Day of week: Difference between revisions
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| | | PHP: {{kbd | key=<nowiki>echo date('Y-m-d', strtotime('Friday -7 day')) . PHP_EOL;</nowiki>}} | ||
| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">-2</span> - WEEKDAY(CURDATE()) DAY;}} <br /> PHP<ref>[https://stackoverflow.com/questions/3742820/php-how-to-get-previous-sunday-of-a-specific-date-in-the-past PHP: How to get previous Sunday of a specific date in the past..? - Stack Overflow]</ref>: (1) {{kbd | key=<nowiki>echo date('Y-m-d', strtotime("last Saturday")) . PHP_EOL;</nowiki>}} (2) {{kbd | key=<nowiki>echo date('Y-m-d', strtotime('last Saturday', strtotime("2018-03-04 00:01:00"))) . PHP_EOL;</nowiki>}} | | MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">-2</span> - WEEKDAY(CURDATE()) DAY;}} <br /> PHP<ref>[https://stackoverflow.com/questions/3742820/php-how-to-get-previous-sunday-of-a-specific-date-in-the-past PHP: How to get previous Sunday of a specific date in the past..? - Stack Overflow]</ref>: (1) {{kbd | key=<nowiki>echo date('Y-m-d', strtotime("last Saturday")) . PHP_EOL;</nowiki>}} (2) {{kbd | key=<nowiki>echo date('Y-m-d', strtotime('last Saturday', strtotime("2018-03-04 00:01:00"))) . PHP_EOL;</nowiki>}} | ||
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| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">2</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+4</nowiki>}} | | MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">2</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+4</nowiki>}} | ||
| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">3</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+5</nowiki>}} | | MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">3</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+5</nowiki>}} | ||
| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">4</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+6</nowiki>}} | | MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">4</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+6</nowiki>}}<br />PHP: {{kbd | key=<nowiki>echo date('Y-m-d', strtotime('Friday')) . PHP_EOL;</nowiki>}} | ||
| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">5</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+7</nowiki>}} <br />PHP: {{kbd | key=<nowiki>echo date('Y-m-d', strtotime("Saturday")) . PHP_EOL;</nowiki>}} | | MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">5</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+7</nowiki>}} <br />PHP: {{kbd | key=<nowiki>echo date('Y-m-d', strtotime("Saturday")) . PHP_EOL;</nowiki>}} | ||
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| | | PHP: {{kbd | key=<nowiki>echo date('Y-m-d', strtotime('Friday +7 day')) . PHP_EOL;</nowiki>}} | ||
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Revision as of 18:42, 13 May 2019
Numeric representation of the day of the week. MySQL, Excel or PHP approaches to specify these date time.
Weekday
The value of weekday obtained from different approaches.
| Weekday values from different approaches | Sunday | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday |
|---|---|---|---|---|---|---|---|
| PHP date with N format character: Weekday (ISO-8601) | 7 | 1 | 2 | 3 | 4 | 5 | 6 |
| MySQL WEEKDAY() function | 6 | 0 | 1 | 2 | 3 | 4 | 5 |
| MySQL DAYOFWEEK() Function | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Excel WEEKDAY() function | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| PHP date with w format character | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
Get the date
Get the date of weekday from another known date (today or another specific day)
| Day | Sunday | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday |
|---|---|---|---|---|---|---|---|
| Last week | MySQL: SELECT CURDATE() + INTERVAL -8 - WEEKDAY(CURDATE()) DAY; Excel: =TODAY()-WEEKDAY(NOW())-6 PHP: echo date('Y-m-d', strtotime("Sunday -14 day")) . PHP_EOL; |
MySQL: SELECT CURDATE() + INTERVAL -7 - WEEKDAY(CURDATE()) DAY; Excel: =TODAY()-WEEKDAY(NOW())-5 PHP: echo date('Y-m-d', strtotime("monday this week -7 day")) . PHP_EOL; |
PHP: echo date('Y-m-d', strtotime('Friday -7 day')) . PHP_EOL; | MySQL: SELECT CURDATE() + INTERVAL -2 - WEEKDAY(CURDATE()) DAY; PHP[1]: (1) echo date('Y-m-d', strtotime("last Saturday")) . PHP_EOL; (2) echo date('Y-m-d', strtotime('last Saturday', strtotime("2018-03-04 00:01:00"))) . PHP_EOL; | |||
| This week | MySQL: SELECT CURDATE() + INTERVAL -1 - WEEKDAY(CURDATE()) DAY; Excel: =TODAY()-WEEKDAY(NOW())+1 PHP: echo date('Y-m-d', strtotime("Sunday -7 day")) . PHP_EOL; |
MySQL: SELECT CURDATE() + INTERVAL 0 - WEEKDAY(CURDATE()) DAY; Excel: =TODAY()-WEEKDAY(NOW())+2 PHP: echo date('Y-m-d', strtotime("monday this week")) . PHP_EOL; |
MySQL: SELECT CURDATE() + INTERVAL 1 - WEEKDAY(CURDATE()) DAY; Excel: =TODAY()-WEEKDAY(NOW())+3 |
MySQL: SELECT CURDATE() + INTERVAL 2 - WEEKDAY(CURDATE()) DAY; Excel: =TODAY()-WEEKDAY(NOW())+4 |
MySQL: SELECT CURDATE() + INTERVAL 3 - WEEKDAY(CURDATE()) DAY; Excel: =TODAY()-WEEKDAY(NOW())+5 |
MySQL: SELECT CURDATE() + INTERVAL 4 - WEEKDAY(CURDATE()) DAY; Excel: =TODAY()-WEEKDAY(NOW())+6 PHP: echo date('Y-m-d', strtotime('Friday')) . PHP_EOL; |
MySQL: SELECT CURDATE() + INTERVAL 5 - WEEKDAY(CURDATE()) DAY; Excel: =TODAY()-WEEKDAY(NOW())+7 PHP: echo date('Y-m-d', strtotime("Saturday")) . PHP_EOL; |
| Next week | MySQL: SELECT CURDATE() + INTERVAL 6 - WEEKDAY(CURDATE()) DAY; Excel: =TODAY()-WEEKDAY(NOW())+8 PHP: echo date('Y-m-d', strtotime("Sunday")) . PHP_EOL; |
MySQL: SELECT CURDATE() + INTERVAL 7 - WEEKDAY(CURDATE()) DAY; Excel: =TODAY()-WEEKDAY(NOW())+9 PHP: (1) echo date('Y-m-d', strtotime("next monday")) . PHP_EOL; (2) echo date('Y-m-d', strtotime("monday this week +7 day")) . PHP_EOL; |
PHP: echo date('Y-m-d', strtotime('Friday +7 day')) . PHP_EOL; |
References
Further reading
- PHP date function: w character (0 for Sunday through 6 for Saturday) or N character (1 for Monday through 7 for Sunday)
- WEEKDAY 函數 - Office 支援
- ISO 8601 - Wikipedia
- mysql - How to get this coming Sunday's date? - Stack Overflow
- 如何在 Excel 中傳回的日期星期幾
- TODAY 函數 - Office 支援