Número de días entre dos fechas

[aurson]

Hola,

Quiero calcular el número de días que hay entre dos fechas posteriores a 12/12/1582 y que se reciben por URL, del tipo "loquesea.php?D1=1&M1=5&A1=2005&D2=10&M2=6&A2=2006".

Pero al ejecutar el código, como resultado me sale "0" y varios avisos del tipo "Notice: Undefined variable: year in loquesea.php on line 129"

¿Alguna idea de qué hago mal? GRACIAS por adelantado.


Este es el código en el que estoy trabajando:

Código:

<?
function wrongData($day1, $month1, $year1, $day2, $month2, $year2)
{
$wrong=false;
if ($year2<$year1) {
	$wrong=true;
} else {
	if ($year2=$year1 && $month2<$month1) {
	$wrong=true;
		} else {
			if ($year2=$year1 && $month2=$month1 && $day2<$day1) {
			   $wrong=true;
			}
	  }	
   return($wrong);  
   } 
} 

function isLeapYear()
{

if ($year%400 == 0) {
	$leap=true;
} else {
	if ($year%100 == 0) {
		$leap=false;
	} else {
		if ($year%4 == 0) {
			$leap=true;
		} else {
			$leap=false;
		}
	}
  }	
return($leap);	
}

function dayOfTheYear()
{
$dayscounter=$day;

	if ($month >11) { 
		$daysCounter = $daysCounter + 30; 
	}
	if ($month >10) { 
		$daysCounter = $daysCounter + 31;
	}
	if ($month >9) { 
		$daysCounter = $daysCounter + 30; 
	}
	if ($month >8) { 
		$daysCounter = $daysCounter + 31; 
	}
	if ($month >7) { 
		$daysCounter = $daysCounter + 31; 
	}
	if ($month >6) { 
		$daysCounter = $daysCounter + 30; 
	}
	if ($month >5) { 
		$daysCounter = $daysCounter + 31; 
	}
	if ($month >4) { 
		$daysCounter = $daysCounter + 30; 
	}
	if ($month >3) { 
		$daysCounter = $daysCounter + 31; 
	}
	if ($month >2) { 
		$daysCounter = $daysCounter + 28; 
	}
	if ($month >1) { 
		$daysCounter = $daysCounter + 31; 
	}
  
	if (isLeapYear($year) && $month > 2) { 
     $daysCounter = $daysCounter + 1;
	}
  return($daysCounter);

}

function daysYearsAfter1583()
{
$daysCounter=0;
$currentYear=1583;
 while ($currentYear<$year) {
	 $daysCounter=$daysCounter+365;
	 $leap=isLeapYear($currentYear);
	    if ($leap) {
			$daysCounter=$daysCounter+1;
		}
		$currentYear=$currentYear+1;
 }
return($daysCounter);
}

function daysAfter1583()
{
 return(daysYearsAfter1583($year) + dayOfTheYear($year,$month,$day));
}

 /****************** MAIN PROGRAM ********************/	
 
 
 $day1=$_GET["D1"];
 $month1=$_GET["M1"];
 $year1=$_GET["A1"];
 
 $day2=$_GET["D2"];
 $month2=$_GET["M2"];
 $year2=$_GET["A2"];
 
 

 if (wrongdata($day1, $month1, $year1, $day2, $month2, $year2)) {
	  print("E");
 } else {
	$counter1=daysAfter1583($year1, $month1, $day1);
	$counter2=daysAfter1583($year2, $month2, $day2);
	print($counter2-$counter1);
 }
 
$day=date("d");
$month=date("m");
$year=date("Y");


?>