3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Field { const READ = 1; const WRITE = 2; private $name; private $readWriteMask; public function __construct($name, $readWriteMask = self::READ | self::WRITE) { $this->name = (string) $name; $this->readWriteMask = $readWriteMask; } public function getName() { return $this->name; } public function isReadable() { return $this->readWriteMask & self::READ; } public function isWritable() { return $this->readWriteMask & self::WRITE; } } $a = new Field('a'); var_dump($a->isReadable()); var_dump($a->isWritable());

preferences:
43.8 ms | 402 KiB | 5 Q