diff --git a/verify.php b/verify.php
index d38f8d1..2877258 100644
--- a/verify.php
+++ b/verify.php
@@ -9,6 +9,15 @@ class verify
   /////////////////
   //   NETWORK   //
   /////////////////
+  /** Check if $val is a valid IPv4
+      Return TRUE or FALSE */
+  public function is_ip ($val)
+  {
+    if (filter_var ($val, FILTER_VALIDATE_IP))
+      return TRUE;
+    return FALSE;
+  }
+
   /** Check if $val is a valid IPv4
       Return TRUE or FALSE */
   public function is_ipv4 ($val)
@@ -27,6 +36,59 @@ class verify
     return FALSE;
   }
 
+  /** Check if $val is a valid hostname (without domain)
+      Return TRUE or FALSE */
+  public function is_hostname ($val)
+  {
+    if (strlen ($val) < 2 || strlen ($val) > 128)
+      return FALSE;
+    if (strspn ($val, "abcdefghijklmnopqrstuvwxyz".
+                      "ABCDEFGHIJKLMNOPQRSTUVWXYZ".
+                      "0123456789-.") !==
+      strlen ($val))
+      return FALSE;
+    // No end dot ?
+    if (substr ($val, -1) === ".")
+      return FALSE;
+    return TRUE;
+  }
+
+  /** Check if $val is a valid domain (without hostname)
+      Return TRUE or FALSE */
+  public function is_domain ($val)
+  {
+    if (strlen ($val) < 2 || strlen ($val) > 128)
+      return FALSE;
+    if (strspn ($val, "abcdefghijklmnopqrstuvwxyz".
+                      "ABCDEFGHIJKLMNOPQRSTUVWXYZ".
+                      "0123456789-.") !==
+      strlen ($val))
+      return FALSE;
+    // No end dot ?
+    if (substr ($val, -1) === ".")
+      return FALSE;
+    return TRUE;
+  }
+
+  /** Check if $val is a valid FQDN
+      Return TRUE or FALSE */
+  public function is_FQDN ($val)
+  {
+    if (strlen ($val) < 2 || strlen ($val) > 255)
+      return FALSE;
+    if ($this->is_ip ($val))
+      return FALSE;
+    if (strspn ($val, "abcdefghijklmnopqrstuvwxyz".
+                      "ABCDEFGHIJKLMNOPQRSTUVWXYZ".
+                      "0123456789-.") !==
+      strlen ($val))
+      return FALSE;
+    // No end dot ?
+    if (substr ($val, -1) === ".")
+      return FALSE;
+    return TRUE;
+  }
+
   ///////////////
   //   DATES   //
   ///////////////