Reference UnSet

From LeakonWiki

代码：

<?php

function ChangeName(&$strName) {

	$strName	= 'ChangeName';

}

function ChangeName_UnSet(&$strName) {

	unset($strName);

	$strName	= 'ChangeName_UnSet';

}

$name_1		= 'Leakon_1';
$name_2		= 'Leakon_2';

ChangeName($name_1);
ChangeName_UnSet($name_2);

echo	$name_1 . "\n";
echo	$name_2 . "\n";

输出是什么？

ChangeName
Leakon_2