I want to verify if a string value has the name of a built-in function in php. There is some way of know it?
I've used function_exists function but I only to use call_user_func_array in non buit-in functions.
Thanks
You can use get_defined_functions
<?php
$b = get_defined_functions();
in_array('something', $b['internal']); //FALSE
in_array('in_array', $b['internal']); //TRUE
The function function_exists
will return true for both built-in and user-defined, with this code you can check only with built-in functions;