首先是几个简单的登录页面
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<body> <form action= "chuli.php" method= "post" > <div style="margin-left: 500px; margin-top: 200px; height: 250px; width: 250px; border: 1px dashed black"> <div style= "margin-left: 100px; " ><h3>登录</h3></div> <div style= "margin-top: 20px" >用户名:<input type= "text" name= "uid" /></div><br/> <div>密 码:<input type= "password" name= "pwd" /></div><br/> <div style= "margin-left: 180px" ><input type= "submit" value= "登录" /></div> </div> </form> </body> |
登录页面写好之后,需要进入处理页面,从数据库中调出用户名和密码:
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<?php session_start(); //开启session 必须要写到第一行 header( "content-type:text/html;charset=utf-8" ); $uid = $_post [ "uid" ]; //从登录页面获取到用户名和密码 $pwd = $_post [ "pwd" ]; include ( "dadb.class.php" ); $db = new dadb(); $sql = "select password from login where username='{$uid}'" ; $arr = $db ->query( $sql ); if ( $arr [0][0]== $pwd && ! empty ( $pwd )) //判断所填写的密码和取到的密码是一样的,而且密码不能为空 { $_session [ "uid" ]= $uid ; header( "location:main.php" ); } else { echo "登录失败" ; } |
这个显示的是登录页面
下面要进入主页面了,从数据库中把所有的水果信息调出来,然后我们再来实现加入购物车这一项功能
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<h2>大苹果购物网</h2> <?php session_start(); include ( "dadb.class.php" ); $db = new dadb(); ?> <table border= "1" width= "100%" cellpadding= "0" cellspacing= "0" > <tr> <td>代号</td> <td>水果名称</td> <td>水果价格</td> <td>原产地</td> <td>货架</td> <td>库存量</td> <td></td> </tr> <?php $uid = $_session [ "uid" ]; $sql = "select * from fruit" ; $arr = $db ->query( $sql ); foreach ( $arr as $v ) { echo "<tr> <td>{ $v [0]}</td> // 从数据库调出我们所需要的内容 <td>{ $v [1]}</td> <td>{ $v [2]}</td> <td>{ $v [3]}</td> <td>{ $v [4]}</td> <td>{ $v [5]}</td> <td><a href= 'add.php?ids={$v[0]}' >购买</a></td> //这里的购买相当于添加购物车的功能 </tr>"; } ?> <?php //这里显示的是 购物车有多少产品,和产品的总价格 $ann = array (); if (! empty ( $_session [ "gwc" ])) { $ann = $_session [ "gwc" ]; } $zhonglei = count ( $ann ); $sum =0; foreach ( $ann as $k ) { $sql1 = "select price from fruit where ids='{$v[0]}'" ; $danjia = $db ->query( $sql1 ); foreach ( $danjia as $n ) { $sum = $sum + $n [0]* $k [1]; } } echo "购物车有<mark>{$zhonglei}</mark>种商品,总价格为<mark>{$sum}</mark>元" ; ?> </table> <div> <a href= "gouwuche.php" rel= "external nofollow" rel= "external nofollow" >查看购物车</a> <a href= "main.php" rel= "external nofollow" rel= "external nofollow" >浏览商品</a> <a href= "zhanghu.php" rel= "external nofollow" rel= "external nofollow" >查看账户</a> </div> </body> |
主页面显示图
接下来是添加购物车页面
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<?php session_start(); $ids = $_get [ "ids" ]; if ( empty ( $_session [ "gwc" ])) { //1.购物车是空的,第一次点击添加购物车 $arr = array ( array ( $ids ,1) ); $_session [ "gwc" ]= $arr ; } else { //不是第一次点击 //判断购物车中是否存在该商品 $arr = $_session [ "gwc" ]; //先存一下 $chuxian = false; foreach ( $arr as $v ) { if ( $v [0]== $ids ) { $chuxian = true; } } if ( $chuxian ) { //3.如果购物车中有该商品 for ( $i =0; $i < count ( $arr ); $i ++) { if ( $arr [ $i ][0]== $ids ) { $arr [ $i ][1]+=1; } } $_session [ "gwc" ] = $arr ; } else { //2.如果购物车中没有该商品 $asg = array ( $ids ,1); $arr [] = $asg ; $_session [ "gwc" ] = $arr ; } } header( "location:gouwuche.php" ); |
然后先是购物车主界面,如下
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<h2>购物车中有以下商品:</h2> <table cellpadding= "0" cellspacing= "0" border= "1" width= "100%" > <tr> <td>商品名称</td> <td>商品单价</td> <td>购买数量</td> <td></td> </tr> <?php session_start(); //$uid=$_session["uid"]; $arr = array (); if (! empty ( $_session [ "gwc" ])) { $arr = $_session [ "gwc" ]; } include ( "dadb.class.php" ); $db = new dadb(); foreach ( $arr as $v ) { global $db ; $sql = "select * from fruit where ids='{$v[0]}'" ; $att = $db -> query( $sql ,1); foreach ( $att as $n ) { echo "<tr> <td>{ $n [1]}</td> <td>{ $n [2]}</td> <td>{ $v [1]}</td> <td> <a href= 'shanchu.php?sy={$k}' >删除</a></td> </tr> ";} } ?> </table> <div> <a href=" gouwuche.php " rel=" external nofollow " rel=" external nofollow " >查看购物车</a> <a href=" main.php " rel=" external nofollow " rel=" external nofollow " >浏览商品</a> <a href=" zhanghu.php " rel=" external nofollow " rel=" external nofollow" >查看账户</a> </div> 14 15 </body> |
紧接着我们就到了删除页面,当购物车只有一件商品和大于一件商品时做处理
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<?php session_start(); $sy = $_get [ "sy" ]; //根据索引找到该数据 $arr = $_session [ "gwc" ]; $arr [ $sy ]; //要删除的数据 //如果数量不为1,数量减1 if ( $arr [ $sy ][1]>1) { $arr [ $sy ][1] = $arr [ $sy ][1]-1; } else //如果数量为1,移除 { unset( $arr [ $sy ]); } $_session [ "gwc" ] = $arr ; //最后存一下购物车的内容 header( "location:gouwuche.php" ); |
至于提交页面,我们要想到余额,库存等因素,所以比较繁琐,
不i怕,上代码。
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<?php session_start(); header( "content-type:text/html;charset=utf-8" ); //防止出现乱码 $uid = $_session [ "uid" ]; //先查一下账户余额 include ( "dadb.class.php" ); $db = new dadb(); $ysql = "select account from login where username='{$uid}'" ; $yarr = $db ->query( $ysql ); $yarr [0][0]; //总额 //购物车的总价格,前面有写过 $arr = array (); if (! empty ( $_session [ "gwc" ])) { $arr = $_session [ "gwc" ]; } $sum =0; foreach ( $arr as $v ) { $v [1]; //购物车中产品的数量 $psql = "select price from fruit where ids='{$v[0]}'" ; $parr = $db ->query( $psql ); foreach ( $parr as $k ) { $k [0]; //产品的单价 $sum += $k [0]* $v [1]; } } //判断余额是否满足购买 if ( $yarr [0][0]>= $sum ) { //余额满足,要判断库存 foreach ( $arr as $v ) { $ksql = "select number from fruit where ids='{$v[0]}'" ; $karr = $db ->query( $ksql ); $karr [0][0]; //这是库存 if ( $karr [0][0]< $v [1]) //表示库存不足,这时要给顾客提示库存不足 { echo "库存不足" ; exit ; } } //判断之后需要提交订单了 //账户扣除余额 $kcsql = "update login set account=account-{$sum} where username='{$uid}'" ; $db ->query( $kcsql ,0); //这里是修改语句,所以要加上0 //扣除库存 foreach ( $arr as $v ) { $kcksql = "update fruit set number=number-$v[1] where ids='{$v[0]}'" ; $db ->query( $kcksql ,0); } //所有的工作都做完了,这时我们就该提交订单了 // 这里我在数据库中做了两张表,把提交的订单添加到表中就可以保存了 //添加订单 $ddh = date ( "ymdhis" ); $time = date ( "y-m-d h:i:s" ); $sdd = "insert into orders values('{$ddh}','{$uid}','{$time}')" ; $db ->query( $sdd ,0); //添加订单详情 foreach ( $arr as $v ) { $sddxq = "insert into orderdetails values('','{$ddh}','{$v[0]}','{$v[1]}')" ; $db ->query( $sddxq ,0); } } else { echo "余额不足" ; exit ; } ?> |
实现功能是没问题的
以上就是本文的全部内容,希望本文的内容对大家的学习或者工作能带来一定的帮助,同时也希望多多支持服务器之家!
原文链接:http://www.cnblogs.com/li1056822533/p/6523483.html