PHP - get_defined_functions()

The get_defined_functions() function can return an array of all defined functions.

Syntax

array get_defined_functions([ bool $exclude_disabled = FALSE ] )

The get_defined_functions() function can return multi-dimensional array containing a list of all defined functions, both built-in (internal) and user-defined. The internal functions can be accessible via $arr["internal"], and the user defined ones using $arr["user"].

Example

<?php
   function sample_test_func() {
      return;
   }
   $array = get_defined_functions();
 
    print_r($array);
?>

Output

Array
(
    [internal] => Array
        (
            [0] => zend_version
            [1] => func_num_args
            [2] => func_get_arg
            [3] => func_get_args
            [4] => strlen
            [5] => strcmp
            [6] => strncmp
            ...
            ...
        )
 
    [user] => Array
        (
            [0] => sample_test_func
        )
 
)