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# func_num_args

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 function definition.

      1
      2 <?php
      3 function foo() {
      4     $numargs = func_num_args();
      5     echo "Number of arguments: $numargs\n";
      6 }
      7
      8 foo (1, 2, 3);  // Prints 'Number of arguments: 3'
      9 ?>
     10

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.

> Note: This function was added in PHP 4.

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