PHP Reference

func_num_args

(PHP 4 , PHP 5)

func_num_args -- Returns the number of arguments passed to the function

Description

int func_num_args ( void )

Returns the number of arguments passed into the current user-defined function. func_num_args() will generate a warning if called from outside of a user-defined function.


<?php

function foo() 

{

    $numargs = func_num_args();

    echo "Number of arguments: $numargs\n";

} 



foo(1, 2, 3);    // Prints 'Number of arguments: 3'

?>

func_num_args() may be used in conjunction with func_get_arg() and func_get_args() to allow user-defined functions to accept variable-length argument lists.