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

I've noticed that this thread went a bit beyond the question, and it's the first response to many google searches with "Quarter" & "PHP" in them.

If you're working with the ISO standards of organization, which you should if you're doing a business app, then

$curMonth = date("m", time());
$curQuarter = ceil($curMonth/3);

Is NOT correct, because the first day of a year in the ISO standards, can be 30, or 31 December.

Instead, you should use this :

  $current_yearly_cycle_year_number = 2019;
  $current_yearly_cycle_start->setISODate( $current_yearly_cycle_year_number, 1, 1 );
  $current_yearly_cycle_end->setISODate( $current_yearly_cycle_year_number, 53, 1 );

  if( $current_yearly_cycle_end->format("W") !== "53" )
    $current_yearly_cycle_end->setISODate( $current_yearly_cycle_year_number, 52, 1 );

  $week_number_start = intval( $current_yearly_cycle_start->format( "W" ) );
  $timestamp_start_quarter = ( $week_number_start === 1 ? 1 : intval( ceil( $current_yearly_cycle_start->format( "m" ) / 3 ) ) );

  var_dump( $timestamp_start_quarter );