[PHP]Einfache SQlite Passwort Abfrage

function _user_valid($usr,$pw,$hash_opt = 1){
	if ($hash_opt = 1){$pw = hash('sha256',$pw);}
	$db = sqlite_open("db.db", 0666, $error)
   or die("Error: $error");
   $eingabe = "select name, hash from user where name='$usr'";
   $doit = sqlite_query($db, $eingabe);
  if (!$doit) { 
    $result = 0; 
  }
  else
  {		$result = 0;
	  while ($row = sqlite_fetch_array($doit)) {
		  if ($pw == $row["hash"] and $usr == $row["name"]) {$result = 1;} else{$result = 0;}
		  }}
      sqlite_close($db);
	return $result; 

}