MySQL trigger in PHP

[B_Thax]

I need to write a trigger with php but it do not seems to work. Here you got the code:
[b]
$sql_post_incrementor = "
DELIMITER $$
CREATE TRIGGER post_incrementor BEFORE INSERT ON 'ksys_content'
FOR EACH ROW
BEGIN
UPDATE ksys_usr SET posts = posts + 1 WHERE id = 'NEW.author';
END$$
DELIMITER ;";

$res_usr=mysql_query($sql_post_incrementor,$dbd);[/b]

I get that error:
[b]You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near 'DELIMITER $$ CREATE TRIGGER post_incrementor BEFORE INSER[/b]

[fenway]

I assume you're using a trigger-friendly version of MySQL?