//建一个连接，造一个连接对象 $db = new MySQLi("localhost","root","123","mydb"); //判断是否出错 /*if(mysqli_connect_error()) { echo "连接失败！"; exit; }*/ mysqli_connect_error()?die("连接失败"):""; //写SQL语句 $sql = "select * from Info"; //执行SQL语句，返回结果集对象 $reslut = $db->query($sql); //从结果集中读取数据,返回数组 //$attr = $reslut->fetch_all(); //读取所有数据，返回索引二维数组 //$attr = $reslut->fetch_array(); //读取当前指针指向的数据，返回索引关联都存在的数组 //$attr = $reslut->fetch_assoc(); //返回关联数组 $attr = $reslut->fetch_row(); //返回索引数组 //$attr = $reslut->fetch_object(); //返回对象 /*$arr = array(); while($attr = $reslut->fetch_row()) { array_push($arr,$attr); } var_dump($arr);*/
登陆页面 text.php
1 <form action="chuli.php" method="post"> 2 3 <div>用户名：<input type="text" name="uid" /></div> 4 <div>密码：<input type="password" name="pwd" /></div> 5 <div><input type="submit" value="登录" /></div> 6 </form>
登陆处理 chili.php
1 <?php 2 $uid = $_POST["uid"]; 3 $pwd = $_POST["pwd"]; 4 5 //造连接对象 6 $db = new MySQLi("localhost","root","123","mydb"); 7 8 //写SQL语句 9 //SQL注入攻击 10 11 $sql = "select password from login where username='{$uid}'"; 12 13 14 //执行SQL语句 15 $reslut = $db->query($sql); 16 17 $n = $reslut->fetch_row(); 18 19 if($uid!="" && $pwd !="" ) 20 { 21 if($n[0]==$pwd) 22 { 23 header("location:main.php"); 24 } 25 else 26 { 27 echo "用户名或密码错误！"; 28 } 29 } 30 else 31 { 32 echo "用户名密码不能为空"; 33 } 34 ?>
主页面 main.php
1 <form action="main.php" method="post"> 2 <div>姓名: 3 <input type="text" name="xm" /> 4 <input type="submit" value="查询" /> 5 </div> 6 </form> 7 <br /> 8 <table width="100%" border="1" cellpadding="0" cellspacing="0"> 9 <tr> 10 <td>代号</td> 11 <td>姓名</td> 12 <td>性别</td> 13 <td>民族</td> 14 <td>生日</td> 15 <td>操作</td> 16 </tr> 17 18 <?php 19 20 //先判断有没有提交值 21 $xxm = ""; 22 $tj = " 1=1 "; 23 if(!empty($_POST["xm"]) && $_POST["xm"]!="") 24 { 25 $xxm = $_POST["xm"]; 26 $tj = " name like '%{$xxm}%' "; 27 } 28 29 //造连接对象 30 $db = new MySQLi("localhost","root","123","mydb"); 31 //写SQL语句 32 $sql = "select * from info where ".$tj; 33 echo $sql; 34 //执行SQL语句 35 $result = $db->query($sql); 36 //读数据 37 $attr = $result->fetch_all(); 38 39 foreach($attr as $v) 40 { 41 echo "<tr>"; 42 43 $sex = $v[2]?"男":"女"; 44 45 //根据名族代号查询名族名称 46 $name = NationName($v[3]); 47 48 //替换关键字 49 $newname = str_replace($xxm,"<mark>{$xxm}</mark>",$v[1]); 50 51 echo "<td>{$v[0]}</td><td>{$newname}</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><a href='xiugai.php?c={$v[0]}'>修改</a></td>"; 52 53 /*foreach($v as $v1) 54 { 55 echo "<td>{$v1}</td>"; 56 }*/ 57 58 echo "</tr>"; 59 } 60 61 //给一个民族代号，返回民族名称 62 function NationName($code) 63 { 64 //造连接对象 65 $db = new MySQLi("localhost","root","123","mydb"); 66 //写SQL语句 67 $sql = "select name from nation where code='{$code}'"; 68 //执行SQL语句 69 $result = $db->query($sql); 70 71 $attr = $result->fetch_row(); 72 73 return $attr[0]; 74 } 75 76 ?> 77 78 79 </table> 80 <a href="add.php"><input type="button" value="添加数据" /></a>
删除处理 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"; }
添加页面 add.php
1 <form action="addchuli.php" method="post"> 2 <div>代号：<input type="text" name="code" /></div> 3 <div>姓名：<input type="text" name="name" /></div> 4 <div>性别： 5 <input type="radio" name="sex" value="1" checked="checked" />男 6 7 <input type="radio" name="sex" value="0" />女 8 </div> 9 <div>民族： 10 <select name="nation"> 11 <?php 12 //造连接对象 13 $db = new MySQLi("localhost","root","123","mydb"); 14 $sql = "select * from nation"; 15 $result = $db->query($sql); 16 $attr = $result->fetch_all(); 17 18 foreach($attr as $v) 19 { 20 echo "<option value='{$v[0]}'>{$v[1]}</option>"; 21 } 22 ?> 23 </select> 24 </div> 25 <div>生日：<input type="text" name="birthday" /></div> 26 27 <div><input type="submit" value="添加" /></div> 28 </form>
添加处理页面 addchuli.php
1 <?php 2 $code = $_POST["code"]; 3 $name = $_POST["name"]; 4 $sex = $_POST["sex"]; 5 $nation = $_POST["nation"]; 6 $birthday = $_POST["birthday"]; 7 8 //造连接对象 9 $db = new MySQLi("localhost","root","123","mydb"); 10 11 $sql = "insert into info values('{$code}','{$name}',{$sex},'{$nation}','{$birthday}')"; 12 13 $db->query($sql); 14 15 header("location:main.php"); 16 ?>
修改页面 xiugai.php
1 <?php 2 $code = $_GET["c"]; 3 //造连接对象 4 $db = new MySQLi("localhost","root","123","mydb"); 5 //写SQL语句 6 $sinfo = "select * from info where code='{$code}'"; 7 8 $rinfo = $db->query($sinfo); 9 10 $ainfo = $rinfo->fetch_row(); 11 ?> 12 13 <form action="xiugaichuli.php" method="post"> 14 <div><input type="hidden" name="code" value="<?php echo $ainfo[0]; ?>" /></div> 15 <div>姓名：<input type="text" name="name" value="<?php echo $ainfo[1]; ?>" /></div> 16 17 18 19 <div>性别： 20 <input type="radio" name="sex" value="1" <?php echo $ainfo[2]?"checked='checked'":"" ?> />男 21 22 <input type="radio" name="sex" value="0" <?php echo $ainfo[2]?"":"checked='checked'" ?> />女 23 </div> 24 25 26 27 <div>民族： 28 <select name="nation"> 29 <?php 30 31 $sql = "select * from nation"; 32 $result = $db->query($sql); 33 $attr = $result->fetch_all(); 34 35 foreach($attr as $v) 36 { 37 if($v[0]==$ainfo[3]) 38 { 39 echo "<option selected='selected' value='{$v[0]}'>{$v[1]}</option>"; 40 } 41 else 42 { 43 echo "<option value='{$v[0]}'>{$v[1]}</option>"; 44 } 45 } 46 ?> 47 </select> 48 </div> 49 50 51 52 <div>生日：<input type="text" name="birthday" value="<?php echo $ainfo[4]; ?>" /></div> 53 54 <div><input type="submit" value="修改" /></div> 55 </form>
修改处理 xiugaichuli.php
1 <?php 2 $code = $_POST["code"]; 3 $name = $_POST["name"]; 4 $sex = $_POST["sex"]; 5 $nation = $_POST["nation"]; 6 $birthday = $_POST["birthday"]; 7 8 //造连接对象 9 $db = new MySQLi("localhost","root","123","mydb"); 10 11 $sql = "update info set name='{$name}',sex={$sex},nation='{$nation}',birthday='{$birthday}' where code='{$code}'"; 12 13 $db->query($sql); 14 15 header("location:main.php");
查询页面 duotiaojian.php
1 <form action="duotiaojian.php" method="post"> 2 <div>姓名: 3 <input type="text" name="xm" /> 4 民族代号： 5 <input type="text" name="mz" /> 6 <input type="submit" value="查询" /> 7 </div> 8 </form> 9 <br /> 10 <table width="100%" border="1" cellpadding="0" cellspacing="0"> 11 <tr> 12 <td>代号</td> 13 <td>姓名</td> 14 <td>性别</td> 15 <td>民族</td> 16 <td>生日</td> 17 <td>操作</td> 18 </tr> 19 20 <?php 21 22 //先判断有没有提交值 23 $xxm = ""; 24 $tj = " 1=1 "; 25 $tj2 = " 1=1 "; 26 if(!empty($_POST["xm"]) && $_POST["xm"]!="") 27 { 28 $xxm = $_POST["xm"]; 29 $tj = " name like '%{$xxm}%' "; 30 } 31 32 if(!empty($_POST["mz"]) && $_POST["mz"]!="") 33 { 34 $mz = $_POST["mz"]; 35 $tj2 = " nation='{$mz}' "; 36 } 37 38 39 40 //造连接对象 41 $db = new MySQLi("localhost","root","123","mydb"); 42 //写SQL语句 43 $sql = "select * from info where ".$tj." and ".$tj2; 44 echo $sql; 45 //执行SQL语句 46 $result = $db->query($sql); 47 //读数据 48 $attr = $result->fetch_all(); 49 50 foreach($attr as $v) 51 { 52 echo "<tr>"; 53 54 $sex = $v[2]?"男":"女"; 55 56 //根据名族代号查询名族名称 57 $name = NationName($v[3]); 58 59 //替换关键字 60 $newname = str_replace($xxm,"<mark>{$xxm}</mark>",$v[1]); 61 62 echo "<td>{$v[0]}</td><td>{$newname}</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><a href='xiugai.php?c={$v[0]}'>修改</a></td>"; 63 64 /*foreach($v as $v1) 65 { 66 echo "<td>{$v1}</td>"; 67 }*/ 68 69 echo "</tr>"; 70 } 71 72 //给一个民族代号，返回民族名称 73 function NationName($code) 74 { 75 //造连接对象 76 $db = new MySQLi("localhost","root","123","mydb"); 77 //写SQL语句 78 $sql = "select name from nation where code='{$code}'"; 79 //执行SQL语句 80 $result = $db->query($sql); 81 82 $attr = $result->fetch_row(); 83 84 return $attr[0]; 85 } 86 87 ?> 88 89 90 </table> 91 <a href="add.php"><input type="button" value="添加数据" /></a>