<?php
header("Content-Type:text/html;charset=utf-8");
include('./db.inc.php');
function cateList($pid=0,&$result=array(),$spac=0){
	$spac+=2;
	$sql="SELECT * FROM cate WHERE pid=$pid";
	$res=mysql_query($sql);
	while($row=mysql_fetch_assoc($res)){
		$row['catename']=str_repeat('&nbsp;&nbsp;', $spac).'|--'.$row['catename'];
		$result[]=$row;
		cateList($row['id'],$result,$spac);
	}
	return $result;
}

function displayCate($pid=0,$select=1){
	$rs=cateList($pid);
	$str='';
	$str.= "<select name='cate'>";
	foreach ($rs as $k => $v) {
		$selectstr='';
		if($v['id']==$select){
			$selectstr="selected";
		}
		$str.= "<option {$selectstr}>{$v['catename']}</option>";
	}
	return $str.= "</select>";
}
echo displayCate(0,5);
?>