Limitting Thread Subject

[RateU]

Note that the max length of thread subject is hard coded in MyBB (by default, it is 85).
We can use Custom Modify Error feature of XThreads to set a lower limit.

Create Custom Thread Fields.

• Title: Maximum Subject
• Key: max_subj
• Applicable Forums: select in which forum(s) we need a lower thread subject length.
• Hide input field on New/edit thread: check
• Hide on Show thread: check
• Editable by / Required Field?: Everyone. Please do not make it required.
• Custom Modify Error
  
  Code:

  <if my_strlen($mybb->input['subject']) > 50 then>Your subject is too long. The maximum characters allowed is 50</if>

  ---

Modify it as your needs.

Now each time users try to post a thread with subject more than 50 characters, there is a nice error messages for them
If we want different length for each forum, just create other similar custom thread fields.