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<?php function t($t) { switch ($t) { case 'a': return 'a'; case 'b': return 'b'; case 'c': return 'x'; default: return 'xx'; } return null; } var_dump(t('a'));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(1) "a"