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<?php var_export( preg_split( '~\D+\d{4}\K~', 'ABCDE1234ABCD1234ABCDEF1234', 0, PREG_SPLIT_NO_EMPTY ) );
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array ( 0 => 'ABCDE1234', 1 => 'ABCD1234', 2 => 'ABCDEF1234', )
preferences:
114.79 ms | 1496 KiB | 4 Q