<?php
function foo()
{
$numargs = func_num_args();//返回给函数传递的参数个数
echo "Number of arguments: $numargs ";
}
foo(1, 2, 3);
//以上例程会输出：
//Number of arguments: 3
?><?php
function foo()
{
$numargs = func_get_args();//返回给函数传递的参数
print_r($numargs);
}
foo('a', 'b', 'c');
//以上例程会输出：
//Array ( [0] => a [1] => b [2] => c )
?><?php
function foo()
{
$numargs = func_get_arg(0);//返回给函数传递的参数个数
echo "Number of arguments: $numargs ";
}
foo('a', 'b', 'c');
//以上例程会输出：
//The argument is: a
?><?php
function foo() {
include './fna.php';
}
foo('First arg', 'Second arg');
?>
fna.php
<?php
$num_args = func_num_args();
var_export($num_args);
?>
