3v4l.org

run code in 300+ PHP versions simultaneously
<?php class foo { public $newfunc; public function __construct() { $this->newfunc = create_function('$a,$b','print "ln($a) + ln($b) = ".log($a * $b);'); call_user_func(array($this, $this->newfunc), 1, 2); $this->$newfunc(1, 2); } } $f = new foo();

preferences:
49.05 ms | 402 KiB | 5 Q