php+MySQL实现登录时验证登录名和密码是否正确，mysql登录名
- WBOYOriginal
- 2016-06-13 08:40:201576browse
php+MySQL实现登录时验证登录名和密码是否正确，mysql登录名
直入主题，先看php校验登录名和密码是否正确的代码：
<?php
$servername = "服务器名";
$username = "账户名";
$password = "密码";
$dbname = "数据库名";
?>
<?php
// Session需要先启动。
session_start();
//判断uname和pwd是否赋值
if(isset($_POST['uname']) && isset($_POST['pwd'])){
$name = $_POST['uname'];
$pwd = $_POST['pwd'];
//连接数据库
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
//验证内容是否与数据库的记录吻合。
$sql = "SELECT * FROM test_students_all WHERE (student_name='$name') AND (password='$pwd')";
//执行上面的sql语句并将结果集赋给result。
$result = $conn->query($sql);
//判断结果集的记录数是否大于0
if ($result->num_rows > 0) {
$_SESSION['user_account'] = $name;
// 输出每行数据
while($row = $result->fetch_assoc()) {
echo '<p>' . $row['student_nbr'] . '<br/>' . $row['student_name'] . '(' . $row['sex'] . ')' . '<br/>' . $row['class'] . '<br/>' . $row['major'].'</p>';
// <p><img src="student_images/CLASS/STUDENT_NBR.jpg" / alt="php+MySQL实现登录时验证登录名和密码是否正确，mysql登录名" ></p>
echo '<p><img src="student_images/' . $row['class'] . '/' . $row['student_nbr'] . '.jpg" / alt="php+MySQL实现登录时验证登录名和密码是否正确，mysql登录名" ></p>';
}
} else {
echo "没有您要的信息";
}
$conn->close();
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>登录校验</title>
</head>
<body>
<p>
<?php
// isset(xx) 测试xx是否设置了
if(isset($_SESSION['user_account'])){
echo '你好，' . $_SESSION['user_account'];
}
else{
echo '游客';
}
//$conn->close();
?>
</p>
<form method="POST">
<input type="text" name="uname" placeholder="用户名" />
<br />
<input type="password" name="pwd" placeholder="密码" />
<br />
<input type="submit">
</form>
</body>
</html>
效果图：
以上就是本文的全部内容，希望对大家学习php程序设计有所帮助。
Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：php上传图片类及用法示例，Next article：php反射类ReflectionClass用法分析，reflectionclass用法