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<?php var_dump(preg_split('/-/', '', '-1', PREG_SPLIT_NO_EMPTY));
Output for 8.1.32, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
array(0) { }
preferences:
65.4 ms | 406 KiB | 5 Q