如何在MySQL中保存密码的哈希值

Question

I have the following table in my database called db_pass:

id | pass
=================
1  | dalmation123

I understand that I cannot store any password in plain text format in my database, how do I go about setting up a hash? This is the code I am using below. I would appreciate some help on how to change my table db_pass as well.

if(isset($_POST['pmsubmit']))
{
  LoginSubmit('pm', 'pmname', 'pmpass');
}

if(isset($_POST['tssubmit']))
{
  LoginSubmit('ts', 'dept', 'tspass');
}

function LoginSubmit($pm_or_ts, $the_name_input, $the_pass_input)
{
  global $pdo;
  $posted_name = $_POST[$the_name_input];
  $posted_pass = $_POST[$the_pass_input];
  // check if password matches the one in the table
  $query = $pdo->prepare("SELECT * FROM db_pass WHERE pass = :pass");
  $query->execute(array(":pass" => $posted_pass));
  // if there is a match then we log in the user
  if ($query->rowCount() > 0)
  {
    // session stuff
    $_SESSION[$the_name] = $posted_name;
    // refresh page
    header( 'Location: ' . $pm_or_ts . '/index.php' ) ;
    exit;
  } 
  // if there is no match then we present the user with an error
  else
  {
    echo "error";
    exit;
  }
}

Answer 1

$query = $pdo->prepare("SELECT * FROM db_pass WHERE pass = :pass");
$query->execute(array(":pass" => crypt($posted_pass)));

Don't ask me which algorithm crypt actually uses. The manual entry is totally nonsensical - apparently just checking the value of a constant changes the algorithm used by crypt() which is ridiculous ....

And it's alright people saying bcrypt. But bcrypt isn't a core PHP function. If they mean write your own, then it's a stupid idea - because your implementation would undoubtedly have flaws. If they mean a library they need to point one out - PHPass is commonly recommended, but I have no knowledge to recommend it myself.

It's hardly surprising most people still use sha1 is it?