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.
