php - func_get_args

 

func_get_args (PHP 4, PHP 5) func_get_args --  Returns an array comprising a function's argument list 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。

 1 <?php
 2 function foo() 
 3 {
 4     $numargs = func_num_args();
 5     echo "Number of arguments: $numargs<br />\n";
 6     if ($numargs >= 2) {
 7         echo "Second argument is: " . func_get_arg(1) . "<br />\n";
 8     }
 9     $arg_list = func_get_args();
10     for ($i = 0; $i < $numargs; $i++) {
11         echo "Argument $i is: " . $arg_list[$i] . "<br />\n";
12     }
13 } 
14 
15 foo(1, 2, 3);
16 ?>

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