nostadt

<?php

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

(function () {
    $iconRegistry = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Imaging\IconRegistry::class);
    // Icons from: https://fontawesome.com/v3.2.1/icons/
    foreach (['shopping-cart', 'search'] as $icon) {

nostadt

<?php

namespace Vendor\MyExt\Form\Element;

use TYPO3\CMS\Backend\Form\Element\SelectSingleElement;
use TYPO3\CMS\Backend\Form\InlineStackProcessor;
use TYPO3\CMS\Backend\Form\Utility\FormEngineUtility;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Core\Utility\StringUtility;

nostadt

<?php
$connection = GeneralUtility::makeInstance(ConnectionPool::class)->getConnectionForTable('tx_foo_yourtable');
$connection->transactional(function (Connection $connection) {
        // Perform transactional queries here
});

// Code from Mathias wild Brodala. For quick reference I created a gist.