From f1376e17cabc5381d0562d4fb2b7a51406e4188e Mon Sep 17 00:00:00 2001
From: twinh <twinhuang@qq.com>
Date: Sun, 12 Nov 2023 17:54:15 +0800
Subject: [PATCH] fix: PHP 8.1 Passing null to parameter of type string is
 deprecated

---
 lib/Http.php       | 2 +-
 lib/IsContains.php | 3 ++-
 lib/IsDir.php      | 3 ++-
 lib/IsExists.php   | 3 ++-
 lib/Req.php        | 2 +-
 lib/Res.php        | 4 ++--
 lib/WeChatApp.php  | 2 +-
 7 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/lib/Http.php b/lib/Http.php
index 3d8ffa474..a0f9d6e03 100644
--- a/lib/Http.php
+++ b/lib/Http.php
@@ -921,7 +921,7 @@ protected function prepareCurlOptions()
         if ($this->cookies) {
             $cookies = [];
             foreach ($this->cookies as $key => $value) {
-                $cookies[] = $key . '=' . rawurlencode($value);
+                $cookies[] = $key . '=' . rawurlencode($value ?? '');
             }
             $opts[\CURLOPT_COOKIE] = implode('; ', $cookies);
         }
diff --git a/lib/IsContains.php b/lib/IsContains.php
index d88221b37..59c723257 100644
--- a/lib/IsContains.php
+++ b/lib/IsContains.php
@@ -47,7 +47,8 @@ public function __invoke($input, $search = null, $regex = false)
      */
     protected function doValidate($input)
     {
-        if (!$this->isString($input)) {
+        $input = $this->toString($input);
+        if (null === $input) {
             $this->addError('notString');
             return false;
         }
diff --git a/lib/IsDir.php b/lib/IsDir.php
index fe749681f..2fd4c3299 100644
--- a/lib/IsDir.php
+++ b/lib/IsDir.php
@@ -27,7 +27,8 @@ class IsDir extends BaseValidator
      */
     protected function doValidate($input)
     {
-        if (!$this->isString($input)) {
+        $input = $this->toString($input);
+        if (null === $input) {
             $this->addError('notString');
             return false;
         }
diff --git a/lib/IsExists.php b/lib/IsExists.php
index d9216bba0..097b59705 100644
--- a/lib/IsExists.php
+++ b/lib/IsExists.php
@@ -27,7 +27,8 @@ class IsExists extends BaseValidator
      */
     protected function doValidate($input)
     {
-        if (!$this->isString($input)) {
+        $input = $this->toString($input);
+        if (null === $input) {
             $this->addError('notString');
             return false;
         }
diff --git a/lib/Req.php b/lib/Req.php
index 86d64572e..6b38d676e 100644
--- a/lib/Req.php
+++ b/lib/Req.php
@@ -842,7 +842,7 @@ public function getIterator(): \Traversable
      */
     public function accept($mine)
     {
-        return 0 === strpos($this->getServer('HTTP_ACCEPT'), $mine);
+        return 0 === strpos($this->getServer('HTTP_ACCEPT', ''), $mine);
     }
 
     /**
diff --git a/lib/Res.php b/lib/Res.php
index 341ab28af..28dd23058 100644
--- a/lib/Res.php
+++ b/lib/Res.php
@@ -591,7 +591,7 @@ public function redirect($url = null, $statusCode = 302, $options = [])
         $this->setOption($options);
 
         // The variables for custom redirect view
-        $escapedUrl = htmlspecialchars($url, \ENT_QUOTES, 'UTF-8');
+        $escapedUrl = $url ? htmlspecialchars($url, \ENT_QUOTES, 'UTF-8') : $url;
         $wait = (int) $this->redirectWait;
 
         // Location header does not support delay
@@ -716,7 +716,7 @@ public function download($file = null, array $downloadOptions = [])
         $name = rawurlencode($name);
 
         // For IE
-        $userAgent = $this->request->getServer('HTTP_USER_AGENT');
+        $userAgent = $this->request->getServer('HTTP_USER_AGENT', '');
         if (preg_match('/MSIE ([\w.]+)/', $userAgent)) {
             $filename = '=' . $name;
         } else {
diff --git a/lib/WeChatApp.php b/lib/WeChatApp.php
index 6a82f9dae..88885cad4 100644
--- a/lib/WeChatApp.php
+++ b/lib/WeChatApp.php
@@ -1029,7 +1029,7 @@ protected function arrayToXml(array $array, SimpleXMLElement $xml = null)
                 } else {
                     $child = $xml->addChild($key);
                     $node = dom_import_simplexml($child);
-                    $node->appendChild($node->ownerDocument->createCDATASection($value));
+                    $node->appendChild($node->ownerDocument->createCDATASection($value ?? ''));
                 }
             }
         }