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run code in 150+ php & hhvm versions
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<?php $lundi = strtotime('next monday'); $numWeekM6 = strftime('%U', strtotime('+3 week', $lundi)) + 1; echo $lundi; echo '<br />'; echo $numWeekM6;
Output for 4.4.0 - 4.4.9, 5.0.5 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
1386543600<br />53
Output for 4.3.0 - 4.3.11, 5.0.0 - 5.0.4
1387148400<br />2