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" />
<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：
