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

Description

int func_num_args ( void )

Gets the number of arguments passed to the function.

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

Return Values

Returns the number of arguments passed into the current user-defined function.

ChangeLog

Version	Description
5.3.0	This function can now be used in parameter lists.

Errors/Exceptions

Generates a warning if called from outside of a user-defined function.

Examples

Example #1 func_num_args() example


<?php
function foo()
{
    $numargs = func_num_args();
    echo "Number of arguments: $numargs\n";
}

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

Notes

Note: Because this function depends on the current scope to determine parameter details, it cannot be used as a function parameter. If this value must be passed, the results should be assigned to a variable, and that variable should be passed.