Fix depricated warning on PHP 8.4

Author: sangnguyenplus

helpers/helpers.php

@@ -3,12 +3,12 @@
 use Kris\LaravelFormBuilder\Fields\FormField;
 use Kris\LaravelFormBuilder\Form;
 
-if(! function_exists('getFormBuilderViewPath')) {
+if (! function_exists('getFormBuilderViewPath')) {
     function getFormBuilderViewPath(string $fileName): string
     {
         $p = explode('.', $fileName);
         $c = count($p);
-        if($c > 2 || $p[$c - 1] != 'php') {
+        if ($c > 2 || $p[$c - 1] != 'php') {
             throw new Exception('You should use only *.php files with this function');
         }
 
@@ -18,7 +18,7 @@ function getFormBuilderViewPath(string $fileName): string
     }
 }
 
-if(! function_exists('errorBlockPath')) {
+if (! function_exists('errorBlockPath')) {
 
     function errorBlockPath(): string
     {
@@ -27,7 +27,7 @@ function errorBlockPath(): string
 
 }
 
-if(! function_exists('helpBlockPath')) {
+if (! function_exists('helpBlockPath')) {
 
     function helpBlockPath(): string
     {

src/Filters/Exception/InvalidInstanceException.php

@@ -13,7 +13,7 @@
  */
 class InvalidInstanceException extends \Exception
 {
-    public function __construct($message = '', $code = 0, Throwable $previous = null)
+    public function __construct($message = '', $code = 0, ?Throwable $previous = null)
     {
         $message = 'Filter object must implement ' . FilterInterface::class;
         parent::__construct($message, $code, $previous);

src/Filters/Exception/UnableToResolveFilterException.php

@@ -12,7 +12,7 @@
  */
 class UnableToResolveFilterException extends \Exception
 {
-    public function __construct($message = '', $code = 0, Throwable $previous = null)
+    public function __construct($message = '', $code = 0, ?Throwable $previous = null)
     {
         $message = "Passed filter can't be resolved.";
         parent::__construct($message, $code, $previous);

src/FormHelper.php

@@ -75,7 +75,7 @@ private function loadCustomTypes(): void
         }
     }
 
-    public function getConfig(string $key = null, string $default = null, array $customConfig = []): mixed
+    public function getConfig(?string $key = null, ?string $default = null, array $customConfig = []): mixed
     {
         $config = array_replace_recursive($this->config, $customConfig);
 

src/Rules.php

@@ -28,7 +28,7 @@ public function setFieldName(string $name): static
         return $this;
     }
 
-    public function addFieldRule($rule, string $fieldName = null): void
+    public function addFieldRule($rule, ?string $fieldName = null): void
     {
         $rules = $this->getFieldRules($fieldName);
         $rules[] = $rule;
@@ -57,7 +57,7 @@ protected function ensureFieldName(string $fieldName): ?string
         return $fieldName;
     }
 
-    public function setFieldRules(array $rules, string $fieldName = null): void
+    public function setFieldRules(array $rules, ?string $fieldName = null): void
     {
         $fieldName = $this->ensureFieldName($fieldName);
         $this->rules[$fieldName] = $rules;

src/Supports/FormBuilder.php

@@ -55,7 +55,7 @@ public function __construct(
         UrlGenerator $url,
         Factory $view,
         $csrfToken,
-        Request $request = null
+        ?Request $request = null
     ) {
         $this->url = $url;
         $this->html = $html;

src/Supports/HtmlBuilder.php

@@ -21,7 +21,7 @@ class HtmlBuilder
 
     protected Factory $view;
 
-    public function __construct(UrlGenerator $url = null, Factory $view)
+    public function __construct(?UrlGenerator $url = null, Factory $view)
     {
         $this->url = $url;
         $this->view = $view;