<?php // Function Used to Validate a Date in the form of MM DD YYYY

function Valid_Date_MM_DD_YYYY ($mm, $dd, $yyyy)

{

$validday = 0;
$validmonth = ($mm >= 1) && ($mm <=12) && (is_numeric($mm));
$validyear = ($yyyy >= 1900) && ($yyyy <=3000) && (is_numeric($mm));

If (is_numeric($dd)&& $validmonth && $validyear)
{
		
	if (($mm == 1) || ($mm == 3) || ($mm == 5)|| ($mm == 7) || ($mm == 8) || ($mm == 10) || ($mm == 12))
	{
		$validday = ($dd >= 1) && ($dd<=31);
	} 
	
	elseif ($mm != 2)
	{
		if (($mm == 4) || ($mm == 6) || ($mm == 9)|| ($mm == 11))
		{
			$validday = ($dd >= 1) && ($dd<=30);
		} 
	}
	else 
	
	{	if (($yyyy % 4)== 0 )
		{
			$validday = ($dd >=1) && ($dd <=29);
		}
	
		
		else
		{
			$validday = ($dd >=1) && ($dd <=28);
		}
	}
	}
	
$validated = $validday && $validmonth && $validyear;	
return ($validated);
}	
?>