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<?php var_dump(array( '0 == "one"' => (0 == "one"), '0 == "null"' => (0 == "null"), '0 == "1"' => (0 == "1"), '0 == "0"' => (0 == "0"), '0 == ""' => (0 == ""), ));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(5) { ["0 == "one""]=> bool(true) ["0 == "null""]=> bool(true) ["0 == "1""]=> bool(false) ["0 == "0""]=> bool(true) ["0 == """]=> bool(true) }