PHP is not that secure because of its open-source, as the source code can be easily available.
PHP is not suitable for large content-based web applications.
PHP has a weak type, which may lead to incorrect data and information to the user.
PHP frameworks need to learn to use the PHP built-in functionalities to avoid writing additional code.
PHP do not allow the change or modification in core behavior of the web applications.
PHP frameworks are not the same in behavior so does their performance and features.
Using more features of PHP framework and tools lead to poor performance of the web applications.