problem while using datediff function

[bandy]

Hi,
I am using datediff() function to get difference between two dates.
my code looks like,

function dateDiff($dformat, $endDate, $beginDate)
	{
		 $date_parts1 = explode($dformat, $beginDate);
		 $date_parts2 = explode($dformat, $endDate);
		 $start_date  = gregoriantojd($date_parts1[1], $date_parts1[0], $date_parts1[2]);
		 $end_date    = gregoriantojd($date_parts2[1], $date_parts2[0], $date_parts2[2]);
		 
		 return $end_date - $start_date; 
    }

this gives error as "Warning: gregoriantojd() expects parameter 2 to be long"
but problem occurs for particular dates only not for all.
What should i do to overcome this. can you please give me helping hand.

Thank you in advance.

[zorgi]

What dates this problem occurs for?

[bandy]

Hi zorgi,
I got my solution, on datediff(). thank you for reply.