Are there specific considerations or adjustments needed for PHP scripts when dealing with images generated from mobile devices or high-resolution images?

When dealing with images generated from mobile devices or high-resolution images in PHP scripts, it's important to consider the file size and dimensions of the images to optimize performance and prevent issues like slow loading times or memory exhaustion. One way to address this is by resizing or compressing the images before processing them in your PHP script.

// Example code snippet to resize and compress images in PHP
function resizeImage($source, $destination, $maxWidth, $maxHeight) {
    list($width, $height) = getimagesize($source);
    $ratio = $width / $height;

    if ($maxWidth / $maxHeight > $ratio) {
        $maxWidth = $maxHeight * $ratio;
    } else {
        $maxHeight = $maxWidth / $ratio;
    }

    $image = imagecreatefromjpeg($source);
    $newImage = imagecreatetruecolor($maxWidth, $maxHeight);
    imagecopyresampled($newImage, $image, 0, 0, 0, 0, $maxWidth, $maxHeight, $width, $height);
    imagejpeg($newImage, $destination, 80);
}