pick_smaller_box.php

<?php
					// go through possible packages
					foreach ( $possible_packages as $package ) {

						// add the best to a new array
						if ( $package->percent == $best_percent ) {
							$best_packages[] = $package;
						}
					}

					// if there's only one, that's our package
					if ( 1 == count( $best_packages ) ) {
						$best_package = $best_packages[0];
					} else {

						// if more, go through each
						foreach ( $best_packages as $package ) {

							// get the lowest volume (smallest box)
							$lowest_volume = ( isset( $lowest_volume ) ) ? $lowest_volume : $package->box_vol;

							// and set the smallest box as the best package
							if ( $lowest_volume >= $package->box_vol ) {
								$best_package = $package;
							}
						}
					}