How can PHP developers ensure that the fopen url-wrapper is not deactivated when attempting to save an image file from a URL?

To ensure that the fopen url-wrapper is not deactivated when attempting to save an image file from a URL, PHP developers can check the php.ini configuration file to make sure that allow_url_fopen is set to "On". This setting allows PHP to open files and URLs using fopen. If it is set to "Off", the fopen url-wrapper will be deactivated, preventing files from being opened from URLs.

// Check if allow_url_fopen is enabled
if(ini_get('allow_url_fopen')) {
    // Code to save image file from URL
    $url = 'https://example.com/image.jpg';
    $img = file_get_contents($url);
    file_put_contents('saved_image.jpg', $img);
    echo 'Image saved successfully.';
} else {
    echo 'allow_url_fopen is not enabled. Please enable it in php.ini.';
}