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Miscellaneous Functions Library: Func_num_args

Source: Internet
Author: User
Keywords func_num_args php Chinese function manual miscellaneous function library
Tags aliyun consumer function function library functions html http php
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Func_num_args

(PHP4 >= 4.0b4)

Func_num_args---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Returns the number of arguments passed to a function

Syntax: int Func_num_args (void)

Description:

Returns the number of parameters passed to the current consumer-defined function. If you call this function from outside the function definition, func_get_arg () will produce a warning.

Example:

<?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 () can be used to combine Func_get_arg () and Func_get_args () to allow a user-defined function to accept a variable-length parameter list.

Note: This function is a new function in PHP4

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