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<?php $false = false; $test = array(); $test['parent'] = array(); $test['parent']['child'] = 'foo'; var_dump(isset($test['parent']['child'])); $test['parent'][$false] = 'bar'; var_dump(isset($test['parent']['child'])); var_dump($test);
Output for git.master, git.master_jit, rfc.property-hooks
bool(true) bool(true) array(1) { ["parent"]=> array(2) { ["child"]=> string(3) "foo" [0]=> string(3) "bar" } }

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