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<?php $now = new DateTime('now', new DateTimeZone('Asia/Tokyo')); $firstDay = new DateTime($now->format('Y-m-1'), new DateTimeZone('Asia/Tokyo')); var_dump($firstDay); var_dump($firstDay->format('w')); $lastDay = $firstDay->add(DateInterval::createFromDateString('1 Month - 1day')); var_dump($lastDay); var_dump($lastDay->format('w'));
Output for 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, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
object(DateTime)#2 (3) { ["date"]=> string(26) "2017-04-01 00:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(10) "Asia/Tokyo" } string(1) "6" object(DateTime)#2 (3) { ["date"]=> string(26) "2017-04-30 00:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(10) "Asia/Tokyo" } string(1) "0"
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 object(DateTime)#2 (3) { ["date"]=> string(26) "2017-04-01 00:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(10) "Asia/Tokyo" } string(1) "6" object(DateTime)#2 (3) { ["date"]=> string(26) "2017-04-30 00:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(10) "Asia/Tokyo" } string(1) "0"

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