php中变量赋值是引用的例子

php中的变量赋值都是复制，但是有一个引用的例子，因为看手册的时候注意到了，在这里记下一笔

	$arr = array("name"=>"baixiaoshi","age"=>23);
	echo "<pre>";
		print_r($arr);
	echo "</pre>";
	$arr2 = $arr;
	//结果Array
/*(
    [name] => baixiaoshi
    [age] => 23
)*/

	$arr2["hobby"] = "run";
	echo "<pre>";
		print_r($arr2);
	echo "</pre>";
	//结果
	//Array
/*(
    [name] => baixiaoshi
    [age] => 23
    [hobby] => run
)*/

但是你看下面神奇的globals这个超全局变量，默认赋值的却是引用，

$_POST["A"] = "B";
 
	$nonReferencedPostVar = $_POST;
	$nonReferencedPostVar["A"] = "C";
	 
	echo "POST: ".$_POST["A"].", Variable: ".$nonReferencedPostVar["A"]."

";
	//输出结果POST: B, Variable: C
	// Testing Globals
	$GLOBALS["A"] = "B";
	 
	$nonReferencedGlobalsVar = $GLOBALS;
	$nonReferencedGlobalsVar["A"] = "C";
	 
	echo "GLOBALS: ".$GLOBALS["A"].", Variable: ".$nonReferencedGlobalsVar["A"]."

"; 
	//输出结果
	// GLOBALS: C, Variable: C