例子，建立登录界面及建立，删除表格
下面是登录框的代码
<!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> </head> <body> <form action="chuli.php" method="post"> <div>用户名：<input type="text" name="uid" /></div> <div>密码：<input type="password" name="pwd" /></div> <div><input type="submit" value="登录" /></div> </form> </body> </html>
下面是处理的php代码 chuli.php
<?php $uid = $_POST["uid"]; $pwd = $_POST["pwd"]; //造连接对象 $db = new MySQLi("localhost","root","123","mydb"); //写SQL语句 //SQL注入攻击 $sql = "select password from login where username='{$uid}'"; //执行SQL语句 $reslut = $db->query($sql); $n = $reslut->fetch_row(); if($uid!="" && $pwd !="" ) { if($n[0]==$pwd) { header("location:main.php"); } else { echo "用户名或密码错误！"; } } else { echo "用户名密码不能为空"; }
下面是主页面main.php
<!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> </head> <body> <table width="100%" border="1" cellpadding="0" cellspacing="0"> <tr> <td>代号</td> <td>姓名</td> <td>性别</td> <td>民族</td> <td>生日</td> <td>操作</td> </tr> <?php //造连接对象 $db = new MySQLi("localhost","root","123","mydb"); //写SQL语句 $sql = "select * from info"; //执行SQL语句 $result = $db->query($sql); //读数据 $attr = $result->fetch_all(); foreach($attr as $v) { echo "<tr>"; $sex = $v[2]?"男":"女"; //根据名族代号查询名族名称 $name = NationName($v[3]); echo "<td>{$v[0]}</td><td>{$v[1]}</td><td>{$sex}</td><td>{$name}</td><td>{$v[4]}</td><td><a href='shanchu.php?c={$v[0]}' onclick=\"return confirm('确定删除么？')\">删除</a></td>"; /*foreach($v as $v1) { echo "<td>{$v1}</td>"; }*/ echo "</tr>"; } //给一个民族代号，返回民族名称 function NationName($code) { //造连接对象 $db = new MySQLi("localhost","root","123","mydb"); //写SQL语句 $sql = "select name from nation where code='{$code}'"; //执行SQL语句 $result = $db->query($sql); $attr = $result->fetch_row(); return $attr[0]; } ?> </table> <a href="add.php"><input type="button" value="添加数据" /></a> </body> </html>
在下面是删除的了 shanchu.php
<?php $code = $_GET["c"]; //造连接对象 $db = new MySQLi("localhost","root","123","mydb"); $sql = "delete from info where code='{$code}'"; $r = $db->query($sql); if($r) { header("location:main.php"); } else { echo "删除失败"; }
再下面是添加的界面 add.php
<!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> </head> <body> <form action="addchuli.php" method="post"> <div>代号：<input type="text" name="code" /></div> <div>姓名：<input type="text" name="name" /></div> <div>性别： <input type="radio" name="sex" value="1" checked="checked" />男 <input type="radio" name="sex" value="0" />女 </div> <div>民族： <select name="nation"> <?php //造连接对象 $db = new MySQLi("localhost","root","123","mydb"); $sql = "select * from nation"; $result = $db->query($sql); $attr = $result->fetch_all(); foreach($attr as $v) { echo "<option value='{$v[0]}'>{$v[1]}</option>"; } ?> </select> </div> <div>生日：<input type="text" name="birthday" /></div> <div><input type="submit" value="添加" /></div> </form> </body> </html>
下面是添加的php代码 addchuli.php
<?php $code = $_POST["code"]; $name = $_POST["name"]; $sex = $_POST["sex"]; $nation = $_POST["nation"]; $birthday = $_POST["birthday"]; //造连接对象 $db = new MySQLi("localhost","root","123","mydb"); $sql = "insert into info values('{$code}','{$name}',{$sex},'{$nation}','{$birthday}')"; $db->query($sql); header("location:main.php");
