diff --git a/library/think/Collection.php b/library/think/Collection.php
index f872476f9ae26681ad23deb66ca9250bb282cf06..0ff1dfc0c4448dab91ded0664fd76167af532159 100644
--- a/library/think/Collection.php
+++ b/library/think/Collection.php
@@ -360,6 +360,7 @@ class Collection implements ArrayAccess, Countable, IteratorAggregate, JsonSeria
      * @param  mixed $offset 键名
      * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function offsetExists($offset)
     {
         return array_key_exists($offset, $this->items);
@@ -371,6 +372,7 @@ class Collection implements ArrayAccess, Countable, IteratorAggregate, JsonSeria
      * @param  mixed $offset 键名
      * @return mixed
      */
+    #[\ReturnTypeWillChange]
     public function offsetGet($offset)
     {
         return $this->items[$offset];
@@ -383,6 +385,7 @@ class Collection implements ArrayAccess, Countable, IteratorAggregate, JsonSeria
      * @param  mixed $value  值
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function offsetSet($offset, $value)
     {
         if (is_null($offset)) {
@@ -398,6 +401,7 @@ class Collection implements ArrayAccess, Countable, IteratorAggregate, JsonSeria
      * @param  mixed $offset 键名
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function offsetUnset($offset)
     {
         unset($this->items[$offset]);
@@ -408,6 +412,7 @@ class Collection implements ArrayAccess, Countable, IteratorAggregate, JsonSeria
      * @access public
      * @return int
      */
+    #[\ReturnTypeWillChange]
     public function count()
     {
         return count($this->items);
@@ -418,6 +423,7 @@ class Collection implements ArrayAccess, Countable, IteratorAggregate, JsonSeria
      * @access public
      * @return ArrayIterator
      */
+    #[\ReturnTypeWillChange]
     public function getIterator()
     {
         return new ArrayIterator($this->items);
@@ -428,6 +434,7 @@ class Collection implements ArrayAccess, Countable, IteratorAggregate, JsonSeria
      * @access public
      * @return array
      */
+    #[\ReturnTypeWillChange]
     public function jsonSerialize()
     {
         return $this->toArray();
diff --git a/library/think/Loader.php b/library/think/Loader.php
index d813a5d7bd1519eadf54de4150aa3030da4c9328..283a2807b31b149a2dee550170070b236dd8476c 100644
--- a/library/think/Loader.php
+++ b/library/think/Loader.php
@@ -613,7 +613,7 @@ class Loader
         if ($type) {
             $name = preg_replace_callback('/_([a-zA-Z])/', function ($match) {
                 return strtoupper($match[1]);
-            }, $name);
+            }, $name ?? '');
 
             return $ucfirst ? ucfirst($name) : lcfirst($name);
         }
diff --git a/library/think/Model.php b/library/think/Model.php
index 2dc27b48ab0d42a4755d3473ab2a696f641c2efc..068032d8ccf0f3a8444519234f6fd19e4d3644f9 100644
--- a/library/think/Model.php
+++ b/library/think/Model.php
@@ -2268,27 +2268,32 @@ abstract class Model implements \JsonSerializable, \ArrayAccess
     }
 
     // JsonSerializable
+    #[\ReturnTypeWillChange]
     public function jsonSerialize()
     {
         return $this->toArray();
     }
 
     // ArrayAccess
+    #[\ReturnTypeWillChange]
     public function offsetSet($name, $value)
     {
         $this->setAttr($name, $value);
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetExists($name)
     {
         return $this->__isset($name);
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetUnset($name)
     {
         $this->__unset($name);
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetGet($name)
     {
         return $this->getAttr($name);
diff --git a/library/think/Paginator.php b/library/think/Paginator.php
index 365556784a850d3074f1b07aab8fecb984939570..d19472eef975c6238b651c86e1ad083b87accf30 100644
--- a/library/think/Paginator.php
+++ b/library/think/Paginator.php
@@ -128,7 +128,7 @@ abstract class Paginator implements ArrayAccess, Countable, IteratorAggregate, J
         }
         $url = $path;
         if (!empty($parameters)) {
-            $url .= '?' . http_build_query($parameters, null, '&');
+            $url .= '?' . http_build_query($parameters, '', '&');
         }
         return $url . $this->buildFragment();
     }
@@ -304,6 +304,7 @@ abstract class Paginator implements ArrayAccess, Countable, IteratorAggregate, J
      * @return Traversable An instance of an object implementing <b>Iterator</b> or
      * <b>Traversable</b>
      */
+    #[\ReturnTypeWillChange]
     public function getIterator()
     {
         return new ArrayIterator($this->items->all());
@@ -314,6 +315,7 @@ abstract class Paginator implements ArrayAccess, Countable, IteratorAggregate, J
      * @param mixed $offset
      * @return bool
      */
+    #[\ReturnTypeWillChange]
     public function offsetExists($offset)
     {
         return $this->items->offsetExists($offset);
@@ -324,6 +326,7 @@ abstract class Paginator implements ArrayAccess, Countable, IteratorAggregate, J
      * @param mixed $offset
      * @return mixed
      */
+    #[\ReturnTypeWillChange]
     public function offsetGet($offset)
     {
         return $this->items->offsetGet($offset);
@@ -334,6 +337,7 @@ abstract class Paginator implements ArrayAccess, Countable, IteratorAggregate, J
      * @param mixed $offset
      * @param mixed $value
      */
+    #[\ReturnTypeWillChange]
     public function offsetSet($offset, $value)
     {
         $this->items->offsetSet($offset, $value);
@@ -345,6 +349,7 @@ abstract class Paginator implements ArrayAccess, Countable, IteratorAggregate, J
      * @return void
      * @since 5.0.0
      */
+    #[\ReturnTypeWillChange]
     public function offsetUnset($offset)
     {
         $this->items->offsetUnset($offset);
@@ -353,6 +358,7 @@ abstract class Paginator implements ArrayAccess, Countable, IteratorAggregate, J
     /**
      * Count elements of an object
      */
+    #[\ReturnTypeWillChange]
     public function count()
     {
         return $this->items->count();
@@ -388,6 +394,7 @@ abstract class Paginator implements ArrayAccess, Countable, IteratorAggregate, J
     /**
      * Specify data which should be serialized to JSON
      */
+    #[\ReturnTypeWillChange]
     public function jsonSerialize()
     {
         return $this->toArray();
diff --git a/library/think/Request.php b/library/think/Request.php
index 5997a763a1d72b39c613943e7fdecd00d60c761c..4baf026a4bdc1d7b0d66f6839ee8dec542c05ae1 100644
--- a/library/think/Request.php
+++ b/library/think/Request.php
@@ -1091,7 +1091,7 @@ class Request
         foreach ($filters as $filter) {
             if (is_callable($filter)) {
                 // 调用函数或者方法过滤
-                $value = call_user_func($filter, $value);
+                $value = call_user_func($filter, $value ?? '');
             } elseif (is_scalar($value)) {
                 if (false !== strpos($filter, '/')) {
                     // 正则过滤
diff --git a/library/think/Validate.php b/library/think/Validate.php
index 608e1e4a52aad92e1fa460756aa7fd5951dfc71b..11a1de9f714aae4101c39ae3b2e5e1757e8739cd 100644
--- a/library/think/Validate.php
+++ b/library/think/Validate.php
@@ -931,10 +931,10 @@ class Validate
         if (is_string($rule) && strpos($rule, ',')) {
             list($rule, $param) = explode(',', $rule);
         } elseif (is_array($rule)) {
-            $param = isset($rule[1]) ? $rule[1] : null;
+            $param = $rule[1] ?? 0;
             $rule  = $rule[0];
         } else {
-            $param = null;
+            $param = 0;
         }
         return false !== filter_var($value, is_int($rule) ? $rule : filter_id($rule), $param);
     }
diff --git a/library/think/db/Query.php b/library/think/db/Query.php
index 37310f5c32bc5d555c66194524a22ed3807d4c5a..4aa74eba21162e5c28dbc88e46823cf6f7217624 100644
--- a/library/think/db/Query.php
+++ b/library/think/db/Query.php
@@ -480,6 +480,7 @@ class Query
             $result = Cache::get($guid);
         }
         if (false === $result) {
+            $result = [];
             if (isset($this->options['field'])) {
                 unset($this->options['field']);
             }
diff --git a/library/traits/controller/Jump.php b/library/traits/controller/Jump.php
index 6a572246aafc2e81f9838a5241b27e91723a8762..019b520ad5440c4e571d01bec384b56e469ba879 100644
--- a/library/traits/controller/Jump.php
+++ b/library/traits/controller/Jump.php
@@ -38,8 +38,8 @@ trait Jump
     {
         if (is_null($url) && !is_null(Request::instance()->server('HTTP_REFERER'))) {
             $url = Request::instance()->server('HTTP_REFERER');
-        } elseif ('' !== $url && !strpos($url, '://') && 0 !== strpos($url, '/')) {
-            $url = Url::build($url);
+        } elseif ('' !== $url && !strpos($url ?? '', '://') && 0 !== strpos($url ?? '', '/')) {
+            $url = Url::build($url ?? '');
         }
 
         $type = $this->getResponseType();