What are the advantages and disadvantages of using existing CMS platforms like Typo3 compared to building a custom CMS in PHP?

Using an existing CMS platform like Typo3 can save time and effort in development, as it already has many features and functionalities built-in. However, it may limit customization options and require learning a new system. Building a custom CMS in PHP allows for complete control over the functionality and design, but it requires more time and resources to develop and maintain.

// Example PHP code for building a custom CMS

<?php
// Your custom CMS code here
?>