Advent of Code 2015 - Day 2 Exercise 2

2-2.php

<?php
$totalRibbon = 0;
function howMuchRibbon($dimension) {
$dimensions = Array();
$dimensions = explode("x",$dimension);
$length = $dimensions[0];
$width = $dimensions[1];
$height = $dimensions[2];
$side1 = $length * $width;
$side2 = $width * $height;
$side3 = $length * $height;
$side1p = $length + $length + $width + $width;
$side2p = $height + $height + $width + $width;
$side3p = $length + $length + $height + $height;
$smallestPer = min($side1p,$side2p,$side3p);
$bowRibbon = $length * $width * $height;
$ribbonNeeded = $smallestPer + $bowRibbon;
return intval($ribbonNeeded);
}
$handle = @fopen("/home/arthur/adventcode/presents.txt", "r");
if ($handle) {
    while (($buffer = fgets($handle, 4096)) !== false) {
        $totalRibbon = $totalRibbon + howMuchRibbon($buffer);
    }
    if (!feof($handle)) {
        echo "Error: unexpected fgets() fail\n";
    }
    fclose($handle);
}
echo "Total Ribbon is " . $totalRibbon;