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.