add validation functions class

backend/app/plugins/wiaas/includes/admin/class-wiaas-admin-user-profile.php

@@ -13,7 +13,7 @@ class Wiaas_Admin_Profile {
 
         $phone = $_POST['phone'];
 
-        if (!WC_Validation::is_phone($phone)){
+        if (!Wiaas_Validation_Functions::is_phone($phone)){
             $errors->add('phone_error', __( '<strong>ERROR</strong>: Enter valid phone number.', 'crf' ));
         };
 

backend/app/plugins/wiaas/includes/api/class-wiaas-rest-customer.php

@@ -148,7 +148,7 @@ class Wiaas_REST_Customer_API {
 			return wiaas_api_notice('ADD_PHONE_NUMBER', 'error', Wiaas_Customer::get_customer_info($customer_id));
 		}
 
-        if (!WC_Validation::is_phone($phone)){
+        if (!Wiaas_Validation_Functions::is_phone($phone)){
             return wiaas_api_notice('INVALID_PHONE_NUMBER', 'error', Wiaas_Customer::get_customer_info($customer_id));
         };
 

backend/app/plugins/wiaas/includes/class-wiaas-validation-functions.php

@@ -0,0 +1,13 @@
+<?php
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Class Wiaas_Validation_Functions
+ */
+class Wiaas_Validation_Functions {
+
+    public static function is_phone($phone){
+        return WC_Validation::is_phone($phone);
+    }
+}

backend/app/plugins/wiaas/wiaas.php

@@ -59,6 +59,8 @@ include_once WIAAS_DIR . '/includes/class-wiass-templates.php';
 
 include_once WIAAS_DIR . '/includes/wiaas-class-measurement-units.php';
 
+include_once WIAAS_DIR . '/includes/class-wiaas-validation-functions.php';
+
 function wiaas_redirect_to_login() {
     wp_safe_redirect(get_site_url('', 'wp-login.php'));
 }