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";

<?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";

--- 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.

最后

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