Day 2 finished

2023/d2/d2.php

@@ -0,0 +1,35 @@
+<?php
+
+// Over-complicated because I thought they wouldn't put the cube back in the bag at first.
+
+$FILE_NAME = "input.txt";
+$sum = 0;
+
+$fd = fopen($FILE_NAME, "r");
+while($line = fgets($fd)){
+	$data = array();
+	preg_match("/Game (\d+): (.*)/", $line, $data);
+
+	$game_id = $data[1];
+	$hand = explode(";", $data[2]);
+
+	$valid = true;
+	foreach ($hand as $h) {
+		$bag = array(
+			"red" => 12,
+			"green" => 13,
+			"blue" => 14,
+		);
+		$colors = array();
+		preg_match_all("/(\d+) (red|green|blue)/", $h, $colors);
+		foreach (array_combine($colors[2], $colors[1]) as $key => $value) {
+			$bag[$key] = $bag[$key] - $value;
+			if($bag[$key] < 0){$valid = false;}
+		}
+	}
+	if($valid){$sum = $sum + $game_id; echo $game_id . "\n";}
+
+}
+fclose($fd);
+
+echo $sum;