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<?php $a = 1; function test() { global $a; $b = 2; var_dump(compact('a', 'b')); } test();
based on YD8Qc
Output for 4.3.0 - 5.6.28, 7.0.4 - 7.1.0
array(2) { ["a"]=> int(1) ["b"]=> int(2) }
Output for 7.0.0 - 7.0.3
array(2) { ["a"]=> &int(1) ["b"]=> int(2) }