How to get the function name inside a function in PHP ?

To get the function name inside the PHP function we need to use Magic constants(__FUNCTION__).

Magic constants: Magic constants are the predefined constants in PHP which is used on the basis of their use. These constants are starts and end with a double underscore (__). These constants are created by various extensions.

Syntax:

$string = __FUNCTION__

Description: This constant is used to return the function name, or {closure} for anonymous functions.

Program 1: PHP program to print function name inside the function GeeksforGeeks().

<?php

function GeeksforGeeks() {

    // Magic function constant which
    // holds the function name, or
    // {closure} for anonymous functions
    $string = __FUNCTION__;

    // Display the result
    echo $string;
}

// Function call
GeeksforGeeks();

?>

Output:

GeeksforGeeks

Program 2: PHP program to print the function name inside the function Geeks().

<?php

function Geeks() {

    // Magic function constant which
    // holds the class method name
    $string = __METHOD__;

    // Display the result
    echo $string;
}

// Function call
Geeks();

?>

Output:

Geeks

Reference: https://www.php.net/manual/en/language.constants.predefined.php