Untitled

<?php
/**
 * Created by PhpStorm.
 * User: norma
 * Date: 20.04.2018
 * Time: 10:40
 */

echo '<html>
<head>
<title>Formular</title>
</head>
<body text="#000000" bgcolor="#FFFFFF" link="#FF0000" alink="#FF0000" vlink="#FF0000">
<form action="login.php" method="post">
<table >
<tr>
 <td> E-Mail:</td>
 <td> <input type="Email" name="mail" size="30"></td>
</tr>
<tr>
 <td> Passwort:</td>
 <td> <input type="Password" name="pw" size="30"></td>
</tr>
</table>
<input type="Submit" name="login" value="login">
</form>
</body>
</html>';

if (isset($_POST["pw"])){
$mail = $_POST["pw"];
$pw = hash("sha512", $_POST["pw"]);

$stream = fopen("user.txt", "r");
while (! feof($stream))
{
    $zeile = fgetcsv($stream, null, ",");
    $array[]=$zeile;
}

foreach ($array as $item){
    if ($item[0] == $mail && $item[5] == $pw){
        $_SESSION["benutzer"] = $item[1];
        echo "Sie sind eingeloggt";
        die;
    }
}
echo "Die eingegebenen Daten waren nicht korrekt";
}