Description:
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Even when using PHP with GD on a 64-bit machine, the 4 GB memory limit rears its ugly head.

Thus, we have problems like this one:
https://stackoverflow.com/questions/20614686/gd-warning-product-of-memory-allocation-multiplication-would-exceed-int-max

I would propose going in and updating the integer definitions to accommodate 64-bit processors and its larger memory space, but GD isn't my forte so I'm not sure if I would break all of the things if I went in and patched it.

Test script:
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echo PHP_INT_MAX . '<br/>';
echo 174400 * 249600 . '<br/>';
$img = imagecreatetruecolor(174400, 249600);

Expected result:
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9223372036854775807
43530240000
Warning: imagecreatetruecolor(): gd warning: product of memory allocation multiplication would exceed INT_MAX, failing operation gracefully in /home/bartek/Documents/WWW/WOF/application/controllers/EditorController.php on line 5

Actual result:
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<b>Parse error</b>:  imagecreatetruecolor(): product of memory allocation multiplication would exceed INT_MAX, failing operation gracefully