在再简化代码需求～该如何解决

$x = md5($row['userid']."+".$row['pwd']);<br />$str = base64_encode($row['userid'].".".$x);<br />//print_r($str);die;<br />$b=explode("/",DEDEROOT);<br />$c=$b['1'];<br />$a ='/reg/resetpw.php?p='.$str;<br />$a = "<a href='$a'>$c.$a</a>"; 

<br />list($b,$c,$d)=explode("/",DEDEROOT);<br />$a ='/reg/resetpw.php?p='.base64_encode($row['userid'].".".md5($row['userid']."+".$row['pwd']));<br />$a = "<a href='$a'>$c.$a</a>";<br />

strtok(DEDEROOT, "/");<br />$a ='/reg/resetpw.php?p=' . base64_encode($row['userid'].".".md5($row['userid']."+".$row['pwd']));<br />$a = "<a href='$a'>".strtok("/")."$a</a>";