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<?php function countDaysByName($dayName, \DateTime $start, \DateTime $end) { $count = 0; $interval = new \DateInterval('P1D'); $period = new \DatePeriod($start, $interval, $end); foreach($period as $day){ if($day->format('D') === ucfirst(substr($dayName, 0, 3))){ $count ++; } } return $count; } echo countDaysByName('wednesday', new \DateTime(2016-01-18), new \DateTime(2016-01-23)); echo var_dump(new \DateTime(2016-01-18));
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.15, 7.1.17 - 7.1.33, 7.2.0 - 7.2.2, 7.2.4 - 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 - 8.3.4, 8.3.6
0object(DateTime)#4 (3) { ["date"]=> string(26) "1997-01-16 13:28:21.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" }
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 0object(DateTime)#4 (3) { ["date"]=> string(26) "1997-01-16 13:28:21.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" }
Output for 7.3.32 - 7.3.33, 8.0.13
0object(DateTime)#4 (3) { ["date"]=> string(26) "1997-01-16 12:28:21.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" }
Output for 7.1.16, 7.2.3
0object(DateTime)#4 (3) { ["date"]=> string(26) "1997-01-16 13:28:22.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" }
Output for 5.5.14 - 5.5.38, 5.6.0 - 5.6.34, 5.6.36 - 5.6.40
0object(DateTime)#1 (3) { ["date"]=> string(26) "1997-01-16 13:28:21.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" }
Output for 5.6.35
0object(DateTime)#1 (3) { ["date"]=> string(26) "1997-01-16 13:28:22.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" }
Output for 5.5.0 - 5.5.13
0object(DateTime)#1 (3) { ["date"]=> string(19) "1997-01-16 13:28:21" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" }

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