+    # Pruefung, ob es ein Pflichtfeld ist\r
+\r
+    if(!$user_field_content) {\r
+        if(isset($user_field_data['required']) && $user_field_data['required']) {\r
+            if(isset($user_field_data['errors']['not_set'])) {\r
+                show_user_error($user_field_data['errors']['not_set']);\r
+            }\r
+            else {\r
+                show_fatal($err_indiv_errmsg_miss,array('ERRMSG' => 'not_set', 'INDIVIDUAL' => $user_field));\r
+            }\r
+        }\r
+        else {\r
+            # Wenn das Feld optional ist und nicht gesetzt wurde, brechen wir hier ab\r
+            # und machen mit dem naechsten Feld weiter\r
+\r
+            $prepared_user_fields[$user_field_data['tpl_var']] = '';\r
+            continue;\r
+        }\r
+    }\r
+\r
+    # Laengen-Pruefung\r
+\r
+    if(isset($user_field_data['min']) && $user_field_data['min']) {\r
+        if(strlen($user_field_content) < $user_field_data['min']) {\r
+            if(isset($user_field_data['errors']['too_short'])) {\r
+                show_user_error($user_field_data['errors']['too_short']);\r
+            }\r
+            else {\r
+                show_fatal($err_indiv_errmsg_miss,array('ERRMSG' => 'too_short', 'INDIVIDUAL' => $user_field));\r
+            }\r
+        }\r
+    }\r
+\r
+    if(isset($user_field_data['min']) && $user_field_data['max']) {\r
+        if(strlen($user_field_content) > $user_field_data['max']) {\r
+            if(isset($user_field_data['errors']['too_long'])) {\r
+                show_user_error($user_field_data['errors']['too_long']);\r
+            }\r
+            else {\r
+                show_fatal($err_indiv_errmsg_miss,array('ERRMSG' => 'too_long', 'INDIVIDUAL' => $user_field));\r
+            }\r
+        }\r
+    }\r
+\r
+    # Pruefung gegen frei definierbare Pruef-Funktion\r
+\r