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run code in 300+ PHP versions simultaneously
<?php error_reporting(0); class a { static $a = 4; function a() { echo self::$a; } function b($var) { return $var . 'x'; } } print_r(array_map(array('a', 'b'), array('a', 'b')));

preferences:
45.11 ms | 402 KiB | 5 Q