3v4l.org

run code in 300+ PHP versions simultaneously
<?php $yyyymmdd = date('Ymd', strtotime(time()-"6 months")); echo $yyyymmdd;
Output for 7.1.0 - 7.1.20, 7.2.6 - 7.2.8
Notice: A non well formed numeric value encountered in /in/C5qfE on line 3 19700101
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20
19700101
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5
1426900814

preferences:
175.03 ms | 402 KiB | 218 Q