Different variables after using password_hash()

Question

I've been trying to do some security on my log in website and in the internet i found this function password_hash(). I don't know why but I can't log in. I'm using db.

---

$haslo1 = $_POST['haslo1'];
$haslo_hash = password_hash($haslo1, PASSWORD_DEFAULT);
if ($wszystko_OK == true) {
                    if ($polaczenie -> query("INSERT INTO uzytkownicy VALUES (NULL, '$nick', '$haslo_hash', '$email', 100, 100, 100, 14)")) {
                        $_SESSION['udanarejestracja'] = true;
                        header('Location: witamy.php');
                    } else {
                        throw new Exception($polaczenie -> error);
                    }
                }

---

$haslo = $_POST['haslo'];
if (password_verify($haslo, $wiersz['pass'])) {
   ....
}

---

I checked the output variable by this code and find out that $haslo_hash1 and $haslo_hash2 are different:

<?php
    $haslo = "qwerty123";

    $haslo_hash1 = password_hash($haslo, PASSWORD_DEFAULT);
    $haslo_hash2 = password_hash($haslo, PASSWORD_DEFAULT);

    if ($haslo_hash1 == $haslo_hash2) {
        echo "Jest okej<br>";
        echo "$haslo_hash1<br>";
        echo $haslo_hash2;
    } else {
        echo "to sa inne hasla po hashu<br>";
        echo "$haslo_hash1<br>";
        echo $haslo_hash2;
    }
?>

---

Could you help me to fing solution?

Answer 1

$haslo = "qwerty123";
$haslo_hash1 = password_hash($haslo, PASSWORD_DEFAULT); // some hashed code generated for your password
$haslo_hash2 = password_hash($haslo, PASSWORD_DEFAULT); // some different hash code generated for your password

if ($haslo_hash1 == $haslo_hash2) { // it will never be true
    echo "Jest okej<br>";
    echo "$haslo_hash1<br>";
    echo $haslo_hash2;
} else {
    echo "to sa inne hasla po hashu<br>";
    echo "$haslo_hash1<br>";
    echo $haslo_hash2;
}

To verify, try it like this:

$haslo = "qwerty123";
$haslo_hash1 = password_hash($haslo, PASSWORD_DEFAULT);

if (password_verify($haslo, $haslo_hash1)) {  
    echo $haslo_hash1;
} else {
    echo 'error';
}

Same goes for $haslo_hash2