用PHP添加购物商品，PHP添加购物商品_PHP教程

用PHP添加购物商品，PHP添加购物商品

<span><span> 1</span> <?<span>php
</span><span> 2</span> <span>session_start</span><span>(); 
</span><span> 3</span> <span>header</span> ( "Content-type: text/html; charset=UTF-8" );                         <span>//</span><span>设置文件编码格式</span>
<span> 4</span> <span>require</span>("system/system.inc.php");                          <span>//</span><span>包含配置文件</span>
<span> 5</span> <span>/*</span><span>*
</span><span> 6</span> <span>    *  1表示添加成功
</span><span> 7</span> <span>    *  2表示用户没有登录
</span><span> 8</span> <span>    *  3表示商品已添加过
</span><span> 9</span> <span>    *  4表示添加时出现错误
</span><span>10</span> <span>    *  5表示没有商品添加
</span><span>11</span> <span>*/</span>
<span>12</span> <span>$reback</span> = '0'<span>;
</span><span>13</span> <span>if</span>(<span>empty</span>(<span>$_SESSION</span>['member'])){ <span>//</span><span>判断用户有没有登录</span>
<span>14</span>     <span>$reback</span> = '2';              <span>//</span><span>没有就返回2</span>
<span>15</span> }<span>else</span><span>{
</span><span>16</span>     <span>$key</span> = <span>$_GET</span>['key'];         <span>//</span><span>判断用户有没有添加商品</span>
<span>17</span>     <span>if</span>(<span>$key</span> == ''){              <span>//</span><span>判断用户有没有添加商品，如果为空就表示没有商品喽</span>
<span>18</span>         <span>$reback</span> = '5';           <span>//</span><span>返回值</span>
<span>19</span>     }<span>else</span><span>{    
</span><span>20</span>         <span>$boo</span> = <span>false</span>;             <span>//</span><span>定义商品有没有被添加</span>
<span>21</span>         <span>$sqls</span> = "select id,shopping from tb_user where name = '".<span>$_SESSION</span>['member']."'"<span>; 
</span><span>22</span>         <span>$shopcont</span> = <span>$admindb</span>->ExecSQL(<span>$sqls</span>,<span>$conn</span><span>);
</span><span>23</span>         <span>if</span>(!<span>empty</span>(<span>$shopcont</span>[0]['shopping'])){  <span>//</span><span>shopping为三维数组，用empty判断商品是否为空</span>
<span>24</span>             <span>$arr</span> = <span>explode</span>('@',<span>$shopcont</span>[0]['shopping']);<span>//</span><span>@分割数组也就是每个商品的值</span>
<span>25</span>             <span>foreach</span>(<span>$arr</span> <span>as</span> <span>$value</span>){ <span>//</span><span>foreach取出每个数组的值</span>
<span>26</span>                 <span>$arrtmp</span> = <span>explode</span>(',',<span>$value</span>);            <span>//</span><span>用explode分割得出商品的俱体信息</span>
<span>27</span>                 <span>if</span>(<span>$key</span> == <span>$arrtmp</span>[0]){                 <span>//</span><span>如果添加的商品等于已添加的商品</span>
<span>28</span>                     <span>$reback</span> = '3';                      <span>//</span><span>那么返回值就表示已添加</span>
<span>29</span>                     <span>$boo</span> = <span>true</span><span>;                         
</span><span>30</span>                     <span>break</span><span>;
</span><span>31</span> <span>                }
</span><span>32</span> <span>            }
</span><span>33</span>             <span>if</span>(<span>$boo</span> == <span>false</span>){              <span>//</span><span>方法一添加商品</span>
<span>34</span>                 <span>$shopcont</span>[0]['shopping'] .= '@'.<span>$key</span>.',1'<span>; 
</span><span>35</span>                 <span>$update</span> = "update tb_user set shopping='".<span>$shopcont</span>[0]['shopping']."' where name = '".<span>$_SESSION</span>['member']."'"<span>;
</span><span>36</span>                 <span>$shop</span> = <span>$admindb</span>->ExecSQL(<span>$update</span>,<span>$conn</span><span>);
</span><span>37</span>                 <span>if</span>(<span>$shop</span><span>){
</span><span>38</span>                     <span>$reback</span> = 1<span>;
</span><span>39</span>                 }<span>else</span><span>{
</span><span>40</span>                     <span>$reback</span> = '4'<span>;
</span><span>41</span> <span>                }
</span><span>42</span> <span>            }
</span><span>43</span>         }<span>else</span><span>{
</span><span>44</span>             <span>$arrtmp</span> = <span>$key</span>.",1";          <span>//</span><span>方法二添加商品</span>
<span>45</span>             <span>$updates</span> = "update tb_user set shopping='".<span>$arrtmp</span>."' where name = '".<span>$_SESSION</span>['member']."'"<span>;
</span><span>46</span>             <span>$result</span> = <span>$admindb</span>->ExecSQL(<span>$updates</span>,<span>$conn</span><span>);
</span><span>47</span>             <span>if</span>(<span>$result</span><span>){
</span><span>48</span>                 <span>$reback</span> = 1<span>;
</span><span>49</span>             }<span>else</span><span>{
</span><span>50</span>                 <span>$reback</span> = '4'<span>;
</span><span>51</span> <span>            }
</span><span>52</span> <span>        }
</span><span>53</span> <span>    }
</span><span>54</span> <span>}
</span><span>55</span> <span>echo</span> <span>$reback</span><span>;
</span><span>56</span> ?></span>

PHP 购物网站 怎在后台添加商品并在前台显示？

可以用PHP的网店程序，也可以自己写！

如果用网店程序的话，详看一下相关后台的说明。其实很简单的。

如果自己有能力写的话 完全可以自己写，EASY。
 

怎防止刷新浏览器购物车中商品数量自动加1,php做的购物网站

用Ajax做异步提交，都是这么做的。。。addtocart();
 

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