3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(strtotime(null)); var_dump(date("Y-m-d H:i:s", strtotime("monday this week", strtotime("2013-10-18"))));
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated in /in/c0Ov1 on line 2 bool(false) string(19) "2013-10-14 00:00:00"
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.30, 7.0.0 - 7.0.20, 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
bool(false) string(19) "2013-10-14 00:00:00"
Output for 5.1.2 - 5.1.6, 5.2.0 - 5.2.17
bool(false) string(19) "2013-10-21 00:00:00"
Output for 5.1.0 - 5.1.1
int(1382341718) string(19) "2013-10-21 00:00:00"
Output for 5.0.1 - 5.0.5
Warning: strtotime(): Called with an empty time parameter. in /in/c0Ov1 on line 2 int(-1) string(19) "2013-10-21 00:00:00"
Output for 4.3.5 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0
Notice: strtotime(): Called with empty time parameter in /in/c0Ov1 on line 2 int(1382306400) string(19) "2013-10-21 00:00:00"
Output for 4.3.2 - 4.3.4
Notice: strtotime(): Called with empty time parameter in /in/c0Ov1 on line 2 int(1382306400) string(19) "2013-10-27 23:00:00"
Output for 4.3.0 - 4.3.1
Notice: strtotime() [http://www.php.net/function.strtotime]: Called with empty time parameter in /in/c0Ov1 on line 2 int(1382306400) string(19) "2013-10-27 23:00:00"

preferences:
292.08 ms | 402 KiB | 416 Q