Moj problem wyglada nastepujaco.
Robie przyklady z tej ksiazki Head First PHP & MySQL i w drugim rozdziale jest wykonywanie zapytan do bazy.
Robie wszystko dokladnie jak jest podane i nie moze sie polaczyc.
Stwierdzilem, ze odpale ich skrypt (jako, ze ze strony mozna pobrac gotowce) i zobacze co u mnie nie tak, ale w ich skrypcie jest dokladnie tak samo. Tzn. mam ten sam blad:

[PHP] pobierz, plaintext 
<?php
$dbc = mysqli_connect('localhost', 'har', 'har', 'alien')
    or die('Error connecting to MySQL server.');
 
  $query = "INSERT INTO test (first_name, last_name, when_it_happened, how_long, " .
    "how_many, alien_description, what_they_did, fang_spotted, other, email) " .
    "VALUES ('$first_name', '$last_name', '$when_it_happened', '$how_long', '$how_many', " .
    "'$alien_description', '$what_they_did', '$fang_spotted', '$other', '$email')";
 
  $result = mysqli_query($dbc, $query)
    or die('Error querying database.');
 
  mysqli_close($dbc);
?>
[PHP] pobierz, plaintext 

Chyba nieco namieszałeś, w komunikacie błędu jest informacja z funkcji mysql_query, więc proponuję najpierw sprawdzić czy przypadkiem w skrypcie nie masz mysql_query zamiast mysqli_query, gdyż poniższy skrypt który podałeś działa prawidłowo, a problem pojawił się identyczny jak Twój gdy użyłem mysql_query

Tak wyglada formularz

[HTML] pobierz, plaintext 
  <h2>Aliens Abducted Me - Report an Abduction</h2>
  <p>Share your story of alien abduction:</p>
  <form method="post" action="report.php">
    <label for="firstname">First name:</label>
    <input type="text" name="firstname" /><br />
    <label for="lastname">Last name:</label>
    <input type="text" name="lastname" /><br />
    <label for="email">What is your email address?</label>
    <input type="text" name="email" /><br />
    <label for="whenithappened">When did it happen?</label>
    <input type="text" name="whenithappened" /><br />
    <label for="howlong">How long were you gone?</label>
    <input type="text" name="howlong" /><br />
    <label for="howmany">How many did you see?</label>
    <input type="text" name="howmany" /><br />
    <label for="aliendescription">Describe them:</label>
    <input type="text" name="aliendescription" size="32" /><br />
    <label for="whattheydid">What did they do to you?</label>
    <input type="text" name="whattheydid" size="32" /><br />
    <label for="fangspotted">Have you seen my dog Fang?</label>
    Yes <input name="fangspotted" type="radio" value="yes" />
    No <input name="fangspotted" type="radio" value="no" /><br />
    <img src="fang.jpg" width="100" height="175"
      alt="My abducted dog Fang." /><br />
    <label for="other">Anything else you want to add?</label>
    <textarea name="other"></textarea><br />
    <input type="submit" value="Report Abduction" name="submit" />
  </form>
[HTML] pobierz, plaintext 

A tak skrypt

[PHP] pobierz, plaintext 
<?php
  $first_name = $_POST['firstname'];
  $last_name = $_POST['lastname'];
  $when_it_happened = $_POST['whenithappened'];
  $how_long = $_POST['howlong'];
  $how_many = $_POST['howmany'];
  $alien_description = $_POST['aliendescription'];
  $what_they_did = $_POST['whattheydid'];
  $fang_spotted = $_POST['fangspotted'];
  $email = $_POST['email'];
  $other = $_POST['other'];
 
  $dbc = mysqli_connect('localhost', 'har', 'har', 'alien')
    or die('Error connecting to MySQL server.');
 
  $query = "INSERT INTO test (first_name, last_name, when_it_happened, how_long, " .
    "how_many, alien_description, what_they_did, fang_spotted, other, email) " .
    "VALUES ('$first_name', '$last_name', '$when_it_happened', '$how_long', '$how_many', " .
    "'$alien_description', '$what_they_did', '$fang_spotted', '$other', '$email')";
 
  $result = mysqli_query($dbc, $query)
    or die('Error querying database.');
 
  mysqli_close($dbc);
 
  echo 'Thanks for submitting the form.<br />';
  echo 'You were abducted ' . $when_it_happened;
  echo ' and were gone for ' . $how_long . '<br />';
  echo 'Number of aliens: ' . $how_many . '<br />';
  echo 'Describe them: ' . $alien_description . '<br />';
  echo 'The aliens did this: ' . $what_they_did . '<br />';
  echo 'Was Fang there? ' . $fang_spotted . '<br />';
  echo 'Other comments: ' . $other . '<br />';
  echo 'Your email address is ' . $email;
?>
[PHP] pobierz, plaintext 

I nie wazne czy mam mysqli czy mysql to i tak mam ten sam blad.

[PHP] pobierz, plaintext 
<?php
$dbc = mysql_connect('localhost', 'har', 'har', 'alien')
    or die('Error connecting to MySQL server.');
 
  $query = "INSERT INTO test (first_name, last_name, when_it_happened, how_long, " .
    "how_many, alien_description, what_they_did, fang_spotted, other, email) " .
    "VALUES ('$first_name', '$last_name', '$when_it_happened', '$how_long', '$how_many', " .
    "'$alien_description', '$what_they_did', '$fang_spotted', '$other', '$email')";
 
  $result = mysql_query($dbc, $query)
    or die('Error querying database.');
 
  mysql_close($dbc);
?>
[PHP] pobierz, plaintext 

Sprubuj tak:

[PHP] pobierz, plaintext 
<?php
$dbc = mysql_connect('localhost', 'har', 'har') or die('Error connecting to MySQL server.');
mysql_select_db('alien');
 
 $query = "INSERT INTO aliens_abduction (first_name, last_name, when_it_happened, how_long, " .
   "how_many, alien_description, what_they_did, fang_spotted, other, email) " .
   "VALUES ('$first_name', '$last_name', '$when_it_happened', '$how_long', '$how_many', " .
   "'$alien_description', '$what_they_did', '$fang_spotted', '$other', '$email')";
 
 $result = mysql_query($query) or die('Error querying database.');
?>
[PHP] pobierz, plaintext 

Nie dziala, ani jedno ani drugie.

Zobacz tak:

[PHP] pobierz, plaintext 
<?php
 
mysql_connect('localhost', 'har', 'har') or die('Error connecting to MySQL server.');
mysql_select_db('alien');
 
$first_name = $_POST['firstname'];
$last_name = $_POST['lastname'];
$when_it_happened = $_POST['whenithappened'];
$how_long = $_POST['howlong'];
$how_many = $_POST['howmany'];
$alien_description = $_POST['aliendescription'];
$what_they_did = $_POST['whattheydid'];
$fang_spotted = $_POST['fangspotted'];
$email = $_POST['email'];
$other = $_POST['other'];
$query = "INSERT INTO `aliens_abduction` (`first_name`, `last_name`, `when_it_happened`, `how_long`, `how_many`, `alien_description`, `what_they_did`, `fang_spotted`, `other`, `email`) VALUES ('$first_name', '$last_name', '$when_it_happened', '$how_long', '$how_many','$alien_description', '$what_they_did', '$fang_spotted', '$other', '$email')";
 
mysql_query($query) or die('Error querying database.');
?>
[PHP] pobierz, plaintext 

Tez nie dziala 

OK, teraz dziala, jakos sobie poradzilem
Dziex za pomoc