How can you simplify the file handling process in PHP when checking for specific file extensions?

When handling files in PHP and needing to check for specific file extensions, you can simplify the process by using the `pathinfo()` function to extract the file extension and then compare it to a list of allowed extensions. This approach helps to streamline the code and make it easier to manage.

$allowedExtensions = array('jpg', 'png', 'gif');
$filePath = 'example.jpg';

$extension = pathinfo($filePath, PATHINFO_EXTENSION);

if(in_array($extension, $allowedExtensions)){
    // File extension is allowed, proceed with handling the file
    echo "File extension is allowed.";
} else {
    // File extension is not allowed
    echo "File extension is not allowed.";
}