7th day both parts

07/part2.php

@@ -0,0 +1,13 @@
+<?php
+$input = file('input', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
+$input = explode(',', $input[0]);
+
+$minFuelCost = INF;
+foreach (range(min($input), max($input)) as $newPosition) {
+    $fuelCost = array_sum(array_map(fn($currentPosition) => (abs($currentPosition - $newPosition) * (abs($currentPosition - $newPosition) + 1)) / 2, $input));
+
+    if ($fuelCost < $minFuelCost) {
+        $minFuelCost = $fuelCost;
+    }
+}
+echo $minFuelCost; //91257582