Fix Một số lỗi khi chạy trên php8.2 #63

Author: nguyenanhung

system/core/Input.php

@@ -907,8 +907,8 @@ public function is_cli_request()
 	public function method($upper = FALSE)
 	{
 		return ($upper)
-			? strtoupper($this->server('REQUEST_METHOD'))
-			: strtolower($this->server('REQUEST_METHOD'));
+			? strtoupper((string) $this->server('REQUEST_METHOD'))
+			: strtolower((string) $this->server('REQUEST_METHOD'));
 	}
 
 	// ------------------------------------------------------------------------

system/core/Security.php

@@ -220,14 +220,8 @@ public function __construct()
 	 */
 	public function csrf_verify()
 	{
-		if (isset($_SERVER['REQUEST_METHOD']) && $_SERVER['REQUEST_METHOD'] == ''){
-			$requestMethod = strtoupper((string) $_SERVER['REQUEST_METHOD']);
-		} else {
-			$requestMethod = '';
-		}
-
 		// If it's not a POST request we will set the CSRF cookie
-		if ($requestMethod !== 'POST') {
+		if (strtoupper((string) $_SERVER['REQUEST_METHOD']) !== 'POST') {
 			return $this->csrf_set_cookie();
 		}