How does the call_user_func() function play a role in the provided PHP script for resizing images to thumbnails?

The call_user_func() function is used in the provided PHP script to dynamically call a function that resizes images to thumbnails based on the specified image type. This function plays a crucial role in allowing the script to call the appropriate image resizing function without hardcoding each function call. By using call_user_func(), the script gains flexibility and scalability in handling different image types for resizing. 

function resize_image($image_path, $image_type) {
    $function_name = 'resize_' . $image_type;
    
    if(function_exists($function_name)) {
        call_user_func($function_name, $image_path);
    } else {
        echo 'Error: Image type not supported.';
    }
}

function resize_jpg($image_path) {
    // Resize JPG image to thumbnail
    echo 'Resizing JPG image to thumbnail...';
}

function resize_png($image_path) {
    // Resize PNG image to thumbnail
    echo 'Resizing PNG image to thumbnail...';
}

$image_path = 'image.jpg';
$image_type = 'jpg';
resize_image($image_path, $image_type);

Keywords

call_user_func PHP script resizing images thumbnails function

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