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run code in 300+ PHP versions simultaneously
<?php error_reporting(E_ALL); class a { function a() { echo "CONSTRUCTOR CALLED\r\n"; } function b($var) { return $var . 'x'; } } print_r(array_map(array('a', 'b'), array('a', 'b')));

preferences:
40.37 ms | 402 KiB | 5 Q