当我点击提交按钮时，它没有显示任何错误，也没有响应任何消息。点击后它只会重新加载自己，不会显示任何数据。请回复我错误。
我发现我错过了标签。这是一个愚蠢的错误。
<?php
$server="localhost";
$username="root";
$password="admin007#";
$dbname="demo";
$con=new mysqli($server,$username,$password,$dbname);
if(!$con)
{
die('error connecting to the database');
}
if(isset($_POST['login'])){
$a=mysqli_real_escape_string($con, $_POST['user']);
$b=mysqli_real_escape_string($con, $_POST['pass']);
$sql="SELECT * FROM login WHERE username='$a' AND password='$b'";
$result=mysqli_query($con, $sql);
$check=mysqli_num_rows($result);
if($check>0){
echo "you are logged in";
}
else
{
echo "Error";
}
}
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<body>
<tr>
<td>Username:</td>
<td><input type="text" name="user" value=""/></td>
</tr>
<br /><br />
<tr>
Password:
<td><input type="password" name="pass" value=""/></td>
</tr>
<br />
<tr align="center">
<td colspan="2"><input type="submit" name="login" value="Log In"/></td>
</tr>
</body>
</html>
最佳答案
有一个<form>标签丢失
<body>
<form action="#" method="post">
<tr>
<td>Username:</td>
<td>
<input type="text" name="user" value="" />
</td>
</tr>
<br />
<br />
<tr>
Password:
<td>
<input type="password" name="pass" value="" />
</td>
</tr>
<br />
<tr align="center">
<td colspan="2">
<input type="submit" name="login" value="Log In" />
</td>
</tr>
</form>
</body>
关于php - 创建登录页面但单击按钮不显示任何数据或错误消息，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40127030/