PHP date formatting, date calculation, and obtaining the current week and month start and end dates

PHP date formatting, date calculation, and obtaining the current week and month start and end dates
PHP date formatting and date calculation, and when obtaining the previous week, month and end date

PHP date formatting sample code:

/*** Format time ** $ type: type * $ strDate: Time string to be processed ** year Y: four-digit year y: two-digit year * month m: double Digit month n: one digit month M: English month * Date d: double digit date j: one digit date D: English date * hour: H, minute: i. Seconds: s **/public function GetFormatDate ($ type = 1, $ strDate = '') {$ time = time (); if (isset ($ strDate) &&! Empty ($ strDate) {$ time = strtotime ($ strDate);} switch ($ type) {case 1: return date ("H: I", $ time ); case 2: return date ("m month d day H: I", $ time); case 3: return date ("m/d H: I", $ time ); case 4: return date ("Y, m, d, H: I", $ time); case 5: return date ("Y/m/d H: I ", $ time); case 6: return date ("Y, m, D, H: I: s", $ time); case 7: return date ("Y-m-d H: I: s", $ time); case 8: return date ("Y/m/d H: I: s ", $ time); default: return $ strDate ;}}

Date calculation sample code:

/*** Time addition/subtraction processing ** $ strDate: Time string to be processed * $ days: plus or minus days **/public function ChangeDate ($ strDate, $ days) {$ time = time (); if (isset ($ strDate )&&! Empty ($ strDate) {$ time = strtotime ($ strDate);} return date ('Y-m-d H: I: s ', strtotime ("$ days day", $ time ));}

Sample Code for obtaining the start and end dates of the current week and month:

/*** Get the start and end dates of the current week and month *** $ dateArr ['w7']: Monday * $ dateArr ['w7']: weekend * $ dateArr ['m1 ']: first month * $ dateArr ['m2']: end of month **/public function GetCurrentDateInfo () {$ dayTimes = 24*60*60; $ dateArr = []; $ temp = ''; $ weekIndex = (int) date ('W'); switch ($ weekIndex) {case 0: $ dateArr ['w1 '] = date ('Y-m-d 00:00:00', strtotime ('+ 1 Day ')); $ dateArr ['w7'] = date ('Y-m-d 23:59:59 ', strtotime (' + 7 Day'); break; case 1: $ dateArr ['w1 '] = date ('Y-m-d 00:00:00'); $ dateArr ['w7'] = date ('Y-m-d 23:59:59 ', strtotime ('+ 6 Day'); break; case 2: $ dateArr ['w1'] = date ('Y-m-d 00:00:00 ', strtotime ('-1 Day'); $ dateArr ['w7'] = date ('Y-m-d 23:59:59', strtotime ('+ 5 Day ')); break; case 3: $ dateArr ['w1'] = date ('Y-m-d 00:00:00 ', strtotime ('-2 Day ')); $ dateArr ['w7'] = date ('Y-m-d 23:59:59 ', strtotime (' + 4 Day'); break; case 4: $ dateArr ['w1 '] = date ('Y-m-d 00:00:00', strtotime ('-3 Day ')); $ dateArr ['w7'] = date ('Y-m-d 23:59:59 ', strtotime (' + 3 Day'); break; case 5: $ dateArr ['w1 '] = date ('Y-m-d 00:00:00', strtotime ('-4 Day ')); $ dateArr ['w7'] = date ('Y-m-d 23:59:59 ', strtotime (' + 2 Day'); break; case 6: $ dateArr ['w1 '] = date ('Y-m-d 00:00:00', strtotime ('-5 Day ')); $ dateArr ['w7'] = date ('Y-m-d 23:59:59 ', strtotime (' + 1 Day'); break;} // 1-12: january to December $ monthIndex = (int) date ('M'); switch ($ monthIndex) {case 1: $ temp = date ('Y-02-01 00:00:00 '); $ dateArr ['m1 '] = date ('Y-m-01 00:00:00'); $ dateArr ['m2 '] = date ('Y-m-d 23:59:59 ', strtotime ($ temp)-$ dayTimes); break; case 2: $ temp = date ('Y-03-01 00:00:00 '); $ dateArr ['m1 '] = date ('Y-m-01 00:00:00'); $ dateArr ['m2 '] = date ('Y-m-d 23:59:59 ', strtotime ($ temp)-$ dayTimes); break; case 3: $ temp = date ('Y-04-01 00:00:00 '); $ dateArr ['m1 '] = date ('Y-m-01 00:00:00'); $ dateArr ['m2 '] = date ('Y-m-d 23:59:59 ', strtotime ($ temp)-$ dayTimes); break; case 4: $ temp = date ('Y-05-01 00:00:00 '); $ dateArr ['m1 '] = date ('Y-m-01 00:00:00'); $ dateArr ['m2 '] = date ('Y-m-d 23:59:59 ', strtotime ($ temp)-$ dayTimes); break; case 5: $ temp = date ('Y-06-01 00:00:00 '); $ dateArr ['m1 '] = date ('Y-m-01 00:00:00'); $ dateArr ['m2 '] = date ('Y-m-d 23:59:59 ', strtotime ($ temp)-$ dayTimes); break; case 6: $ temp = date ('Y-07-01 00:00:00 '); $ dateArr ['m1 '] = date ('Y-m-01 00:00:00'); $ dateArr ['m2 '] = date ('Y-m-d 23:59:59 ', strtotime ($ temp)-$ dayTimes); break; case 7: $ temp = date ('Y-08-01 00:00:00 '); $ dateArr ['m1 '] = date ('Y-m-01 00:00:00'); $ dateArr ['m2 '] = date ('Y-m-d 23:59:59 ', strtotime ($ temp)-$ dayTimes); break; case 8: $ temp = date ('Y-09-01 00:00:00 '); $ dateArr ['m1 '] = date ('Y-m-01 00:00:00'); $ dateArr ['m2 '] = date ('Y-m-d 23:59:59 ', strtotime ($ temp)-$ dayTimes); break; case 9: $ temp = date ('Y-10-01 00:00:00 '); $ dateArr ['m1 '] = date ('Y-m-01 00:00:00'); $ dateArr ['m2 '] = date ('Y-m-d 23:59:59 ', strtotime ($ temp)-$ dayTimes); break; case 10: $ temp = date ('Y-11-01 00:00:00 '); $ dateArr ['m1 '] = date ('Y-m-01 00:00:00'); $ dateArr ['m2 '] = date ('Y-m-d 23:59:59 ', strtotime ($ temp)-$ dayTimes); break; case 11: $ temp = date ('Y-12-01 00:00:00 '); $ dateArr ['m1 '] = date ('Y-m-01 00:00:00'); $ dateArr ['m2 '] = date ('Y-m-d 23:59:59 ', strtotime ($ temp)-$ dayTimes); break; case 12: $ temp = date ('y') + 1 ). "-01-01 00:00:00"); $ dateArr ['m1 '] = date ('Y-m-01 00:00:00 '); $ dateArr ['m2'] = date ('Y-m-d 23:59:59 ', strtotime ($ temp)-$ dayTimes); break;} return $ dateArr ;}

The above code is for reference only. Please point out the omissions for improvement!