Easy way to get day number of current quarter?

Question

PHP provides ways to get the number of the current day of the month (date(\'j\')) as well as the number of the current day of the year (date(\'z\')). Is there a way to get the n

Answer 1

We need to calculate the date of the first quarter first

$current_month = date('m');

// Get first month of quarter
$new_month = (3 * floor(($current_month - 1 ) / 3)) + 1;

// Add prefix zero if needed
$new_month = substr('0' . $new_month, -2);

$first_quarter_day_date = date('Y') . '-' . $new_month . '-01';

next we calculate the http://php.net/manual/en/datetime.diff.php

$datetime1 = new DateTime($first_quarter_day_date);
$datetime2 = new DateTime();

$interval = $datetime1->diff($datetime2);
echo $interval->format('%a days');