diff --git a/random.php b/random.php
index 3bcb1d4..1de83ce 100644
--- a/random.php
+++ b/random.php
@@ -16,6 +16,15 @@ function generateRandomString($length = 32) {
     return $randomString;
 }
 
+  function uuidv4()
+  {
+    $data = random_bytes(16);
+
+    $data[6] = chr(ord($data[6]) & 0x0f | 0x40); // set version to 0100
+    $data[8] = chr(ord($data[8]) & 0x3f | 0x80); // set bits 6-7 to 10
+
+    return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
+  }
 
 
  ?>