Query was empty ?? (Opgelost)

<?php
if ($_SERVER['request_method'] == "POST") {
$naam_vak = $_POST ['naam_vak'];
$query = "CREATE TABLE '".$naam_vak."' (
id int( 11 ) NOT NULL auto_increment PRIMARY KEY
naam_vak VARCHAR(100) NOT NULL );";
mysql_query($_query) or die (mysql_error());
?>

<?php
if ($_SERVER['request_method'] == "POST") {
$naam_vak = $_POST ['naam_vak'];
$query = "CREATE TABLE '".$naam_vak."' (
id int( 11 ) NOT NULL auto_increment PRIMARY KEY
naam_vak VARCHAR(100) NOT NULL );";
mysql_query($_query) or die (mysql_error());
?>

error_reporting(E_ALL);
ini_set('display_errors', true);

error_reporting(E_ALL);
ini_set('display_errors', true);