Day 4

Author: Ngoc Pham

d04.php

@@ -0,0 +1,21 @@
+<?php
+
+function find(string $input, int $leading_zeros_count, int $start = 1)
+{
+    while (1) {
+        $hash = md5("{$input}{$start}");
+
+        if (substr($hash, 0, $leading_zeros_count) === str_pad('', $leading_zeros_count, '0')) {
+            return $start;
+        }
+
+        $start++;
+    }
+}
+
+$input = 'bgvyzdsv';
+
+$num = find($input, 5);
+var_dump($num);
+
+var_dump(find($input, 6, $num));