Are there any specific PHP libraries or extensions that are commonly used for image processing?

When working with image processing in PHP, one commonly used library is the GD extension. GD allows you to create and manipulate images using a wide range of functions such as resizing, cropping, rotating, and applying filters. Another popular option is the Imagick extension, which provides more advanced image processing capabilities and supports a wider range of image formats.

// Example code using GD extension to resize an image
$image = imagecreatefromjpeg('input.jpg');
$newWidth = 100;
$newHeight = 100;
$resizedImage = imagecreatetruecolor($newWidth, $newHeight);
imagecopyresampled($resizedImage, $image, 0, 0, 0, 0, $newWidth, $newHeight, imagesx($image), imagesy($image));
imagejpeg($resizedImage, 'output.jpg');
imagedestroy($image);
imagedestroy($resizedImage);