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<?php function directly($array) { $key = 'foo'; return isset($array[$key]); } function byreference(&$array) { $key = 'foo'; return isset($array[$key]); } $array = array( 'foo' => NULL, ); echo directly($array) ? 'truthy' : 'falsey'; echo "\n"; echo byreference($array) ? 'truthy' : 'falsey';
Output for git.master, git.master_jit, rfc.property-hooks
falsey falsey

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