2024 day 3 part 1

Author: dannyvankooten

2024-php/03.php

@@ -0,0 +1,13 @@
+<?php
+
+$input = trim(file_get_contents('03.txt'));
+
+$matches = [];
+preg_match_all('/mul\((\d{1,3}),(\d{1,3})\)/', $input, $matches);
+
+$pt1 = 0;
+for ($i = 0; $i < count($matches[0]); $i++) {
+	$pt1 += $matches[1][$i] * $matches[2][$i];
+}
+
+echo "Part 1: " , $pt1, PHP_EOL;