Merge branch 'master' of github.com:appwrite/appwrite into functions

src/Appwrite/Auth/OAuth2/PaypalSandbox.php

@@ -7,7 +7,7 @@ use Appwrite\Auth\OAuth2\Paypal;
 
 class PaypalSandbox extends Paypal
 {
-    protected environment = 'sandbox';
+    protected $environment = 'sandbox';
 
     /**
      * @return string

src/Appwrite/Network/Validator/Domain.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace Appwrite\Network\Validator;
+
+use Utopia\Validator;
+
+/**
+ * Domain
+ *
+ * Validate that an variable is a valid domain address
+ *
+ * @package Utopia\Validator
+ */
+class Domain extends Validator
+{
+    /**
+     * Get Description
+     *
+     * Returns validator description
+     *
+     * @return string
+     */
+    public function getDescription()
+    {
+        return 'Value must be a valid domain';
+    }
+
+    /**
+     * Is valid
+     *
+     * Validation will pass when $value is valid domain.
+     *
+     * Validates domain names against RFC 1034, RFC 1035, RFC 952, RFC 1123, RFC 2732, RFC 2181, and RFC 1123.
+     *
+     * @param  mixed $value
+     * @return bool
+     */
+    public function isValid($value)
+    {
+        if(empty($value)) {
+            return false;
+        }
+
+        if(!is_string($value)) {
+            return false;
+        }
+
+        if (\filter_var($value, FILTER_VALIDATE_DOMAIN) === false) {
+            return false;
+        }
+
+        return true;
+    }
+}