测试待的参数http://localhost/test/global.php?ab=aaaaaaaaaaa&bn=xxxxxxxx
$bbb = "bbb";
$ccc = "ccc";
global $bbb,$ccc;
print_r($GLOBALS);
echo "</br></br></br></br>";
print_r($_REQUEST);
?>
输出结果如下:
Array
(
[GLOBALS] => Array
*RECURSION*
[_POST] => Array
(
)
[_GET] => Array
(
[ab] => aaaaaaaaaaa
[bn] => xxxxxxxx
)
[_COOKIE] => Array
(
[PHPSESSID] => p1bab926qvm79r2uk6pr1qi0r1
)
[_FILES] => Array
(
)
[_REQUEST] => Array
(
[ab] => aaaaaaaaaaa
[bn] => xxxxxxxx
[PHPSESSID] => p1bab926qvm79r2uk6pr1qi0r1
)
[aaa] => aaa
[bbb] => bbb
[ccc] => ccc
)
</br></br></br></br>Array
(
[ab] => aaaaaaaaaaa
[bn] => xxxxxxxx
[PHPSESSID] => p1bab926qvm79r2uk6pr1qi0r1
)
可见,$GLOBALS 超全局变量 数组里包含了本页面所有使用的变量,变量名就是$GLOBALS数组的键值
PHP手册中队$GLOBALS 的定义:
包含一个引用指向每个当前脚本的全局范围内有效的变量。该数组的键名为全局变量的名称。从 PHP 3 开始存在 $GLOBALS 数组。