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<?php for ($i = 0; $i <= 12; $i++) { $months[] = date("m/Y", strtotime( date( 'Y-m-01' )." -$i months")); } print_r($months);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Array ( [0] => 07/2017 [1] => 06/2017 [2] => 05/2017 [3] => 04/2017 [4] => 03/2017 [5] => 02/2017 [6] => 01/2017 [7] => 12/2016 [8] => 11/2016 [9] => 10/2016 [10] => 09/2016 [11] => 08/2016 [12] => 07/2016 )
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Array ( [0] => 07/2017 [1] => 06/2017 [2] => 05/2017 [3] => 04/2017 [4] => 03/2017 [5] => 02/2017 [6] => 01/2017 [7] => 12/2016 [8] => 11/2016 [9] => 10/2016 [10] => 09/2016 [11] => 08/2016 [12] => 07/2016 )

preferences:
192.35 ms | 402 KiB | 291 Q