直入主题,先看php校验登录名和密码是否正确的代码:
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<? 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" /></ p >
echo '< p >< img src = "student_images/' . $row['class'] . '/' . $row['student_nbr'] . '.jpg" /></ 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 >
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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。