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<?php $chunk_size = 2; $sequences = array('a','b','c','d','e'); while(count($sequences) > 0){ $small_chunk = array_slice($sequences, 0, $chunk_size); $sequences = array_slice($sequences, $chunk_size); print_r($small_chunk); print_r($sequences); }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => a [1] => b ) Array ( [0] => c [1] => d [2] => e ) Array ( [0] => c [1] => d ) Array ( [0] => e ) Array ( [0] => e ) Array ( )

preferences:
252.77 ms | 406 KiB | 310 Q