Syntax error please help

[EchoFool]

I have a syntax error when creating a string to my variable, but I don't know how to fix it. Could you help me please!

 

My error is:

Parse error: syntax error, unexpected '[', expecting ')' in C:\xampp\htdocs\register.php on line 137

 

It's relating to this linke

$message = $message. "localhost/activate.php?x=" .mysql_insert_id(['UserID]). "&y=$EmailCode";

in the script below:

 

<?php
$query = "INSERT INTO `tableusers` (Username,Password,Email,CountryID,IP,Gender,RegisterDate,JobTitle,ActivateCode)
				Values ('$Username', '$Password', '$Email', '$Country', '$ip', '$Gender', '$Date', 'Unemployed','$EmailCode')";
	mysql_query($query) or die(mysql_error());
	unset($_SESSION['security_code']);
	if (mysql_affected_rows() == 1) {
	// Send the email.

		$subject = "Welcome";
		$headers = 'From: Admin';
		$message = "Thank you for registering.. To activate your account, please click on this link:\n\n";
		$message = $message. "localhost/activate.php?x=" .mysql_insert_id(['UserID']). "&y=$EmailCode";
		mail($Email, $subject, $message, $headers);
?>

 

Hope you can help me out.

[DarkWater]

Just use mysql_insert_id() with no parameters.

[EchoFool]

Argh, thankyou