PHP call_user_func: Purpose Usage

The purpose of the call_user_func function is to invoke user-defined functions or methods. Users can dynamically call a function or method using the call_user_func function without needing to know the specific function or method names in advance. This is particularly useful in situations where functions or methods need to be called dynamically, such as in callback functions, or when calling different functions based on user input. The syntax for calling is as follows:

call_user_func(callable $callback [, $parameter [, ...]])

In this case, $callback is the function or method to be called, and $parameter is an optional argument that can be passed to the called function or method.