why i get a syntax error?

[donkru]

<?php
// include.php
//Database Info
global $db_host = 'localhost';	//mySQL location <--- line 4
global $db_user = 'user';		//mySQL server Username
global $db_pass = 'password';		//mySQL server password
global $db_data = 'database';		//mySQL database

// connect to a mySQL server
function connectdb(){
		$link = mysql_connect($db_host, $db_user, $db_pass);
	if(!$link){
		echo 'There was an error conecting to mySQL server on ' . $db_host . ' with username ' . $db_user . '.<p>' . mysql_error();
		exit();}
		$dbsel = mysql_select_db($db_data);
	if(!$dbsel){
		echo 'There was an error selecting database ' . $db_data . ' on ' . $db_host . '.<p>' . mysql_error();
		exit();} 
}
?>

i get this error
Parse error: syntax error, unexpected '=', expecting ',' or ';' in C:\path\to\folde\sub1\sub2\include.php on line 4

can you help
im useing php5

[donkru]

well i fixed it thanx any way

$db_host = 'localhost';	//mySQL location
$db_user = 'user';		//mySQL server Username
$db_pass = 'password';		//mySQL server password
$db_data = 'database';		//mySQL database

// connect to a mySQL server
function connectdb(){
	global $db_host, $db_user, $db_pass, $db_data;
		$link = mysql_connect($db_host, $db_user, $db_pass);
	if(!$link){
		echo 'There was an error conecting to mySQL server on ' . $db_host . ' with username ' . $db_user . '.<p>' . mysql_error();
		exit();}
		$dbsel = mysql_select_db($db_data);
	if(!$dbsel){
		echo 'There was an error selecting database ' . $db_data . ' on ' . $db_host . '.<p>' . mysql_error();
		exit();} 
}