Tips How to Increase Character Limit for Forum Nodes and Titles in Xenforo 2

Compatible XF 2.x versions

1. 2.x

Hello everyone, today I'm going to guide you on how to increase the character limit for categories and post titles in Xenforo.

By default, Xenforo only supports 50 characters for categories and 150 characters for post titles. If you exceed these limits, an error will be displayed

Oops! We ran into some problems. Please enter a value using 50 characters or fewer.
To increase the number of characters, go to phpMyAdmin > SQL and run the following command

ALTER TABLE `xf_node` CHANGE COLUMN `title` `title` VARCHAR(500), CHANGE COLUMN `node_name` `node_name` VARCHAR(500);
ALTER TABLE `xf_thread` MODIFY title varchar(500);
ALTER TABLE `xf_forum` MODIFY last_thread_title varchar(500);

Go to /src/XF/Entity/Node.php
Find

$structure->columns = [
            'node_id' => ['type' => self::UINT, 'autoIncrement' => true, 'nullable' => true],
            'title' => ['type' => self::STR, 'maxLength' => 50,
                'required' => 'please_enter_valid_title', 'api' => true
            ],
            'node_name' => ['type' => self::STR, 'maxLength' => 50, 'nullable' => true, 'default' => null,
                'unique' => 'node_names_must_be_unique',
                'match' => self::MATCH_ALPHANUMERIC_HYPHEN,
                'api' => true
            ],

And change 50 to 500

Go to /src/XF/Entity/Thread.php
Find

$structure->columns = [
            'thread_id' => ['type' => self::UINT, 'autoIncrement' => true, 'nullable' => true],
            'node_id' => ['type' => self::UINT, 'required' => true, 'api' => true],
            'title' => ['type' => self::STR, 'maxLength' => 150,
                'required' => 'please_enter_valid_title',
                'censor' => true,
                'api' => true,
            ],

And change 150 to 500

Go to /src/XF/Entity/Forum.php
Find

'last_thread_title'           => ['type' => self::STR, 'maxLength' => 150, 'default' => ''],

Change 150 to 500

That's it.
Good luck!