3v4l.org

run code in 300+ PHP versions simultaneously
<?php for($i = 1; $i < 10; $i++) { echo date('c',strtotime("+$i days")) . " - " . date('c',strtotime('+1 Weekday',strtotime("+$i days"))) . "<br/>\n"; }
Output for 8.0.10 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
2013-01-29T22:21:05+01:00 - 2013-01-30T22:21:05+01:00<br/> 2013-01-30T22:21:05+01:00 - 2013-01-31T22:21:05+01:00<br/> 2013-01-31T22:21:05+01:00 - 2013-02-01T22:21:05+01:00<br/> 2013-02-01T22:21:05+01:00 - 2013-02-04T22:21:05+01:00<br/> 2013-02-02T22:21:05+01:00 - 2013-02-04T22:21:05+01:00<br/> 2013-02-03T22:21:05+01:00 - 2013-02-04T22:21:05+01:00<br/> 2013-02-04T22:21:05+01:00 - 2013-02-05T22:21:05+01:00<br/> 2013-02-05T22:21:05+01:00 - 2013-02-06T22:21:05+01:00<br/> 2013-02-06T22:21:05+01:00 - 2013-02-07T22:21:05+01:00<br/>
Output for 8.0.13
2013-01-29T21:21:05+00:00 - 2013-01-30T21:21:05+00:00<br/> 2013-01-30T21:21:05+00:00 - 2013-01-31T21:21:05+00:00<br/> 2013-01-31T21:21:05+00:00 - 2013-02-01T21:21:05+00:00<br/> 2013-02-01T21:21:05+00:00 - 2013-02-04T21:21:05+00:00<br/> 2013-02-02T21:21:05+00:00 - 2013-02-04T21:21:05+00:00<br/> 2013-02-03T21:21:05+00:00 - 2013-02-04T21:21:05+00:00<br/> 2013-02-04T21:21:05+00:00 - 2013-02-05T21:21:05+00:00<br/> 2013-02-05T21:21:05+00:00 - 2013-02-06T21:21:05+00:00<br/> 2013-02-06T21:21:05+00:00 - 2013-02-07T21:21:05+00:00<br/>
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.9
2013-01-29T22:21:05+01:00 - 2013-01-30T00:00:00+01:00<br/> 2013-01-30T22:21:05+01:00 - 2013-01-31T00:00:00+01:00<br/> 2013-01-31T22:21:05+01:00 - 2013-02-01T00:00:00+01:00<br/> 2013-02-01T22:21:05+01:00 - 2013-02-04T00:00:00+01:00<br/> 2013-02-02T22:21:05+01:00 - 2013-02-04T00:00:00+01:00<br/> 2013-02-03T22:21:05+01:00 - 2013-02-04T00:00:00+01:00<br/> 2013-02-04T22:21:05+01:00 - 2013-02-05T00:00:00+01:00<br/> 2013-02-05T22:21:05+01:00 - 2013-02-06T00:00:00+01:00<br/> 2013-02-06T22:21:05+01:00 - 2013-02-07T00:00:00+01:00<br/>
Output for 7.3.32 - 7.3.33
2013-01-29T21:21:05+00:00 - 2013-01-30T00:00:00+00:00<br/> 2013-01-30T21:21:05+00:00 - 2013-01-31T00:00:00+00:00<br/> 2013-01-31T21:21:05+00:00 - 2013-02-01T00:00:00+00:00<br/> 2013-02-01T21:21:05+00:00 - 2013-02-04T00:00:00+00:00<br/> 2013-02-02T21:21:05+00:00 - 2013-02-04T00:00:00+00:00<br/> 2013-02-03T21:21:05+00:00 - 2013-02-04T00:00:00+00:00<br/> 2013-02-04T21:21:05+00:00 - 2013-02-05T00:00:00+00:00<br/> 2013-02-05T21:21:05+00:00 - 2013-02-06T00:00:00+00:00<br/> 2013-02-06T21:21:05+00:00 - 2013-02-07T00:00:00+00:00<br/>
Output for 5.1.0 - 5.1.6
2013-01-29T22:21:05+01:00 - 1970-01-01T01:00:00+01:00<br/> 2013-01-30T22:21:05+01:00 - 1970-01-01T01:00:00+01:00<br/> 2013-01-31T22:21:05+01:00 - 1970-01-01T01:00:00+01:00<br/> 2013-02-01T22:21:05+01:00 - 1970-01-01T01:00:00+01:00<br/> 2013-02-02T22:21:05+01:00 - 1970-01-01T01:00:00+01:00<br/> 2013-02-03T22:21:05+01:00 - 1970-01-01T01:00:00+01:00<br/> 2013-02-04T22:21:05+01:00 - 1970-01-01T01:00:00+01:00<br/> 2013-02-05T22:21:05+01:00 - 1970-01-01T01:00:00+01:00<br/> 2013-02-06T22:21:05+01:00 - 1970-01-01T01:00:00+01:00<br/>
Output for 5.0.3 - 5.0.5
2013-01-29T22:21:05+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-01-30T22:21:05+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-01-31T22:21:05+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-02-01T22:21:05+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-02-02T22:21:05+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-02-03T22:21:05+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-02-04T22:21:05+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-02-05T22:21:05+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-02-06T22:21:05+01:00 - 1970-01-01T00:59:59+01:00<br/>
Output for 5.0.0 - 5.0.2
2013-01-29T00:00:00+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-01-30T00:00:00+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-01-31T00:00:00+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-02-01T00:00:00+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-02-02T00:00:00+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-02-03T00:00:00+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-02-04T00:00:00+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-02-05T00:00:00+01:00 - 1970-01-01T00:59:59+01:00<br/> 2013-02-06T00:00:00+01:00 - 1970-01-01T00:59:59+01:00<br/>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
c - c<br/> c - c<br/> c - c<br/> c - c<br/> c - c<br/> c - c<br/> c - c<br/> c - c<br/> c - c<br/>
preferences:
195.9 ms | 402 KiB | 351 Q