What are the advantages and disadvantages of using pre-built PHP modules or classes for string manipulation tasks?

When working on string manipulation tasks in PHP, using pre-built modules or classes can save time and effort by providing ready-made solutions for common string operations. However, relying on external modules may introduce dependencies and potential compatibility issues with future PHP versions. It's important to carefully evaluate the trade-offs between convenience and maintainability when choosing to use pre-built PHP modules for string manipulation tasks.

// Example of using a pre-built PHP module (mb_strtoupper) for string manipulation
$string = "hello world";
$upperCaseString = mb_strtoupper($string);
echo $upperCaseString;