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<?php $array = array('foo' => 'bar', 'rab' => 'oof'); var_dump(array_count_values($array));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(2) { ["bar"]=> int(1) ["oof"]=> int(1) }