✨ Finit le jour 6

day_6/part_1.php

@@ -0,0 +1,12 @@
+<?php
+
+$groups = explode("\n\n", file_get_contents('input.txt'));
+
+$yesses = 0;
+
+foreach ($groups as $group) {
+    $group_yes = implode('', explode("\n", $group));
+    $yesses += count(array_unique(str_split($group_yes)));
+}
+
+echo $yesses;