PHP MYSQL登陆和模糊查询

PHP MYSQL登陆和模糊查询

 

PHP版本 5.5.12    MYSQL版本 5.6.17  Apache 2.4.9 用的wampserver

一、PHPMYSQL实现登陆： 

一共含有两个文件：login.php和logincheck.php;

表单代码：

<form action="logincheck.php"method="post">
 
         Yonghu:<inputtype="text" name="username" />
 
   <br />
 
   Mima:<input type="password" name="password" />
 
   <br />
 
   <input type="submit" name="submit" value="登陆" ahref="logincheck.php" />
 
   &nbsp;&nbsp;&nbsp;&nbsp;
 
   <a href="register.php">zhuce:</a>
 
</form>

后台处理代码：

<?php
 
         if(isset($_POST["submit"])&& $_POST["submit"] == "登陆")
 
         {
 
                   $user= $_POST["username"];
 
                   $psw= $_POST["password"];
 
                   if($user== "" || $psw == "")
 
                   {
 
                            echo"<script>alert('请输入用户名或密码！'); history.go(-1);</script>";
 
                   }
 
                   else
 
                   {
 
                            $link= mysqli_connect('localhost', 'sa', '123456','account');//链接数据库
 
                            mysqli_select_db($link,"account");
 
                            mysqli_query($link,'setname utf8');
 
                            $sql= "selectuser from zhanghu where user = '$_POST[username]'";
 
                            $result=mysqli_query($link,$sql)or die("Failed".mysql_error());
 
                            if($num=mysqli_num_rows($result))
 
                            {
 
                                     $row= mysqli_fetch_array($result);       //将数据以索引方式储存在数组中
 
                                     echo"welcome ";
 
                                     echo$row[0];
 
                            }
 
                            else
 
                            {
 
                                     echo"<script>alert('用户名或密码不正确！');history.go(-1);</script>";
 
                            }
 
                   }
 
         }
 
         else
 
         {
 
                   echo"<script>alert('Submit Failed!');history.go(-1);</script>";
 
         }
 
?>

 

Account数据库内容：

二、PHPMYSQL实现模糊查询

查询数据库（只给PHP的代码）：

<?php
 
         $mysqli=newmysqli();                         
 
         $mysqli->connect("localhost","sa", "123456");
 
         if(mysqli_connect_errno()) {
 
                   printf("Failllllll:%s\n", mysqli_connect_error());
 
                   exit();
 
         }
 
         $mysqli->select_db("booklib");   
 
         $mysqli->query("SETNAMES utf8");      
 
         $rsbooks= $mysqli->query("select * from books where Name like'%$_POST[bookname]%'");
 
   $row_rsbooks = $rsbooks->fetch_assoc();
 
   $totalRows_rsbooks = $rsbooks->num_rows;       
 
?> Totel
 
<?php echo $totalRows_rsbooks ?>books;
 
<table width="600"border="1">
 
 <tr>
 
   <td bgcolor="#99CCFF"align="center">Name</td>
 
   <td bgcolor="#99CCFF" align="center">ISBN</td>
 
   <td bgcolor="#99CCFF"align="center">Store</td>
 
   <td bgcolor="#99CCFF"align="center">Do</td>
 
 </tr>
 
 <?php do { ?>
 
   <tr>
 
     <td><?php echo $row_rsbooks['Name']; ?></td>
 
     <td><?php echo $row_rsbooks['ISBN']; ?></td>
 
     <td><?php echo $row_rsbooks['Store']; ?></td>
 
     <td><fontcolor="#110BAA">rent</font></td>
 
   </tr>
 
   <?php } while ($row_rsbooks = $rsbooks->fetch_assoc()); ?>
 
</table>
 
<?php
 
 $rsbooks->close(); 
 
 $mysqli->close();
 
?>

数据库表的内容如下：

查询：

 

结果：