MySQL Workbench 6.2 create function - php

Question

I'm trying to create a function in MySQL workbench, I have this SQL code:
DELIMITER $$
CREATE FUNCTION `regex_replace` (pattern VARCHAR(1000),replacement VARCHAR(1000),original VARCHAR(1000))
RETURNS VARCHAR(1000)
DETERMINISTIC
BEGIN
DECLARE temp VARCHAR(1000);
DECLARE ch VARCHAR(1);
DECLARE i INT;
SET i = 1;
SET temp = '';
IF original REGEXP pattern THEN
loop_label: LOOP
IF i>CHAR_LENGTH(original) THEN
LEAVE loop_label;
END IF;
SET ch = SUBSTRING(original,i,1);
IF NOT ch REGEXP pattern THEN
SET temp = CONCAT(temp,ch);
ELSE
SET temp = CONCAT(temp,replacement);
END IF;
SET i=i+1;
END LOOP;
ELSE
SET temp = original;
END IF;
RETURN temp;
END;
$$
DELIMITER ;
When I put this in phpMyAdmin, my function is created without any problems.
When I click on "Add Routine" in MySQL Workbench and then paste this code, I get this error:
Syntax error: 'DELIMITER' (identifier) is not valid input at this position
I'm no expert on MySQL functions, so I don't really know what to do with this. What is the problem here?
I really want to fix this, because MySQL Workbench now shows my function as _SYNTAX_ERROR instead of regex_replace.

Answer 1

When using the builtin procedure editor, MySQL Workbench adds a few extra commands:
USE `test`; // <----------
DROP procedure IF EXISTS `p2`; // <----------
DELIMITER $$
USE `test`$$ // <----------
CREATE PROCEDURE test.`p2` ()
LANGUAGE SQL
DETERMINISTIC
COMMENT 'Adds "nson" to first and last names in the record.'
BEGIN
SELECT 'Hello World';
END $$
DELIMITER ; // <----------
If you apply the above slashes to your procedure, it should help :)
For reference:
Stored Procedures Using MySQL Workbench