PHP中函数内引用全局变量的方法_PHP教程

先看下面的代码：

复制代码 代码如下:

$var1 = "#####";
$var2 = "&&&&&";

function global_references($use_globals)
{
global $var1, $var2;
if (!$use_globals) {
$var2 =&$var1; //1

} else {
$GLOBALS["var2"] =&$var1; //2

}
}

global_references(false);
echo "var2 is set to '$var2'
";
global_references(true);
echo "var2 is set to '$var2'
";
?>

输出的结果如下：
var2 is set to '&&&&&'
var2 is set to '#####'

可见，上面的代码中：
$var2 =&$var1; //1
只对函数内部可见。
而
$GLOBALS["var2"] =&$var1; //2
在全局范围内可见。

http://www.bkjia.com/PHPjc/319646.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/319646.htmlTechArticle先看下面的代码： 复制代码 代码如下: ?php $var1 = "#####"; $var2 = " function global_references($use_globals) { global $var1, $var2; if (!$use_globals) { $var2 = //1...