脚本之家 服务器常用软件
快捷导航
您的位置：首页 → 网络编程 → PHP编程 → php技巧 → global 全局环境

实测在class的function中include的文件中非php的global全局环境

 更新时间：2013年07月15日 17:17:13   作者：  
正如标题所言经测试的结果为：在class中include后,被include文件变量域已经变成func中了,非全局.但是可以通过global提升，感兴趣的朋友可以参考下哈，希望对大家有所帮助
测试代码1.php
复制代码 代码如下:

<?php
$g1 = 'g1';
class c{
function fun() {
include('2.php');
echo "\n-----in class fun---\n";
global $g1;
var_dump("\$g1 => ", $g1
,'$g2 => ', $g2
,'$gg2 => ', $gg2
);
echo "\n--------\n";
}
}
c::fun();
echo "\n--- in 1.php ----\n";
var_dump('$g1 => ', $g1
,'$g2 => ', $g2
,'$gg2 => ', $gg2);
echo "\n--- ----\n";

代码2.php
复制代码 代码如下:

<?php
$g2 = 'g2';
global $gg2;//本环境下并非全局,需要提升
$gg2 = 'gg2';
function g2fun() {
global $g1, $g2, $gg2;
echo "\n--- in g2fun ----\n";
var_dump('$g1 => ', $g1, '$g2 => ', $g2
, '$gg2 => ', $gg2);
echo "\n--- ----\n";
}
g2fun();
echo "\n--- in 2.php ----\n";
var_dump('$g1 => ', $g1, '$g2 => ', $g2
, '$gg2 => ', $gg2
);
echo "\n--- ----\n";
global $g1;
echo "\n--- in 2.php global----\n";
var_dump('$g1 => ', $g1, '$g2 => ', $g2
, '$gg2 => ', $gg2
);
echo "\n--- ----\n";

结果
复制代码 代码如下:

--- in g2fun ----
string(7) "$g1 => "
string(2) "g1"
string(7) "$g2 => "
NULL
string(8) "$gg2 => "
string(3) "gg2"
--- ----
--- in 2.php ----
string(7) "$g1 => "
NULL
string(7) "$g2 => "
string(2) "g2"
string(8) "$gg2 => "
string(3) "gg2"
--- ----
--- in 2.php global----
string(7) "$g1 => "
string(2) "g1"
string(7) "$g2 => "
string(2) "g2"
string(8) "$gg2 => "
string(3) "gg2"
--- ----
-----in class fun---
string(7) "$g1 => "
string(2) "g1"
string(7) "$g2 => "
string(2) "g2"
string(8) "$gg2 => "
string(3) "gg2"
--------
--- in 1.php ----
string(7) "$g1 => "
string(2) "g1"
string(7) "$g2 => "
NULL
string(8) "$gg2 => "
string(3) "gg2"
--- ----

由此可见,
在class中include后,被include文件变量域已经变成func中了,非全局.
但是可以通过global提升.
一般被include文件在编写时,可能会由于没有注意到被include的情况,就觉得有点郁闷了.
您可能感兴趣的文章:

相关文章

最新评论