What potential pitfalls or issues can arise when attempting to upload and manipulate images with sizes exceeding the memory_limit in PHP?

When attempting to upload and manipulate images with sizes exceeding the memory_limit in PHP, potential pitfalls can include running out of memory, causing the script to fail or crash. To solve this issue, you can increase the memory_limit in your PHP configuration or implement a solution to handle large images more efficiently, such as resizing the image before processing it.

// Increase memory limit
ini_set('memory_limit', '256M');

// Example code to resize image before processing
$image = imagecreatefromjpeg('large_image.jpg');
$width = imagesx($image);
$height = imagesy($image);
$newWidth = 500;
$newHeight = ($height / $width) * $newWidth;
$newImage = imagecreatetruecolor($newWidth, $newHeight);
imagecopyresampled($newImage, $image, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
imagedestroy($image);

// Now you can process the resized image