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

前端技术 2023/09/03 PHP
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.

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