10th day both parts

10/part2.php

@@ -0,0 +1,40 @@
+<?php
+$input = file('input', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
+$input = array_map('str_split', $input);
+
+$chunkPairs = [
+    ')' => '(',
+    ']' => '[',
+    '>' => '<',
+    '}' => '{',
+];
+$values = [
+    '(' => 1,
+    '[' => 2,
+    '{' => 3,
+    '<' => 4,
+];
+$scores = [];
+foreach ($input as $line) {
+    $tmpBuffer = [];
+    foreach ($line as $charPos => $char) {
+        if (in_array($char, array_values($chunkPairs))) {
+            $tmpBuffer[] = $char;
+        }
+        if (in_array($char, array_keys($chunkPairs))) {
+            $lastBufferItem = array_pop($tmpBuffer);
+            if ($chunkPairs[$char] !== $lastBufferItem) {
+                continue 2;
+            }
+        }
+    }
+    $score = 0;
+    foreach (array_reverse($tmpBuffer) as $bufferChar) {
+        $score *= 5;
+        $score += $values[$bufferChar];
+    }
+    $scores[] = $score;
+}
+sort($scores);
+print_r($scores);
+print_r($scores[floor(count($scores) / 2)]); //1118645287