diff --git a/src/Check.php b/src/Check.php
index cc7ae27..113a6e8 100644
--- a/src/Check.php
+++ b/src/Check.php
@@ -120,6 +120,20 @@ class Check {
     }
   }
 
+  /**
+   * check if an uuid is correct
+   *
+   * @access public
+   * @param string $value The value to check
+   * @return bool true or false
+   */
+  public static function uuid($value) {
+    if (preg_match('/^[0-9a-f]{8}\-[0-9a-f]{4}\-[0-9a-f]{4}\-[0-9a-f]{4}\-[0-9a-f]{12}$/',$value)) {
+      return true;
+    }
+    return false;
+  }
+
 }
 
 # vim: tabstop=2 shiftwidth=2 softtabstop=2 expandtab
diff --git a/src/functions.php b/src/functions.php
index 14bad74..4efae8f 100644
--- a/src/functions.php
+++ b/src/functions.php
@@ -344,4 +344,30 @@ function implode_with_keys($values, $quoted=true, $separator=', ', $kv_separator
   return implode($separator, $result);
 }
 
+/**
+ * Generate UUID
+ * @return string UUID
+ */
+function generate_uuid() {
+  return sprintf( '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
+    // 32 bits for "time_low"
+    mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),
+
+    // 16 bits for "time_mid"
+    mt_rand( 0, 0xffff ),
+
+    // 16 bits for "time_hi_and_version",
+    // four most significant bits holds version number 4
+    mt_rand( 0, 0x0fff ) | 0x4000,
+
+    // 16 bits, 8 bits for "clk_seq_hi_res",
+    // 8 bits for "clk_seq_low",
+    // two most significant bits holds zero and one for variant DCE1.1
+    mt_rand( 0, 0x3fff ) | 0x8000,
+
+    // 48 bits for "node"
+    mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff )
+  );
+}
+
 # vim: tabstop=2 shiftwidth=2 softtabstop=2 expandtab