TYPO3 Core

It seems to be encouraged by the TYPO3 CMS core team to use "bool" and not "boolean" in PHPDoc block type hints. The TYPO3 CMS core team itself uses the "PHPCodesniffer Fixer" to automatically replace those "boolean" with "bool" in PHPDoc blocks on a regular base. This tool uses "Build/.php_cs" as a configuration file and the option "phpdoc_scalar" makes sure that every "boolean" used in a PHPDoc block type hints is replaced by a "bool".

EXT:scheduler can execute "Extbase CommandController Tasks". You can pass arguments to that tasks. The user interface can be influenced by using @param annotations/typehints in the PHPDoc block of the task's method to be executed.

<?php
namespace Lorem\Ipsum\Command;

use TYPO3\CMS\Extbase\Mvc\Controller\CommandController;

class FoobarCommandController extends CommandController
{
    /**
     * @param boolean $foo
     * @param bool $bar
     * @return void
     */
    public function updateCommand($foo = false, $bar = false)
    {
        // Do something!
    }
}

Up to now if you wanted to use a checkbox you had to use "boolean" in that typehint.