在class的function中include的文件中,非php的global全局环境

测试代码1.php

<?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

<?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

--- in g2fun ----string(7) "$g1 => "string(2) "g1"string(7) "$g2 => "NULLstring(8) "$gg2 => "string(3) "gg2"---  ------- in 2.php ----string(7) "$g1 => "NULLstring(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 => "NULLstring(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.