我无法使用sha1更新mysql数据库中的密码（php忘记了密码系统）

Question

First of all I'm very new to PHP so don't be to hard on me. I'm trying to make a forgot password system for my website, but I can't update the password in the mysql database with sha1. If I do it before sha1 encrypting it works(commented out query in the code)

What I want is to receive a random password on the users mail, but in the database I want it to be encrypted with sha1.

Could really use some help here.

<?php

include("connect.php");

    if(isset($_POST["email"])) {
        $email = $con->real_escape_string($_POST["email"]);

        $data = $con->query("SELECT * FROM bruker WHERE ePost='$email'");

        if ($data->num_rows > 0) {
            $str = "0123456789qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM";
            $str = str_shuffle($str);
            $str = substr($str, 0, 15);

            $passwordD = $str;

            //$con->query("UPDATE bruker SET passord = '$passwordD' WHERE ePost='$email'");

            echo $passwordD;

            $url = "http://localhost/example";

            $msg = "Your new password is: $passwordD\nTo change your password, please visit this: $url";
            $subject = "Reset Password";
            $headers = "From: Vikerfjell" . "\r\n";

            mail($email, $subject, $msg, $headers);

            $salt = 'IT2_2017';
            $passwordE = sha1($salt.$passwordD);

            echo $passwordE;

            $con->query("UPDATE bruker SET passord = '$passwordE' WHERE ePost='$email''");

        } else {
            echo "Please check your link:";
        }



    } else {
        header("Location: index.php");
    }

mysqli_close($con);

?>

Answer 1

  <form name="form" action="" method="post">
  <input type="text" name="email"  value="">
  <input type="submit" name="update password" />
  </form 

check the form method in the first then remove the single qoute in this line of code to be as shwon

$con->query("UPDATE bruker SET passord = '$passwordE' WHERE ePost='$email' ");

Note: the mail function will not work on the localhost