php check weekday of date
$dayofweek = date('w', strtotime($date)); $result = date('Y-m-d', strtotime(($day - $dayofweek).' day', strtotime($date)));
php check weekday of date
$dayofweek = date('w', strtotime($date)); $result = date('Y-m-d', strtotime(($day - $dayofweek).' day', strtotime($date)));
php week of a date
Things to be aware of when using week numbers with years. <?php echo date("YW", strtotime("2011-01-07")); // gives 201101 echo date("YW", strtotime("2011-12-31")); // gives 201152 echo date("YW", strtotime("2011-01-01")); // gives 201152 too ?> BUT <?php echo date("oW", strtotime("2011-01-07")); // gives 201101 echo date("oW", strtotime("2011-12-31")); // gives 201152 echo date("oW", strtotime("2011-01-01")); // gives 201052 (Year is different than previous example) ?> Reason: Y is year from the date o is ISO-8601 year number W is ISO-8601 week number of year Conclusion: if using 'W' for the week number use 'o' for the year.
get day of month php
// get day of month php // Method 1; some server not work, I had check php 7.3.24 not worked, php 7.3.8 worked cal_days_in_month(CAL_GREGORIAN, $month, $year) echo (cal_days_in_month(CAL_GREGORIAN, 2, 2020)); // => 29 // Method 2; function days_in_month($month, $year) { // calculate number of days in a month return $month == 2 ? ($year % 4 ? 28 : ($year % 100 ? 29 : ($year % 400 ? 28 : 29))) : (($month - 1) % 7 % 2 ? 30 : 31); } // Method 3; echo (date('t', strtotime('2020-02-1'))); // 29
php date
<?php // set the default timezone to use. Available since PHP 5.1 date_default_timezone_set('UTC'); // Prints something like: Monday echo date("l"); // Prints something like: Monday 8th of August 2005 03:12:46 PM echo date('l jS \of F Y h:i:s A'); // Prints: July 1, 2000 is on a Saturday echo "July 1, 2000 is on a " . date("l", mktime(0, 0, 0, 7, 1, 2000)); /* use the constants in the format parameter */ // prints something like: Wed, 25 Sep 2013 15:28:57 -0700 echo date(DATE_RFC2822); // prints something like: 2000-07-01T00:00:00+00:00 echo date(DATE_ATOM, mktime(0, 0, 0, 7, 1, 2000)); ?>
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