Customize allowed file extensions

README.MD

Customization of allowed file extensions for individual DB fields

With the following code you are able to remove file extensions from the list of allowed file extensions in field tx_news_domain_model_news.fal_media. Just edit the array $removeFileExtensionsArray and copy the code into file: EXT:<your_sitepackage>/Configuration/TCA/Overrides/tx_news_domain_model_news.php of your sitepackage.

tx_news_domain_model_news.php

<?php

defined('TYPO3') or die('Access denied.');

/*
 * With the following code you are able to remove file extensions from the list
 * of allowed file extensions in `field tx_news_domain_model_news`.`fal_media`.
 * Just edit the array $removeFileExtensionsArray and copy the code into file:
 * EXT:<your_sitepackage>/Configuration/TCA/Overrides/tx_news_domain_model_news.php
 * of your sitepackage.
 */

call_user_func(static function () {
    /*
     * Array of file extensions that should be removed from the default file extensions list
     */
    $removeFileExtensionsArray = [
        'mp3',
        'wav',
        'mp4',
        'ogg',
        'flac',
        'opus',
        'webm',
        'youtube',
        'vimeo'
    ];

    /*
     * Convert list of default file extensions to array
     */
    $allowedFileExtensionsArray = explode(
        ',',
        $GLOBALS['TYPO3_CONF_VARS']['SYS']['mediafile_ext']
    );

    /*
     * Remove file extensions from default file extensions
     */
    $allowedFileExtensionsArray = array_diff(
        $allowedFileExtensionsArray,
        $removeFileExtensionsArray
    );

    /*
     * Convert array of allowed file extensions back to comma separated list
     */
    $allowedFileExtensions = implode(
        ',',
        $allowedFileExtensionsArray
    );

    /*
     * Apply new list of allowed file extensions to TCA
     */
    \TYPO3\CMS\Core\Utility\ArrayUtility::mergeRecursiveWithOverrule(
        $GLOBALS['TCA']['tx_news_domain_model_news']['columns']['fal_media']['config'],
        [
            'overrideChildTca' => [
                'columns' => [
                    'uid_local' => [
                        'config' => [
                            'appearance' => [
                                'elementBrowserAllowed' => $allowedFileExtensions
                            ]
                        ]
                    ]
                ]
            ],
            'filter' => [
                [
                    'parameters' => [
                        'allowedFileExtensions' => $allowedFileExtensions
                    ]
                ]
            ]
        ]
    );
});