Change Wordpress domain

wp-domain-changer.php

<?php

/*
	WP Domain Changer
	(changing directly in the database)
	http://codex.wordpress.org/Changing_The_Site_URL#Changing_the_URL_directly_in_the_database
	
	Usage:
	browser: http://domainname/wp-domain-changer.php
	commandline: php wp-domain-changer.php http://domainname [path-to-wp-config.php]
*/


if(isset($_SERVER["HTTP_HOST"])){
	$domain = 'http://'.$_SERVER["HTTP_HOST"];
}else if(isset($_SERVER['argv'][1])){
	$domain = $_SERVER['argv'][1];
}else{
	exit('please specify a domain name!');
}
if(strpos($domain, 'http') !== 0){
	exit('domain name "'.$domain.'" is not valid!');
}


if(isset($_SERVER['argv'][2])){
	if(@!include_once($_SERVER['argv'][2]))
		exit($_SERVER['argv'][2].' not found!');
}else if(@!include_once('wp-config.php'))
	exit('wp-config.php not found!');



try{

	$dbh = new PDO('mysql:host='.DB_HOST.';dbname='.DB_NAME, DB_USER, DB_PASSWORD);
	$dbh->exec('SET CHARACTER SET '.DB_CHARSET);

	$sql = 'UPDATE '.$table_prefix.'options
			SET option_value="'.$domain.'"
			WHERE option_name IN ("siteurl", "home")';
	$n = $dbh->exec($sql);

	if($n == 2) echo('domain changed succesfully!');
	else if($n == 1) echo('something weird happens! please update database manually!');
	else{
		$e = $dbh->errorInfo();
		if(isset($e[2])) echo $e[2];
		else echo 'nothing to change!';
	}
	
	$dbh = null;

}catch(Exception $e){
	echo 'Error: '.$e->getMessage();
}


?>