3rd and 2nd day

01/part1.php

@@ -0,0 +1,17 @@
+<?php
+/**
+ *
+ */
+
+$increased = 0;
+$input = file('input', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
+$input = array_map('intval', $input);
+$previousReading = array_shift($input);
+
+foreach ($input as $line) {
+    if ($line > $previousReading) {
+        $increased++;
+    }
+    $previousReading = $line;
+}
+echo $increased; //1553