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<?php var_dump(preg_split('/([ -])/', 'test', -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY));
Output for 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
array(1) { [0]=> string(4) "test" }
preferences:
32.2 ms | 864 KiB | 4 Q