What are the potential issues with using imagegif and imagecreatefromgif in PHP versions prior to 4.3.9?

The potential issues with using imagegif and imagecreatefromgif in PHP versions prior to 4.3.9 are related to memory leaks and potential security vulnerabilities. To solve this problem, you can use the ob_start() and ob_get_clean() functions to buffer the image output before saving it to a file.

ob_start();
imagegif($image);
$gifData = ob_get_clean();
imagedestroy($image);
file_put_contents('output.gif', $gifData);