例子：购物车的简单实现
购物车例子：
登录界面：验证用户名与密码是否匹配
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <script src="../jquery-1.11.2.min.js"></script> <title>无标题文档</title> </head> <body> <div>账号：<input type="text" id="uid" /></div> <div>密码：<input type="text" id="pwd" /></div> <input type="button" value="登录" id="btn" /> </body> </html> <script type="text/javascript"> $("#btn").click(function(){ var u = $("#uid").val(); var p = $("#pwd").val(); $.ajax({ url:"zhuyecl.php", data:{u:u,p:p}, type:"POST", dataType:"TEXT", success: function(data){ if(data.trim()=="OK") { window.location.href="denglu.php"; } else { alert("账号或密码错误"); } } }) }) </script>
php处理登录：
<?php session_start(); $uid = $_POST["u"]; $pwd = $_POST["p"]; include("../fengzhuang.class.php"); $db = new fengzhuang(); $sql = "select password from login where username='{$uid}'"; $mm = $db->strquery($sql); if($mm = $pwd && $pwd!="") { $_SESSION["uid"]=$uid; //把用户名存入session echo "OK"; } else { echo "NO"; }
商品显示主页：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> <style type="text/css"> .dh{ width:100px; height:60px; color:#C06} .dh:hover{ color:#FFF; background-color:#069; border-radius:7px; cursor:pointer} </style> </head> <body> <!--背景色--> <div style=" width:1347px; height:600px; background-color:#09C"></div> <!--标题--> <div style="font-size:35px; color:#FFF; position:relative; margin-top:-550px; margin-left:550px; font-weight:bold">大苹果购物网</div> <!--显示出来的水果表信息--> <div style="width:700px; position:relative; top:100px; left:400px; text-align:center; line-height:30px; vertical-align:middle; font-weight:bold"> <table width="700" cellpadding="0" cellspacing="0" style="background-color:#069; border-radius:8px"> <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>操作</td> </tr> <?php include("../fengzhuang.class.php"); $db = new fengzhuang(); $sql = "select ids,name,price,source,shelves,numbers from fruit"; $attr = $db->query($sql); foreach($attr as $v) { echo "<tr style='background-color:white'> <td>{$v[0]}</td> <td>{$v[1]}</td> <td>{$v[2]}</td> <td>{$v[3]}</td> <td>{$v[4]}</td> <td>{$v[5]}</td> <td><a href='goumai.php?code={$v[0]}'>购买</a></td> </tr>"; } ?> </table> </div> <!--导航--> <div style=" width:100px; position:relative; margin-top:-100px; margin-left:270px; line-height:60px; text-align:center;
vertical-align:middle; background-color:#FFF; border-radius:7px"> <a href="main.php"><div class="dh">浏览商品</div></a> <a href="zhanghu.php"><div class="dh">查看账户</div></a> <a href="gouwuche.php"><div class="dh">查看购物车</div></a> </div> <!--技术链接--> <div style=" width:200px; color:#FFF; position:relative; font-size:20px; position:relative; top:120px; left:580px">天启网络版权所有</div> </body> </html>
点击购买处理页面：
<?php session_start(); $code = $_GET["code"]; //因为购买的数量增加，不能只存一个主键值，还要存数量，用二维数组存 if(empty($_SESSION["gwc"])) { //第一次点击购买 $attr = array(array($code,1)); $_SESSION["gwc"] = $attr; } else { //不是第一次点击购买 $attr = $_SESSION["gwc"]; $bs = 0; foreach($attr as $k=>$v) //复制一份给予V 可以进行判断、读取，但不可以进行操作 { if($v[0]==$code) { $bs=1; $attr[$k][1] = $attr[$k][1]+1; //水果代号出现加1 } } //如果没有在数组里面出现 if($bs==0) { $shuzu = array($code,1); $attr[] = $shuzu; } $_SESSION["gwc"]=$attr; }
点击查看购物车，跳转界面，实现当点击购买时数量增加，点击删除时数量减少
<?php session_start(); ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> <style type="text/css"> .dh{ width:100px; height:60px; color:#C06} .dh:hover{ color:#FFF; background-color:#069; border-radius:7px; cursor:pointer} </style> </head> <body> <!--背景色--> <div style=" width:1347px; height:600px; background-color:#09C"></div> <!--标题--> <div style="font-size:35px; color:#FFF; position:relative; margin-top:-550px; margin-left:550px; font-weight:bold">大苹果购物网</div> <!--显示出来的水果表信息--> <div style="width:700px; position:relative; top:100px; left:400px; text-align:center; line-height:30px; vertical-align:middle; font-weight:bold"> <table width="700" cellpadding="0" cellspacing="0" style="background-color:#069; border-radius:8px"> <tr> <td>商品名称</td> <td>商品单价</td> <td>购买数量</td> <td>操作</td> </tr> <?php include("../fengzhuang.class.php"); $db = new fengzhuang(); $attr = array(); if(!empty($_SESSION["gwc"])) { $attr = $_SESSION["gwc"]; } foreach($attr as $v) { $sql = "select name,price from fruit where ids='{$v[0]}'"; $ashuiguo = $db->query($sql); echo "<tr><td>{$ashuiguo[0][0]}</td><td>{$ashuiguo[0][1]}</td><td>{$v[1]}</td><td>删除</td></tr>"; } ?> </table> </div> <!--导航--> <div style=" width:100px; position:relative; margin-top:-100px; margin-left:270px; line-height:60px;
text-align:center; vertical-align:middle; background-color:#FFF; border-radius:7px"> <a href="main.php"><div class="dh">浏览商品</div></a> <a href="zhanghu.php"><div class="dh">查看账户</div></a> <a href="gouwuche.php"><div class="dh">查看购物车</div></a> </div> <!--技术链接--> <div style=" width:200px; color:#FFF; position:relative; font-size:20px; position:relative; top:120px; left:580px">天启网络版权所有</div> </body> </html>
建删除界面（纯php操作）：
<?php session_start(); $sy = $_GET["sy"]; $attr = $_SESSION["gwc"]; if($attr[$sy][1]>1) { //如果数量大于1，减1 $attr[$sy][1] = $attr[$sy][1]-1; } else { //如果数量小雨1，直接移除 unset($attr[$sy]); $attr = array_values($attr); } $_SESSION["gwc"]=$attr; header("location:gouwuche.php");
动态显示购买的商品信息（在主页内嵌入php代码）：
//首先开启session <?php session_start(); include("../fengzhuang.class.php"); $db = new fengzhuang(); ?>
//在表格上面加php代码，用div显示一句话 <?php $agwc = array(); if(!empty($_SESSION["gwc"])) { $agwc = $_SESSION["gwc"]; } $zhonglei = count($agwc); //种类数量 $sum = 0; //总价格之和 foreach($agwc as $v) { $sql = "select price from fruit where ids='{$v[0]}'"; $danjia = $db->strquery($sql); $sum = $sum+$danjia*$v[1];//单加乘以数量 } echo "<div>购物车中有：{$zhonglei}种商品，总价格为：{$sum}元.</div>"; ?>
订单操作、在购物车界面加提示
<div id="tj">提交订单</div><div id="ts"></div> //在这里加在表格下了
在购物车界面嵌入ajax代码：
<script type="text/javascript"> $("#tj").click(function() { $.ajax({ url:"dingdan.php", dataType:"TWXT", success: function(){ if(data.trim()=="OK") { alert("购买成功"); } else if(data.trim()=="YEBZ") { $("#ts").html("余额不足") $("#ts").css("color","red") } else { $("#ts").html(data) $("#ts").css("color","red") } } }) }); </script>
订单处理界面：
<?php session_start(); include("../fengzhuang.class.php"); $db = new fengzhuang(); $uid = $_SESSION["uid"]; $attr = array(); if(!empty($_SESSION["gwc"])) { $attr = $_SESSION["gwc"]; } //看下两个条件是否都满足 $bs = true; //判断余额是否满足 //根据用户名找余额 $syue = "select account from login where username='{$uid}'"; $yue = $db->strquery($syue); //根据购物车数组取总金额 $sum = 0; //总价格之和 foreach($agwc as $v) { $sql = "select price from fruit where ids='{$v[0]}'"; $danjia = $db->strquery($sql); $sum = $sum+$danjia*$v[1];//单加乘以数量 } if($yue<$sum) { $bs=false; echo "YEBZ"; exit; } //判断库存是否满足 foreach($attr as $v) { $skucun = "select name,numbers from fruit where ids='{$v[0]}'"; $akucun = $db->query($skucun); if($akucun[1]<$v[1]) { $bs=false; echo "{$akucun[0]}库存不足！"; exit; } } //添加订单，减库存，减余额 if($bs) { //减库存 foreach($attr as $v) { $sql = "update fruit set numbers = numbers-{$v[1]} where ids='{$v[0]}'"; $db->query($sql,0); } //减余额 $jianyue="undate login set account=account-{$sum} where ids='{$v[0]}'"; $db->query($jianyue,0); //添加订单 $dingdanhao = $uid+date("YmdHis"); $t = time(); $sorder = "insert into orders values('{$dingdanhao}','{$uid}','{$t}')"; $db->query($sorder,0); //订单详情表 foreach($attr as $v) { $sxq = "insert into orderdetails values('','{$dingdanhao}','{$v[0]}','$v[1]')"; $db->query($sxq,0); } } echo "OK";
查看账户：
<?php session_start(); $uid = $_SESSION['uid']; ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title><br /> <style type="text/css"> .list{ width:100%; height:30px; margin-top:10px; text-align:center; line-height:30px; vertical-align:middle} </style> </head> <body> <div style="width:100%; height:100px; background-color:#6CC"> <h1 style="float:left">大苹果商城</h1> <a style="float:right; margin-top:40px" href="zhuxiao.php">注销</a> </div> <br /> <div style="width:100%; height:600px"> <div id="left" style="width:20%; float:left"> <a href="main.php"><div class="list">浏览商品</div></a> <a href="zhanghu.php"><div class="list">查看账户</div></a> <a href="gouwuche.php"><div class="list">查看购物车</div></a> </div> <div id="right" style="width:80%; height:150px; float:left">
<?php include("../DBDA.class.php"); $db = new DBDA(); $sql = "select Account from login where UserName='{$uid}'"; $result = $db->strQuery($sql); echo ("您的账户中还剩余".$result); ?>
</div> </div> </body> </html>
