eventespresso / event-espresso-core

		$xmax = 0;

		$ymax = 0;

		$results = (array) $results;

		foreach ( $results as $result ) {

			$regs[] = array( $result->regDate, (int)$result->total );

			$xmin = strtotime( $result->regDate ) < strtotime( $xmin ) ? $result->regDate : $xmin;

			$xmax = strtotime( $result->regDate ) > strtotime( $xmax ) ? $result->regDate : $xmax;

			$ymax = $result->total > $ymax ? $result->total : $ymax;

		}

		$xmin = date( 'Y-m-d', strtotime( date( 'Y-m-d', strtotime($xmin)) . ' -1 day' ));

		$xmax = date( 'Y-m-d', strtotime( date( 'Y-m-d', strtotime($xmax)) . ' +1 day' ));

		$results = (array) $results;

		foreach ( $results as $result ) {

			$revenue[] = array( $result->txnDate, (float)$result->revenue );

			$xmin = strtotime( $result->txnDate ) < strtotime( $xmin ) ? $result->txnDate : $xmin;

			$xmax = strtotime( $result->txnDate ) > strtotime( $xmax ) ? $result->txnDate : $xmax;

			$ymax = $result->revenue > $ymax ? $result->revenue : $ymax;

		}

		$xmin = date( 'Y-m-d', strtotime( date( 'Y-m-d', strtotime($xmin)) . ' -1 day' ));

		$xmax = date( 'Y-m-d', strtotime( date( 'Y-m-d', strtotime($xmax)) . ' +1 day' ));