$a="baidu"; $b=& $a; unset($a); echo "a的值:".$a; echo "<br/>1---2<br/>"; echo "b的值:".$b; echo "<br/>3---4<br/>"; $c="baidu"; $d=& $c; unset($d); echo "c的值:".$c; echo "<br/>5---6<br/>"; echo "d的值:".$d; echo "<br/>7---8<br/>"; $e="baidu"; $f=& $e; $e.="123"; echo "e的值:".$e; echo "<br/>9---10<br/>"; echo "f的值:".$f; $f.="wer"; unset($f); echo "<br/>"; echo "e的值:".$e; echo "<br/>11---12<br/>"; echo "f的值:".$f;
unset其中一个之后,另一个的值还存在