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run code in 150+ php & hhvm versions
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<?php $timeStamp = strtotime(time()); $ayer = time() - 1 * 24 * 60 * 60; $ayer = 1377921600; echo PHP_EOL; echo date(DATE_ATOM, $ayer); echo strtotime('2013-07-29 04:00:00 UTC');
Output for 5.1.3 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
2013-08-31T06:00:00+02:001375070400
Output for 5.1.2
2013-08-31T06:00:00+02001375070400
Output for 5.1.1
2013-08-31T06:00:00+0200
Output for 5.1.0
Notice: Use of undefined constant DATE_ATOM - assumed 'DATE_ATOM' in /in/Vki29 on line 7 SatAMCESTE_AMCEST+0200Aug
Output for 4.3.10 - 4.4.9, 5.0.2 - 5.0.5
Notice: Use of undefined constant DATE_ATOM - assumed 'DATE_ATOM' in /in/Vki29 on line 7 SatAMCESTE_AMCEST+0200Aug1375070400
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.1
Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/Vki29 on line 6 PHP_EOL Notice: Use of undefined constant DATE_ATOM - assumed 'DATE_ATOM' in /in/Vki29 on line 7 SatAMCESTE_AMCEST+0200Aug1375070400