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The following function compares two dates in the dd/mm/yyyy format.
It uses the PHP function gregoriantojd() as mktime() is unreliable for
dates < 1970. The mcal_date_compare also relies on the mcal libraries being installed.
One improvement could be a third parameter passed in with the actual date format to be used.
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<?php
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// returns <0, 0, >0 if date a< date b,date a== date b,date a > date b respectively.
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function compareDate ($i_sFirstDate, $i_sSecondDate)
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{
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//Break the Date strings into seperate components
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$arrFirstDate = explode ("/", $i_sFirstDate);
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$arrSecondDate = explode ("/", $i_sSecondDate);
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$intFirstDay = $arrFirstDate[0];
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$intFirstMonth = $arrFirstDate[1];
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$intFirstYear = $arrFirstDate[2];
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$intSecondDay = $arrSecondDate[0];
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$intSecondMonth = $arrSecondDate[1];
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$intSecondYear = $arrSecondDate[2];
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// Calculate the diference of the two dates and return the number of days.
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$intDate1Jul = gregoriantojd($intFirstMonth, $intFirstDay, $intFirstYear);
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$intDate2Jul = gregoriantojd($intSecondMonth, $intSecondDay, $intSecondYear);
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return $intDate1Jul - $intDate2Jul;
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}//end Compare Date
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?>
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