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<?php $date = strtotime("2014-09-16"); $timestamp = strtotime('+15 weeks',$date); echo " Date=".date('Y-m-d', $timestamp); echo " Date=".date('Y-W - last digit is week in year', $timestamp);
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 - 5.6.38, 7.0.0 - 7.0.31, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Date=2014-12-30 Date=2014-01 - Tuesdayam0031 3000120031 0000 2Europe/AmsterdamEurope/Amsterdamk 0012 14Europe/AmsterdamamTue, 30 Dec 2014 00:00:00 +0100
Output for 7.3.32 - 7.3.33, 8.0.13
Date=2014-12-30 Date=2014-01 - Tuesdayam0031 3000120031 0000 2UTCUTCk 0012 14UTCamTue, 30 Dec 2014 00:00:00 +0000
Output for 4.4.1 - 4.4.9, 5.0.5
Date=2014-12-30 Date=2014-01 - Tuesdayam0031 3000120031 0000 2eek 0012 14eamTue, 30 Dec 2014 00:00:00 +0100
Output for 4.3.0 - 4.3.11, 4.4.0, 5.0.0 - 5.0.4
Date=2014-12-30 Date=2014-1 - Tuesdayam0031 3000120031 0000 2eek 0012 14eamTue, 30 Dec 2014 00:00:00 +0100

preferences:
263.37 ms | 402 KiB | 420 Q