global全局变量
发布时间：2014-07-10 18:06:06 作者：admin 阅读：1032次global1.php
<?php
//http://baike.baidu.com/link?url=MkrIj703CIMZt8Gw5P1Cb0yLS4dVNcuLiKU-tUohmDvHLy-h7ITlSSx5UqTwmZTG24vf13_LppPaKNFzpq1Bea$x = 75;
$y = 25;
function addition()
{
$GLOBALS['z'] = $GLOBALS['x'] + $GLOBALS['y'];
}
addition();
echo $z;
?>
global2.php
<?php
//http://zhidao.baidu.com/link?url=_lORJbc-tPYwiSu7LYM1m52cW2FwgLKEhs2Dw1yOlQ7L8NZbbNIBtD5BEV4QUjj8pZxhg86FZN87mK5iDcFFnq
$var = 100;
echo "var=>".$var;
function fun1(){
echo($var);
}
fun1();
function fun2(){
global $var;
echo("var=>".$var);
}
fun2();
?>
<?php
//http://happyqyt10.blog.163.com/blog/static/3002347620103215515309/
// 例子1
function test_global() {
global $var1, $var2;
$var2 =& $var1;
}
function test_globals() {
$GLOBALS['var3'] =& $GLOBALS['var1'];
}
$var1 = 5;
$var2 = $var3 = 0;
test_global();
print $var2 ."\n";
test_globals();
print $var3 ."\n";
?>
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