ext_tables.php

<?php
if (!defined('TYPO3_MODE')) {
    die ('Access denied.');
}

// Create array with columns
$tempColumns = array (
    'tx_jhopengraphprotocol_ogtitle' => array (
        'exclude' => 1,
        'label' => 'LLL:EXT:' . $_EXTKEY . '/Resources/Private/Language/locallang.xml:pages.tx_jhopengraphprotocol_ogtitle',
        'config' => array (
            'type' => 'input',
            'size' => '30',
        )
    ),
    'tx_jhopengraphprotocol_ogtype' => array (
        'exclude' => 1,
        'label' => 'LLL:EXT:' . $_EXTKEY . '/Resources/Private/Language/locallang.xml:pages.tx_jhopengraphprotocol_ogtype',
        'config' => array (
            'type' => 'input',
            'size' => '30',
        )
    ),
    'tx_jhopengraphprotocol_ogimage' => array (
        'exclude' => 1,
        'label' => 'LLL:EXT:' . $_EXTKEY . '/Resources/Private/Language/locallang.xml:pages.tx_jhopengraphprotocol_ogimage',
        'config' => array (
            'type' => 'group',
            'internal_type' => 'file',
            'allowed' => $GLOBALS['TYPO3_CONF_VARS']['GFX']['imagefile_ext'],
            'max_size' => $GLOBALS['TYPO3_CONF_VARS']['BE']['maxFileSize'],
            'uploadfolder' => 'uploads/tx_jhopengraphprotocol',
            'show_thumbs' => 1,
            'size' => 4,
            'minitems' => 0,
            'maxitems' => 6,
        )
    ),
	'tx_jhopengraphprotocol_ogfalimages' => array(
		'exclude' => 1,
		'label'	=> 'LLL:EXT:' . $_EXTKEY . '/Resources/Private/Language/locallang.xml:pages.tx_jhopengraphprotocol_ogimage',
		'config' => \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::getFileFieldTCAConfig(
			'tx_jhopengraphprotocol_ogfalimages',
			array(
				'appearance' => array(
					'enableControls' => array(
						'sort' => TRUE,
					),
				),
				'foreign_types' => array(
					'0' => array(
						'showitem' => '
						--palette--;;opengraphprotocolPalette,
						--palette--;;filePalette'
					),
					\TYPO3\CMS\Core\Resource\File::FILETYPE_IMAGE => array(
						'showitem' => '
						--palette--;;opengraphprotocolPalette,
						--palette--;;filePalette'
					),
					\TYPO3\CMS\Core\Resource\File::FILETYPE_APPLICATION  => array(
						'showitem' => '
						--palette--;;opengraphprotocolPalette,
						--palette--;;filePalette'
					),
				),
			),
        	$GLOBALS['TYPO3_CONF_VARS']['GFX']['imagefile_ext']
		),
	),
    'tx_jhopengraphprotocol_ogdescription' => array (
        'exclude' => 1,
        'label' => 'LLL:EXT:' . $_EXTKEY . '/Resources/Private/Language/locallang.xml:pages.tx_jhopengraphprotocol_ogdescription',
        'config' => array (
            'type' => 'input',
            'size' => '30',
            'max' => '100',
        )
    ),
);

// Add columns to TCA of pages and pages_language_overlay
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTCAcolumns('pages',$tempColumns,1);
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addToAllTCAtypes('pages','--div--;LLL:EXT:' . $_EXTKEY . '/Resources/Private/Language/locallang.xml:pages.tab_title,tx_jhopengraphprotocol_ogtitle;;;;1-1-1, tx_jhopengraphprotocol_ogtype, tx_jhopengraphprotocol_ogfalimages, tx_jhopengraphprotocol_ogdescription');

\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTCAcolumns('pages_language_overlay',$tempColumns,1);
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addToAllTCAtypes('pages_language_overlay','--div--;LLL:EXT:' . $_EXTKEY . '/Resources/Private/Language/locallang.xml:pages.tab_title,tx_jhopengraphprotocol_ogtitle;;;;1-1-1, tx_jhopengraphprotocol_ogtype, tx_jhopengraphprotocol_ogfalimages, tx_jhopengraphprotocol_ogdescription');

// Add static file
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addStaticFile($_EXTKEY, 'Configuration/TypoScript', 'Open Graph protocol');

// Add new palette
$GLOBALS['TCA']['sys_file_reference']['palettes']['opengraphprotocolPalette'] = $GLOBALS['TCA']['sys_file_reference']['palettes']['basicoverlayPalette'];
$GLOBALS['TCA']['sys_file_reference']['palettes']['opengraphprotocolPalette']['showitem'] = '';

?>