Today, I have a question regarding PHP date manipulation.
Code
$calcdateloops = date("Y-m-01", strtotime(date('Y-m-d')." -1 year -6 Month")); //2015-01-01
$enddate = date('Y-m-d');
Now, my goal is to divide the dates into quarters, meaning every 3 months.
Expected Result
1) 2015-01-01 - 2015-03-30 // first loop
2) 2015-04-01 - 2015-06-30
3) 2015-07-01 - 2015-09-30
.... and so on until the end date
Does anyone know of a simple way to achieve this result?
Utilizing the powerful DateTime and DateInterval classes can simplify solving complex date-related questions without having to worry about the varying days in each month.
// Constructing DateTime object with various formats supported by strtotime
$startdate = new DateTime('first day of this month - 18 months');
// Omitting value defaults to current date
$enddate = new DateTime();
// Refer to the manual for all possible DateInterval formats
// Typically, intervals start with P (period) followed by number of days, months, seconds, etc.
$interval = new DateInterval('P3M');
do {
// Using clone prevents referencing the same object when manipulating variables
$periodstart = clone $startdate;
$startdate->add($interval);
$periodend = clone $startdate;
// Subtracting one day ensures distinct start and end dates for each period
$periodend->sub(new DateInterval('P1D'));
echo 'start: ', $periodstart->format('Y-m-d'), ', ', 'end: ', $periodend->format('Y-m-d'), '<br>';
} while ($startdate < $enddate);
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