How can developers optimize the upload process in PHP to minimize server storage usage and improve performance?

To optimize the upload process in PHP and minimize server storage usage, developers can resize images before saving them to the server. This can be achieved by using the PHP GD library to resize images to a smaller size before storing them. By reducing the size of the images, developers can save storage space and improve the performance of the upload process.

// Set the maximum dimensions for the resized image
$maxWidth = 800;
$maxHeight = 600;

// Get the uploaded image file
$uploadedFile = $_FILES['file']['tmp_name'];

// Create a new image from the uploaded file
$image = imagecreatefromstring(file_get_contents($uploadedFile));

// Get the dimensions of the uploaded image
$width = imagesx($image);
$height = imagesy($image);

// Calculate the new dimensions for the resized image
if ($width > $maxWidth || $height > $maxHeight) {
    $ratio = min($maxWidth / $width, $maxHeight / $height);
    $newWidth = $width * $ratio;
    $newHeight = $height * $ratio;
} else {
    $newWidth = $width;
    $newHeight = $height;
}

// Create a new image with the resized dimensions
$newImage = imagecreatetruecolor($newWidth, $newHeight);

// Resize the uploaded image to the new dimensions
imagecopyresampled($newImage, $image, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);

// Save the resized image to the server
imagejpeg($newImage, 'path/to/save/resized_image.jpg');

// Free up memory
imagedestroy($image);
imagedestroy($newImage);