不适用javascript，完全通过PHP实现多级列表选择，列表数据从数据库获取,感兴趣的小伙伴，下面一起跟随编程之家 jb51.cc的小编来看看吧。
经测试代码如下：
/**
* 多级列表选择，列表数据从数据库获取
*
* @param
* @arrange (512.笔记) jb51.cc
#
# Table structure for table 'res_cat'
#
CREATE TABLE res_cat (
ID int(32) DEFAULT '0' NOT NULL,ID_uname char(40) NOT NULL,UNIQUE ID (ID)
);
#
# Dumping data for table 'res_cat'
#
INSERT INTO res_cat VALUES( '1','head1');
INSERT INTO res_cat VALUES( '101','cat11');
INSERT INTO res_cat VALUES( '102','cat12');
INSERT INTO res_cat VALUES( '103','cat13');
INSERT INTO res_cat VALUES( '10101','subcat111');
INSERT INTO res_cat VALUES( '10102','subcat112');
INSERT INTO res_cat VALUES( '10103','subcat113');
INSERT INTO res_cat VALUES( '1010101','subcat1111');
INSERT INTO res_cat VALUES( '1010102','subcat1112');
INSERT INTO res_cat VALUES( '1010103','subcat1113');
INSERT INTO res_cat VALUES( '10201','subcat121');
INSERT INTO res_cat VALUES( '10202','subcat122');
INSERT INTO res_cat VALUES( '10203','subcat123');
INSERT INTO res_cat VALUES( '10301','subcat131');
INSERT INTO res_cat VALUES( '10302','subcat132');
INSERT INTO res_cat VALUES( '10303','subcat133');
INSERT INTO res_cat VALUES( '2','head2');
INSERT INTO res_cat VALUES( '201','cat21');
INSERT INTO res_cat VALUES( '202','cat22');
INSERT INTO res_cat VALUES( '203','cat33');
etc ...
*/
$MysqL_link = MysqL_connect("localhost","user","passwd");
MysqL_select_db("res_cat",$MysqL_link);
echo "<html><body>" ;
function listrub ($id,$exploseID )
{
global $PHP_SELF ;
global $MysqL_link ;
$maxi = ($id*100)+100 ;
$mini = $id*100 ;
$query = "SELECT * FROM res_cat where ID < $maxi and ID > $mini " ;
echo "<ol>";
if( $MysqL_result = MysqL_query($query,$MysqL_link) )
{
while ($row = MysqL_fetch_object($MysqL_result))
{
// you have to link some action on leaves of course
echo "<li> <a href='$PHP_SELF?ID_rub=$row->ID' > $row->ID_uname </a> </li> " ;
$testID = ($exploseID - ($exploseID %100 ))/100 ; // WARNING this is ugly .. only 3 level
if ( $testID == $row->ID || $exploseID == $row->ID)
{
listrub ($row->ID,$exploseID ) ;
}
}
}
echo "</ol>";
}
$father =999999999; // a big number
// get the grand...grand father
if ( $ID_rub >100 )
{
$father = $ID_rub ;
while ( $father >100 ) { $father= ( $father - ( $father %100) )/100 ; }
}
else{$father= $ID_rub ;}
listrub ($father,$ID_rub,$MysqL_link ) ;
echo "</body></html>";
/*** 来自编程之家 jb51.cc（jb51.cc） ***/