3v4l.org

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Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.19, 8.4.1 - 8.4.5
array ( 'a:ab' => '', 'ab:a' => 'b', '0:1' => '0', '1:0' => '1', ) --- array ( 'udiff' => array ( 'four' => '1', ), 'uintersect' => array ( 'one' => 'a', 'two' => 'ab', 'three' => '0', ), )

preferences:
136.91 ms | 412 KiB | 5 Q