<?php
defined('TYPO3') or die();

// Force imageorient to only have items 25 and 26
$GLOBALS['TCA']['tt_content']['columns']['imageorient']['config'] = [
    'type' => 'select',
    'renderType' => 'selectSingle',
    'items' => [
        ['LLL:EXT:base/Resources/Private/Language/locallang_db.xlf:imageorient.25', 25],
        ['LLL:EXT:base/Resources/Private/Language/locallang_db.xlf:imageorient.26', 26],
    ],
];