菜鸟问个简单的逻辑问题，求解答
我是想实现62进制的功能，可是下面这段代码只能echo出来，不能返回，不知道是什么原因，求高手解答
<br>function dwz($id,$str=""){<br> $a=array("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z");<br> $zs=(int)($id/sizeof($a));<br> $xs=$id%sizeof($a);<br> if($zs>=sizeof($a)){<br> $str=$a[$xs].$str;<br> dwz($zs,$str);<br> }<br> else{<br> if($str==""){<br> return $a[$zs].$a[$xs];<br> }<br> else{<br> echo $a[$zs].$str;//这里只能输出<br> return $a[$zs].$str;//返回没值，不知道什么原因<br> }<br> }<br>}<br>for($i=999990;$i<=1000000;$i++){<br> echo dwz($i);<br> echo "<br>";<br>}<br> 逻辑 菜鸟 简单的
