<font size=5 color=#0316BB face=Dolphin>Berechnen Sie hier das Osterdatum eines beliebigen Jahres!</font>
<form action='404.php' method='post'>
<table border='0' cellpadding='0' cellspacing='4'>
<tr>
 <td align='right'>Jahr:</td>
 <td><input name='year' type='$zahl' size='4' maxlength='4'></td>
 </tr><tr>
 <td align='right'><input type='submit' value='Berechnen!'></td>  
 </tr>
</table> 
</form>

<?php
 {  
      $a=$year/19;
      $b=$year/4;
      $c=$year/7;
      $d=$h/30;
      $e=$g/7;
      
      $f=19*$a;
      $g=$i+$j+$k+$N;
      
      $h=$f+$M;
      
      $i=2*$b;
      $j=4*$c;
      $k=6*$d;
      
      
	   if ($year > 1700 and $year < 1799)
	  {
	    $M=23 and $N=3;
	  }
     if ($year > 1800 and $year < 1899)
     {
	   $M=23 and $N=4;
	}
	if ($year > 1900 and $year < 2099)
	{
	  $M=24 and $N=5;
	}
	if ($year > 2100 and $year < 2199)
	{
	  $M=24 and $N=6;
	}
	     
	
	if (22+$d+$e > 31)
	{
	  $easter2="0";
	} 
	else
	{
	  $easter2=22+$d+$e;
	}
	
	if ($d+$e-9==26)
	{
	  $easter1=19;
	}
	if ($d+$e-9==25 and $d==28 and $a > 10)
	{
	  $easter1=18;
	}
	else
	{
	  $easter1=$d+$e-9;
	}
	if ($d+$e-9!==26 and $d+$e-9!==25)
	{
	  $easter1=$d+$e-9;
	}	
}
if (!isset($year) or $year=="")
{
  echo "";
}
else
{
  if ($easter2=="0")
  {
    echo "Der Ostersonntag fällt im Jahr $year auf den $easter1 April.";
}
else
{
  echo "Der Ostersonntag fällt im Jahr $year auf den $easter2 März";
}
}
?>