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<?php function func(&$a) { // void(); } $a['one'] = 1; //func($a['two']); var_dump($a); ?>
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(1) { ["one"]=> int(1) }