func_get

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Description

array func_get_args ( void )

Returns an array in which each element is a copy of the corresponding member of the current user-defined function's argument list. func_get_args() will generate a warning if called from outside of a function definition. This function cannot be used directly as a function parameter. Instead, its result may be assigned to a variable, which can then be passed to the function.

注: This function returns a copy of the passed arguments only, and does not account for default (non-passed) arguments.

注: 因为本函数依赖于当前域来决定参数细节，因此不能用作函数参数。如果必须要传递这个值，将结果赋给一个变量，然后传递该变量。




<?php



function 

foo

() 

{

    

$numargs 

= 

func_num_args

();

    echo 

"Number of arguments: $numargs<br />

\n

"

;

    if (

$numargs 

>= 

2

) {

        echo 

"Second argument is: " 

. 

func_get_arg

(

1

) . 

"<br />\n"

;

    }

    

$arg_list 

= 

func_get_args

();

    for (

$i 

= 

0

; 

$i 

< 

$numargs

; 

$i

++) {

        echo 

"Argument $i is: " 

. 

$arg_list

[

$i

] . 

"<br />\n"

;

    }

} 





foo

(

1

, 

2

, 

3

);



?>

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