Problème pour inclure ma base de donnée dans mon fichier d'installation

<?php
if(isset($_POST['settings'])) {
	if(empty($_POST['sitename']) ||  empty($_POST['siteurl']) || empty($_POST['slogan']) || empty($_POST['pagination']) || empty($_POST['password'])) {
		echo 'Sorry, one or more fields was left empty.';
	} else {
		if(!ctype_digit($_POST['pagination'])) {
			echo 'Sorry, pagination MUST be a number';
		} else {
			if(!is_writable('../thumbnails/') || !is_writable('../files/')) {
				echo 'Sorry, thumbnail folder and files folder must be chmodded to 777.';
			} else {
			
			include('../inc/config.php');
			
			// Create settings table
		
				$query = mysql_query;include ('sql.sql');

				echo 'Ads table created!<br /><br />';
				
				
			}
		}
	}
} elseif(isset($_GET['settings'])) {
	echo '<form name="settings" method="post" action="index.php">

	Nom du site:<br />
	<input type="text" name="sitename" /><br />
	Site URL:<br />
	<input type="text" name="siteurl" /><br />
	Site Slogan:<br />
	<input type="text" name="slogan" /><br />
	Non d\'utilisateur:<br/>

	<input type="text" name="username" /><br/>
	Mot de passe admin:<br />
	<input type="password" name="password" /><br />
	Adresse E-mail:
	<input type="text" name="mail" /><br />
	Votre Copyright:
	<input type="text" name="copyright" /><br/><br/>
	<input type="submit" name="settings" value="Valider" />
	</form>';

} elseif(isset($_POST['database'])) {
	if(empty($_POST['host']) || empty($_POST['dbuser']) || empty($_POST['dbname']) || empty($_POST['dbpassword'])) {
		echo 'Sorry, one or more fields was left empty.';
	} else {
		$config = "../inc/config.php";
		if(!is_writable($config)) {
			die("Error: Config file not CHMODDED");
		} else {
			$connect = @mysql_connect($_POST['host'], $_POST['dbuser'], $_POST['dbpassword']);
			$database = @mysql_select_db($_POST['dbname']);
			
			if($connect === false || $database === false) {
				echo 'Could not connect to the database';
			} else {
				$fh = fopen($config, 'w') or die("can't open file");
				$stringData = '<?php

$host = "' . $_POST['host'] . '";
$database = "' . $_POST['dbname'] . '";
$username = "' . $_POST['dbuser'] . '";
$password = "' . $_POST['dbpassword'] . '";

mysql_connect($host, $username, $password);
mysql_select_db($database) or die("Cannot connect to the database");
?>';
				fwrite($fh, $stringData);
				fclose($fh);
				echo 'Config created successfully.<br /><a href="?settings=true">Click here to proceed!</a>
				';
			}
		}
	}
} else {
	echo '
	<h2>Bienvenue sur CMS-Rencontre!</h2>
	<p>Please ensure that you have chmodded the /inc/config.php file and the files and thumbnails folder to 777, otherwise the script will not install.</p>
	<form name="database" method="post" action="index.php">
	Host:<br />
	<input type="text" name="host" /><br />
	DB Name:<br />
	<input type="text" name="dbname" /><br />
	DB Username:<br />
	<input type="text" name="dbuser" /><br />
	DB Passowrd:<br />
	<input type="text" name="dbpassword" /><br /><br />
	<input type="submit" name="database" value="Go" />
	</form>';
} ?>