php登录脚本无法加载[关闭]

Question

I'm new to php and i need help with this code, because i get "HTTP-fout 500 (Internal Server Error):" when i try to load it. Could someone post the whole good code. thanks.

  <?php
session_start();


if(empty($_POST['username']) || empty($_POST['password'])) {
$notifications[] = 'Login failed! Please provide a username and password.';
   }

   if(count($notifications) == 0) {
try {
    $dbh = new PDO('mysql:dbname=####;host=####',   
'####', '####');

    $sql = "SELECT username, verified FROM users WHERE username = :username AND    
password = :password";
    $sth = $dbh->prepare($sql);
    $sth->execute(array(
        ':username'    => $_POST['username'],
        ':password' => md5($_POST['password'])
    ));

    $result = $sth->fetch(PDO::FETCH_ASSOC);

    if($result) {
        // Set session details and redirect user to members page
        session_regenerate_id();
    $_SESSION['username']=':username';
    $_SESSION['password']=':password';

        header('Location: index.php');
    } else {
        $notifications[] = "Username or Password incorrect.";
    }
    ?>

Answer 1

You are missing a few curly braces. Not sure if this is the cause of your issue but try this out. The third and forth lines added set the error reporting to display on the current page instead of logging it to file / syslog / etc.

<?php
session_start();
ini_set('display_errors', true);
error_reporting(E_ALL);

if(empty($_POST['username']) || empty($_POST['password'])) {
    $notifications[] = 'Login failed! Please provide a username and password.';
}

if(count($notifications) == 0) {
    try {
        $dbh = new PDO('mysql:dbname=####;host=####','####', '####');
        $sql = "SELECT username, verified FROM users WHERE username = :username AND password = :password";
        $sth = $dbh->prepare($sql);
        $sth->execute(array(
            ':username'    => $_POST['username'],
            ':password' => md5($_POST['password'])
        ));

        $result = $sth->fetch(PDO::FETCH_ASSOC);

        if($result) {
            session_regenerate_id();
            $_SESSION['username']=':username';
            $_SESSION['password']=':password';

            header('Location: index.php');
        } else {
            $notifications[] = "Username or Password incorrect.";
        }
    }
}
?>