数据|数据库
/*******************************************
**********功能:php二级联动菜单*************
**********作者:冲星*************************
**********Email:njj@nuc.edu.cn**************
**********日期:2004/10/02******************
**********请转载时保留版权信息**************
*******************************************/
require_once('db.inc.php');//数据库连接
$db=new hq_online;
$db1=new hq_online;
$db->query("select * from news_bclass order by id desc");
$fMenu="";
$fValue="";
while($db->next_record()){
$fMenu.="\"".$db->Record["bname"]."\",";
$fValue.="\"".$db->Record["id"]."\",";
}
$fMenu=substr($fMenu,0,(strlen($fMenu)-1));
$fMenu="[".$fMenu."]";//*****************************得到var fMenu
$fValue=substr($fValue,0,(strlen($fValue)-1));
$fValue="[".$fValue."]";//*****************************得到var fValue
//得到*****************************var sMenu
$db->query("select * from news_bclass order by id desc");
while($db->next_record()){
$parentid=$db->Record["id"];
$db1->query("select * from news_sclass where parentid='$parentid' order by parentid desc");
while($db1->next_record()){
$num=$db1->num_rows();
$i++;
$sMenu.="\"".$db1->Record["sname"]."\",";
if($i==$num){
$sMenu="[".$sMenu."],[";
$i=0;
}
}
}
$sMenu.="]";
$sMenu=str_replace("\",]","\"]",$sMenu);
$sMenu=str_replace(",[]","]",$sMenu);
if((substr($sMenu,0,2))=="[\""){
$sMenu="[".$sMenu;
}else{
$sMenu=preg_replace("/\[{3,}/is","[[\\1",$sMenu);//匹配
}
//得到*****************************var sValue
$db->query("select * from news_bclass order by id desc");
while($db->next_record()){
$parentid=$db->Record["id"];
$db1->query("select * from news_sclass where parentid='$parentid' order by parentid desc");
while($db1->next_record()){
$nums=$db1->num_rows();
$j++;
$sValue.="\"".$db1->Record["id"]."\",";
if($j==$nums){
$sValue="[".$sValue."],[";
$j=0;
}
}
}
$sValue.="]";
$sValue=str_replace("\",]","\"]",$sValue);
$sValue=str_replace(",[]","]",$sValue);
if((substr($sValue,0,2))=="[\""){
$sValue="[".$sValue;
}else{
$sValue=preg_replace("/\[{3,}/is","[[\\1",$sValue);//匹配
}
?>
/*
调用方法:
将此代码保存为文件ld2.php
例如要在write.php页面放一个二级联动,则在write.php页面
要放置二级联动的地方加一句require_once("ld2.php");
若write.php要向save.php页面提交数据则在save.php中使用
$bigclass=$_POST["bigclass"];//取得大类的id值
$smallclass=$_POST["smallclass"];//取得小类的id值
接下来就知道该怎么做了吧……
附表的结构:
可能有的表的结构和我有些不同,但基本点都一样,修改程序
中对应字段和表名就ok
程序写的有点乱,不过绝对可以放心的使用
欢迎与我交流探讨!
---------------------------------------------------------
大类的表news_bclass结构
CREATE TABLE news_bclass (
id int(11) NOT NULL auto_increment,
bname varchar(10) NOT NULL default '',
PRIMARY KEY (id),
UNIQUE KEY id_2 (id),
KEY id (id)
) TYPE=MyISAM;
字段说明:bname为大类中文名称
------------------------------
小类的表news_sclass结构
CREATE TABLE news_sclass (
id int(11) NOT NULL auto_increment,
sname varchar(10) NOT NULL default '',
parentid int(10) NOT NULL default '0',
bname varchar(10) NOT NULL default '',
PRIMARY KEY (id),
UNIQUE KEY id_2 (id),
KEY id (id)
) TYPE=MyISAM;
字段说明:sname为小类中文名称
parendid为大类中的id值
bname为大类中文名称
-----------------------------------------------------------
*/
?>
db.inc.php文件的内容
class hq_online extends db_sql{
var $Host="localhost";
var $Database="hq";
var $User="root";
var $password="";
}

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