Php Programming Code Examples

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Calculation of easterday and the holydays depended of easterday



Calculation of easterday and the holydays depended of easterday

<?php 
/* goldnum: The Golden Number */ 
/* epact: Paschal Full Moon */ 
function easterday ($year) { 
  $goldnum = (int) ($year%19) + 1; 
  $century = (int) $year/100 + 1; 
  $greg_corr = (int) (3*$century)/4 - 12; 
  $clav_corr = (int) ($century - 16 - ($century-18)/25)/3; 
  $extra = (int) (5*$year)/4 - $greg_corr - 10; 
  $epact = (int) (11*$goldnum + 20 + $clav_corr - $greg_corr)%30; 
  if ($epact <= 0 ) $epact = $epact + 30; 
  if (($epact == 24 || $epact == 25) && $goldnum > 11) $epact = $epact + 1; 
  $day = 44 - $epact; 
  if ($day < 21) $day = $day + 30; 
  $day = $day + 7 - (($extra+$day)%7); $month = 3; 
  if ($day > 31) { $month = 4; $day = $day - 31; } 
  return mktime(8,0,0,$month,$day,$year); 
} 

$seconds_pr_day = 86400; 
for ($i=1990; $i<=2010; $i++) { 
  $easter = easterday($i); 
  echo "Easterday: "; 
  echo date("Y-m-d", $easter); 
  echo " - Pentecost: "; 
  echo date("Y-m-d", $easter + (49*$seconds_pr_day)); 
  echo "\n"; 
} 
?>