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function DateDiff( $part , $begin , $end ) { $diff = strtotime ( $end ) - strtotime ( $begin ); switch ( $part ) { case "y" : $retval = bcdiv ( $diff , (60 * 60 * 24 * 365)); break ; case "m" : $retval = bcdiv ( $diff , (60 * 60 * 24 * 30)); break ; case "w" : $retval = bcdiv ( $diff , (60 * 60 * 24 * 7)); break ; case "d" : $retval = bcdiv ( $diff , (60 * 60 * 24)); break ; case "h" : $retval = bcdiv ( $diff , (60 * 60)); break ; case "n" : $retval = bcdiv ( $diff , 60); break ; case "s" : $retval = $diff ; break ; } return $retval ; } function DateAdd( $part , $number , $date ) { $date_array = getdate ( strtotime ( $date )); $hor = $date_array [ "hours" ]; $min = $date_array [ "minutes" ]; $sec = $date_array [ "seconds" ]; $mon = $date_array [ "mon" ]; $day = $date_array [ "mday" ]; $yar = $date_array [ "year" ]; switch ( $part ) { case "y" : $yar += $number ; break ; case "q" : $mon += ( $number * 3); break ; case "m" : $mon += $number ; break ; case "w" : $day += ( $number * 7); break ; case "d" : $day += $number ; break ; case "h" : $hor += $number ; break ; case "n" : $min += $number ; break ; case "s" : $sec += $number ; break ; } return date ( "Y-m-d H:i:s" , mktime ( $hor , $min , $sec , $mon , $day , $yar )); } Function DateAdd( $part , $n , $date ) { switch ( $part ) { case "y" : $val = date ( "Y-m-d H:i:s" , strtotime ( $date . " +$n year" )); break ; case "m" : $val = date ( "Y-m-d H:i:s" , strtotime ( $date . " +$n month" )); break ; case "w" : $val = date ( "Y-m-d H:i:s" , strtotime ( $date . " +$n week" )); break ; case "d" : $val = date ( "Y-m-d H:i:s" , strtotime ( $date . " +$n day" )); break ; case "h" : $val = date ( "Y-m-d H:i:s" , strtotime ( $date . " +$n hour" )); break ; case "n" : $val = date ( "Y-m-d H:i:s" , strtotime ( $date . " +$n minute" )); break ; case "s" : $val = date ( "Y-m-d H:i:s" , strtotime ( $date . " +$n second" )); break ; } return $val ; } |