REGEX (search for x OR y -- where both are integers)

[Paul Smith]

Greetings. The problem I have dates back to my sorting Japanese strings problem... which can't really be solved w/ the version/setup of MySQL I'm using. The good side is that PHP can. The solution is to grab all the data that is returned, and have PHP sort it by the Japanese column. After it's sorted, I need to send another query, asking for all the information of the sequence of records I've sorted.

If I'm searching for strings, I'd do something like:
SELECT * FROM table WHERE title REGEXP 'this|that|him|her|them'
...or something along those lines. Since those strings can get rather large, I was hoping to search for it by record ID (integer). If I run:
SELECT * FROM table WHERE title REGEXP '50|233|1200|234|632'
it seems that it'll match any records with those numbers in them.
50,500,5000
233,2331,2332, etc.

Anyway to have a regular expression only return records where the ID equals (not contains) the value in the regex?