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<?php $array = [null => 42, false => 43]; var_dump(array_key_exists(null, $array)); // true var_dump(array_key_exists('', $array)); // true var_dump(array_key_exists(false, $array)); // true var_dump(array_key_exists(0, $array)); // true var_dump(array_key_exists(0.0, $array)); // true print count($array). " elements in the array\n";
Output for git.master_jit, git.master
bool(true) bool(true) bool(true) bool(true) bool(true) 2 elements in the array

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