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<?php $sarting = "2015-06-01 00:00:00"; $store_date = []; $date = new DateTime($sarting); for ($i = 0; $i < 20; $i++) { $date->modify('+3 months'); $store_date[] = $date->format('Y-m-d'); } print_r($store_date);
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0 - 8.5.1
Array ( [0] => 2015-09-01 [1] => 2015-12-01 [2] => 2016-03-01 [3] => 2016-06-01 [4] => 2016-09-01 [5] => 2016-12-01 [6] => 2017-03-01 [7] => 2017-06-01 [8] => 2017-09-01 [9] => 2017-12-01 [10] => 2018-03-01 [11] => 2018-06-01 [12] => 2018-09-01 [13] => 2018-12-01 [14] => 2019-03-01 [15] => 2019-06-01 [16] => 2019-09-01 [17] => 2019-12-01 [18] => 2020-03-01 [19] => 2020-06-01 )
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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