✨ Finit le 2eme jour

day_2/part_1.php

@@ -0,0 +1,21 @@
+<?php
+
+$passwords = explode("\n", file_get_contents('input.txt'));
+
+$number_of_good_passwords = 0;
+
+foreach ($passwords as $password) {
+    $parts = explode(' ', $password);
+    if (count($parts) === 3) {
+        [$min, $max] = explode('-', $parts[0]);
+        $letter = $parts[1][0];
+        $word = $parts[2];
+        $chars = count_chars($word, 1);
+        if ($min <= $chars[ord($letter)] && $max >= $chars[ord($letter)]) {
+            $number_of_good_passwords++;
+        }
+    }
+}
+
+echo $number_of_good_passwords;
+exit(0);

day_2/part_2.php

@@ -0,0 +1,20 @@
+<?php
+
+$passwords = explode("\n", file_get_contents('input.txt'));
+
+$number_of_good_passwords = 0;
+
+foreach ($passwords as $password) {
+    $parts = explode(' ', $password);
+    if (count($parts) === 3) {
+        [$min, $max] = explode('-', $parts[0]);
+        $letter = $parts[1][0];
+        $word = $parts[2];
+        if ($word[$min-1] === $letter xor $word[$max-1] === $letter) {
+            $number_of_good_passwords++;
+        }
+    }
+}
+
+echo $number_of_good_passwords;
+exit(0);