I got this error when I tried to run that code.
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ''[INDENT]''') FROM
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ''[INDENT]''') FROM
mybb_posts
WHERE message
LIKE '%[INDENT]%'' at line 1