=100 and have it output the image instead of just saving it to file.

 

Heres the code:

 

<?php
// Set our crop dimensions.
$width = 100;
$height = 75;
// Get dimensions of existing image
$dimensions = getimagesize('path/to/image');
// Prepare canvas
$canvas = imagecreatetruecolor($width,$height);
$piece = imagecreatefromjpeg('path/to/image');
// Prepare image resizing and crop -- Center crop location
$newwidth = $dimensions[0] / 2;
$newheight = $dimensions[1] / 2;
$cropLeft = ($newwidth/2) - ($width/2);
$cropHeight = ($newheight/2) - ($height/2);
// Generate the cropped image
imagecopyresized($canvas, $piece, 0,0, $cropLeft, $cropHeight, $width, $height, $newwidth, $newheight);
// Write image or fail
if (imagejpeg($canvas,'path/to/save/file',90)) {
echo 'Image crop successful';
} else {
echo 'Image crop failed';
}
// Clean-up
imagedestroy($canvas);
imagedestroy($piece);
?> 

[rofl90]

bump

[tippy_102]

If you want to display the file instead of saving it....

header("Content-type: image/png");
imagepng($canvas);

[rofl90]

I get a barrage of errors...

 

 

Warning: getimagesize(http://www.x.com/uploads/charlie.gif) [function.getimagesize]: failed to open stream: HTTP request failed! HTTP/1.1 401 Authorization Required in /home/x/public_html/thumb.php on line 7

 

Warning: imagecreatefromjpeg(http://www.x.com/uploads/charlie.gif) [function.imagecreatefromjpeg]: failed to open stream: HTTP request failed! HTTP/1.1 401 Authorization Required in /home/x/public_html/thumb.php on line 10

 

Warning: imagecopyresized(): supplied argument is not a valid Image resource in /home/x/public_html/thumb.php on line 17

 

Warning: Cannot modify header information - headers already sent by (output started at /home/charliek/public_html/thumb.php:7) in /home/x/public_html/thumb.php on line 19

‰PNG ��� IHDR���d���d���ÿ€���4IDATxœíÁ ��� ÷Om7 �����������������������������~u”�¨Pò9����IEND®B`‚

[rofl90]

bump/

[tippy_102]

Check that your path is correct for getimagesize -

$dimensions = getimagesize("http://www.x.com/uploads/charlie.gif");

 

If you're using a gif file, you have to use imagecreatefromgif

[obsidian]

Also, check to see that you have the fopen URL wrappers turned on. If not, you won't be able to use getimagesize (or any other like functions) to open the source location via a URL.

[rofl90]

allow_url_fopen On On