diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index d474c9e0..11c21352 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,29 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-     backupGlobals="false"
-     backupStaticAttributes="false"
-     beStrictAboutTestsThatDoNotTestAnything="false"
-     bootstrap="vendor/autoload.php"
-     colors="true"
-     convertErrorsToExceptions="true"
-     convertNoticesToExceptions="true"
-     convertWarningsToExceptions="true"
-     processIsolation="false"
-     stopOnFailure="false"
-     verbose="true"
-     xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
-
-    <testsuites>
-        <testsuite name="Tests">
-            <directory suffix="Test.php">./tests/</directory>
-        </testsuite>
-    </testsuites>
-    <coverage includeUncoveredFiles="false">
-        <include>
-            <directory suffix=".php">src/</directory>
-        </include>
-    </coverage>
-    <php>
-        <env name="APP_ENV" value="testing" />
-    </php>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" backupGlobals="false" beStrictAboutTestsThatDoNotTestAnything="false" bootstrap="vendor/autoload.php" colors="true" processIsolation="false" stopOnFailure="false" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd" cacheDirectory=".phpunit.cache" backupStaticProperties="false">
+  <testsuites>
+    <testsuite name="Tests">
+      <directory suffix="Test.php">./tests/</directory>
+    </testsuite>
+  </testsuites>
+  <php>
+    <env name="APP_ENV" value="testing"/>
+  </php>
+  <source>
+    <include>
+      <directory suffix=".php">src/</directory>
+    </include>
+  </source>
 </phpunit>
diff --git a/phpunit.xml.dist.bak b/phpunit.xml.dist.bak
new file mode 100644
index 00000000..d474c9e0
--- /dev/null
+++ b/phpunit.xml.dist.bak
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+     backupGlobals="false"
+     backupStaticAttributes="false"
+     beStrictAboutTestsThatDoNotTestAnything="false"
+     bootstrap="vendor/autoload.php"
+     colors="true"
+     convertErrorsToExceptions="true"
+     convertNoticesToExceptions="true"
+     convertWarningsToExceptions="true"
+     processIsolation="false"
+     stopOnFailure="false"
+     verbose="true"
+     xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+
+    <testsuites>
+        <testsuite name="Tests">
+            <directory suffix="Test.php">./tests/</directory>
+        </testsuite>
+    </testsuites>
+    <coverage includeUncoveredFiles="false">
+        <include>
+            <directory suffix=".php">src/</directory>
+        </include>
+    </coverage>
+    <php>
+        <env name="APP_ENV" value="testing" />
+    </php>
+</phpunit>
diff --git a/src/LaravelValidateServiceProvider.php b/src/LaravelValidateServiceProvider.php
index 24cd1c47..f61aad6e 100644
--- a/src/LaravelValidateServiceProvider.php
+++ b/src/LaravelValidateServiceProvider.php
@@ -40,10 +40,8 @@ class LaravelValidateServiceProvider extends ServiceProvider
 
     /**
      * Register files.
-     *
-     * @return void
      */
-    public function register()
+    public function register(): void
     {
         if ($this->app->runningInConsole()) {
             $this->publishLangFiles();
@@ -68,10 +66,8 @@ private function publishLangFiles(): void
 
     /**
      * Publish config file.
-     *
-     * @return void
      */
-    private function publishConfigFile()
+    private function publishConfigFile(): void
     {
         $this->publishes([
             __DIR__.'/../config/laravel-validate.php' => config_path('laravel-validate.php'),
diff --git a/src/Rules/ValidBase64.php b/src/Rules/ValidBase64.php
index 460e53cd..c30f8a5f 100644
--- a/src/Rules/ValidBase64.php
+++ b/src/Rules/ValidBase64.php
@@ -8,22 +8,16 @@ class ValidBase64 implements Rule
 {
     /**
      * Check base64.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return base64_encode(base64_decode($value, true)) === $value;
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.base64');
     }
diff --git a/src/Rules/ValidBitcoinAddress.php b/src/Rules/ValidBitcoinAddress.php
index 7be9a626..ce2bbfcd 100644
--- a/src/Rules/ValidBitcoinAddress.php
+++ b/src/Rules/ValidBitcoinAddress.php
@@ -7,23 +7,17 @@
 class ValidBitcoinAddress implements Rule
 {
     /**
-     * Check bitcoin address.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
+     * Check bitcoin address is valid.
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^(?:bc1|[13])[a-zA-HJ-NP-Z0-9]{25,39}$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.bitcoin-address');
     }
diff --git a/src/Rules/ValidCamelCase.php b/src/Rules/ValidCamelCase.php
index 5c92d9ac..4c84c9d2 100644
--- a/src/Rules/ValidCamelCase.php
+++ b/src/Rules/ValidCamelCase.php
@@ -8,22 +8,16 @@ class ValidCamelCase implements Rule
 {
     /**
      * Check value is camel case.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^(?:\p{Lu}?\p{Ll}+)(?:\p{Lu}\p{Ll}+)*$/u', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.camel-case');
     }
diff --git a/src/Rules/ValidCapitalCharWithNumber.php b/src/Rules/ValidCapitalCharWithNumber.php
index dd1e26b3..eced946f 100644
--- a/src/Rules/ValidCapitalCharWithNumber.php
+++ b/src/Rules/ValidCapitalCharWithNumber.php
@@ -8,22 +8,16 @@ class ValidCapitalCharWithNumber implements Rule
 {
     /**
      * Check all words are capital & with hyphen & number.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/[A-Z]{2,}-\d+/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.capital-char-with-number');
     }
diff --git a/src/Rules/ValidCarNumber.php b/src/Rules/ValidCarNumber.php
index 6aed527f..7c4c532d 100644
--- a/src/Rules/ValidCarNumber.php
+++ b/src/Rules/ValidCarNumber.php
@@ -8,22 +8,16 @@ class ValidCarNumber implements Rule
 {
     /**
      * Check car number is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^[A-Z]{2}[0-9]{2}[A-Z]{2}[0-9]{4}$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.car-number');
     }
diff --git a/src/Rules/ValidCartNumberIran.php b/src/Rules/ValidCartNumberIran.php
index 74fa388c..78971a59 100644
--- a/src/Rules/ValidCartNumberIran.php
+++ b/src/Rules/ValidCartNumberIran.php
@@ -8,12 +8,8 @@ class ValidCartNumberIran implements Rule
 {
     /**
      * Check cart number is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         $cardToArr = str_split($value);
         $cardTotal = 0;
@@ -31,10 +27,8 @@ public function passes($attribute, $value)
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.cart-number-iran');
     }
diff --git a/src/Rules/ValidCreditCard.php b/src/Rules/ValidCreditCard.php
index 684826f7..4c049ab8 100644
--- a/src/Rules/ValidCreditCard.php
+++ b/src/Rules/ValidCreditCard.php
@@ -8,12 +8,8 @@ class ValidCreditCard implements Rule
 {
     /**
      * Check if the credit card number is valid using the Luhn algorithm.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         $value = preg_replace('/\D/', '', $value);
 
@@ -37,10 +33,8 @@ public function passes($attribute, $value)
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.credit-card');
     }
diff --git a/src/Rules/ValidDiscordUsername.php b/src/Rules/ValidDiscordUsername.php
index d72cce7c..0c03778d 100644
--- a/src/Rules/ValidDiscordUsername.php
+++ b/src/Rules/ValidDiscordUsername.php
@@ -8,22 +8,16 @@ class ValidDiscordUsername implements Rule
 {
     /**
      * Check discord username is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^.{3,32}#[0-9]{4}$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.discord-username');
     }
diff --git a/src/Rules/ValidDomain.php b/src/Rules/ValidDomain.php
index ad2db125..504f1086 100644
--- a/src/Rules/ValidDomain.php
+++ b/src/Rules/ValidDomain.php
@@ -8,22 +8,16 @@ class ValidDomain implements Rule
 {
     /**
      * Check domain name is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^(?:[-A-Za-z0-9]+\.)+[A-Za-z]{2,6}$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.domain');
     }
diff --git a/src/Rules/ValidDuplicate.php b/src/Rules/ValidDuplicate.php
index d4198c9c..dcddbb22 100644
--- a/src/Rules/ValidDuplicate.php
+++ b/src/Rules/ValidDuplicate.php
@@ -8,12 +8,8 @@ class ValidDuplicate implements Rule
 {
     /**
      * Check duplicate value.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         $value = str_split($value);
 
@@ -22,10 +18,8 @@ public function passes($attribute, $value)
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.duplicate');
     }
diff --git a/src/Rules/ValidDuplicateCharacter.php b/src/Rules/ValidDuplicateCharacter.php
index 97572772..db934465 100644
--- a/src/Rules/ValidDuplicateCharacter.php
+++ b/src/Rules/ValidDuplicateCharacter.php
@@ -8,12 +8,8 @@ class ValidDuplicateCharacter implements Rule
 {
     /**
      * Check duplicate characters, splitted by comma.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         $value = explode(',', $value);
 
@@ -22,10 +18,8 @@ public function passes($attribute, $value)
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.duplicate_character');
     }
diff --git a/src/Rules/ValidEvenNumber.php b/src/Rules/ValidEvenNumber.php
index 18f3258f..a8278e00 100644
--- a/src/Rules/ValidEvenNumber.php
+++ b/src/Rules/ValidEvenNumber.php
@@ -8,22 +8,16 @@ class ValidEvenNumber implements Rule
 {
     /**
      * Check number is even.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^\d*[02468]$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.even-number');
     }
diff --git a/src/Rules/ValidHashtag.php b/src/Rules/ValidHashtag.php
index 48d3a642..20180415 100644
--- a/src/Rules/ValidHashtag.php
+++ b/src/Rules/ValidHashtag.php
@@ -8,22 +8,16 @@ class ValidHashtag implements Rule
 {
     /**
      * Check value contains hashtag.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^#[^ !@#$%^&*(),.?":{}|<>]*$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.hashtag');
     }
diff --git a/src/Rules/ValidHexColor.php b/src/Rules/ValidHexColor.php
index 43676156..69043cf2 100644
--- a/src/Rules/ValidHexColor.php
+++ b/src/Rules/ValidHexColor.php
@@ -8,22 +8,16 @@ class ValidHexColor implements Rule
 {
     /**
      * Check hex color is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^#?(?:[a-fA-F0-9]{6}|[a-fA-F0-9]{3})$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.hex-color');
     }
diff --git a/src/Rules/ValidHtmlTag.php b/src/Rules/ValidHtmlTag.php
index 8d24933d..41bdac7b 100644
--- a/src/Rules/ValidHtmlTag.php
+++ b/src/Rules/ValidHtmlTag.php
@@ -8,22 +8,16 @@ class ValidHtmlTag implements Rule
 {
     /**
      * Check html tag is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^<([a-z1-6]+)([^<]+)*(?:>(.*)<\/\1>| *\/>)$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.html-tag');
     }
diff --git a/src/Rules/ValidIban.php b/src/Rules/ValidIban.php
index ce2d59ac..e51f9781 100644
--- a/src/Rules/ValidIban.php
+++ b/src/Rules/ValidIban.php
@@ -15,7 +15,7 @@ class ValidIban implements Rule
      *
      * @var array|int[]
      */
-    private array $characterMap = [
+    protected array $characterMap = [
         'A' => 10,
         'B' => 11,
         'C' => 12,
@@ -171,23 +171,19 @@ public function __construct(array|string $countries = [])
     }
 
     /**
-     * Check IBAN.
+     * Check IBAN is valid.
      *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
+     * @see https://en.wikipedia.org/wiki/International_Bank_Account_Number
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return $this->isIbanValid($value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.iban');
     }
diff --git a/src/Rules/ValidImei.php b/src/Rules/ValidImei.php
index 3151a52c..79e7b6fa 100644
--- a/src/Rules/ValidImei.php
+++ b/src/Rules/ValidImei.php
@@ -8,12 +8,8 @@ class ValidImei implements Rule
 {
     /**
      * Check IMEI is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         $imei = $value;
 
@@ -40,10 +36,8 @@ public function passes($attribute, $value)
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.imei');
     }
diff --git a/src/Rules/ValidIpAddressIPV4.php b/src/Rules/ValidIpAddressIPV4.php
index 7b8e70ce..03c9e71a 100644
--- a/src/Rules/ValidIpAddressIPV4.php
+++ b/src/Rules/ValidIpAddressIPV4.php
@@ -8,22 +8,16 @@ class ValidIpAddressIPV4 implements Rule
 {
     /**
      * Check ip address (ipv4) is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/(?:\b25[0-5]|\b2[0-4][0-9]|\b[01]?[0-9][0-9]?)(?:\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.ipv4');
     }
diff --git a/src/Rules/ValidIpAddressIPV6.php b/src/Rules/ValidIpAddressIPV6.php
index d9486ac6..e2c877d9 100644
--- a/src/Rules/ValidIpAddressIPV6.php
+++ b/src/Rules/ValidIpAddressIPV6.php
@@ -8,22 +8,16 @@ class ValidIpAddressIPV6 implements Rule
 {
     /**
      * Check ip address (ipv6) is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
-        return preg_match('/(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))/', $value);
+        return preg_match('/(([0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.ipv6');
     }
diff --git a/src/Rules/ValidIranPostalCode.php b/src/Rules/ValidIranPostalCode.php
index 5b244138..8be71539 100644
--- a/src/Rules/ValidIranPostalCode.php
+++ b/src/Rules/ValidIranPostalCode.php
@@ -8,22 +8,16 @@ class ValidIranPostalCode implements Rule
 {
     /**
      * Check postal code is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^(?!(\d)\1{3})[13-9]{4}[1346-9][013-9]{5}$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.postal-code');
     }
diff --git a/src/Rules/ValidJalaliDate.php b/src/Rules/ValidJalaliDate.php
index 550cde7e..5f3642c7 100644
--- a/src/Rules/ValidJalaliDate.php
+++ b/src/Rules/ValidJalaliDate.php
@@ -8,16 +8,13 @@ class ValidJalaliDate implements Rule
 {
     public function __construct(
         public string $character = '/',
-    ) {}
+    ) {
+    }
 
     /**
      * Check jalali date is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         if (! is_string($value)) {
             return false;
@@ -34,10 +31,8 @@ public function passes($attribute, $value)
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.jalali_date');
     }
diff --git a/src/Rules/ValidJwt.php b/src/Rules/ValidJwt.php
index 1f8ce680..a7cf19b3 100644
--- a/src/Rules/ValidJwt.php
+++ b/src/Rules/ValidJwt.php
@@ -8,22 +8,16 @@ class ValidJwt implements Rule
 {
     /**
      * Check jwt is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^[a-zA-Z0-9-_]+\.[a-zA-Z0-9-_]+\.[a-zA-Z0-9-_]+$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.jwt');
     }
diff --git a/src/Rules/ValidKebabCase.php b/src/Rules/ValidKebabCase.php
index 2d006d55..5cf3e097 100644
--- a/src/Rules/ValidKebabCase.php
+++ b/src/Rules/ValidKebabCase.php
@@ -8,22 +8,16 @@ class ValidKebabCase implements Rule
 {
     /**
      * Check value is kebab case.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^(?:\p{Ll}+\-)*\p{Ll}+$/u', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.kebab-case');
     }
diff --git a/src/Rules/ValidNameDaysWeek.php b/src/Rules/ValidNameDaysWeek.php
index bf9d36c4..9d29d109 100644
--- a/src/Rules/ValidNameDaysWeek.php
+++ b/src/Rules/ValidNameDaysWeek.php
@@ -8,22 +8,16 @@ class ValidNameDaysWeek implements Rule
 {
     /**
      * Check day is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^(?:sun(?:day)?|mon(?:day)?|tue(?:sday)?|wed(?:nesday)?|thu(?:rsday)?|fri(?:day)?|sat(?:urday)?)$/i', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.name-days-week');
     }
diff --git a/src/Rules/ValidNationalCard.php b/src/Rules/ValidNationalCard.php
index 5f633d87..80305504 100644
--- a/src/Rules/ValidNationalCard.php
+++ b/src/Rules/ValidNationalCard.php
@@ -8,12 +8,8 @@ class ValidNationalCard implements Rule
 {
     /**
      * Check national card is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         if (! preg_match('/^\d{10}$/', $value)) {
             return false;
@@ -37,10 +33,8 @@ public function passes($attribute, $value)
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.national-card');
     }
diff --git a/src/Rules/ValidOddNumber.php b/src/Rules/ValidOddNumber.php
index fbac8603..48e0a283 100644
--- a/src/Rules/ValidOddNumber.php
+++ b/src/Rules/ValidOddNumber.php
@@ -8,22 +8,16 @@ class ValidOddNumber implements Rule
 {
     /**
      * Check number is odd.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^\d*[13579]$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.odd-number');
     }
diff --git a/src/Rules/ValidPascalCase.php b/src/Rules/ValidPascalCase.php
index 20acf6f2..0a8dce4e 100644
--- a/src/Rules/ValidPascalCase.php
+++ b/src/Rules/ValidPascalCase.php
@@ -7,23 +7,17 @@
 class ValidPascalCase implements Rule
 {
     /**
-     * Check pascal-case.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
+     * Check pascal-case is valid.
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^[A-Z][a-z]+(?:[A-Z][a-z]+)*$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.pascal-case');
     }
diff --git a/src/Rules/ValidPattern.php b/src/Rules/ValidPattern.php
index 09362349..a40ec89e 100644
--- a/src/Rules/ValidPattern.php
+++ b/src/Rules/ValidPattern.php
@@ -8,20 +8,16 @@ class ValidPattern implements Rule
 {
     public function __construct(
         private int $length,
-        private string $seperator = '-'
+        private string $separator = '-'
     ) {
     }
 
     /**
-     * Check texts with specific pattern.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
+     * Check text with specific pattern.
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
-        $texts = explode($this->seperator, $value);
+        $texts = explode($this->separator, $value);
 
         foreach ($texts as $text) {
             if (strlen($text) !== $this->length) {
@@ -34,10 +30,8 @@ public function passes($attribute, $value)
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.pattern');
     }
diff --git a/src/Rules/ValidPhoneNumber.php b/src/Rules/ValidPhoneNumber.php
index 59742973..5732ec92 100644
--- a/src/Rules/ValidPhoneNumber.php
+++ b/src/Rules/ValidPhoneNumber.php
@@ -13,12 +13,8 @@ public function __construct(protected ?string $code = null)
 
     /**
      * Check phone number is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         if (is_string($this->code)) {
             $passes = (new CountryPhoneCallback($value, $this->code))->callPhoneValidator();
@@ -26,15 +22,13 @@ public function passes($attribute, $value)
             return collect($passes)->some(fn ($passe) => $passe);
         }
 
-        return preg_match('/^[\+]?[(]?[0-9]{3}[)]?[-\s\.]?[0-9]{3}[-\s\.]?[0-9]{4,6}$/', $value);
+        return preg_match('/^[+]?[(]?[0-9]{3}[)]?[-\s.]?[0-9]{3}[-\s.]?[0-9]{4,6}$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.phone-number');
     }
diff --git a/src/Rules/ValidPort.php b/src/Rules/ValidPort.php
index a5279ec9..7040f158 100644
--- a/src/Rules/ValidPort.php
+++ b/src/Rules/ValidPort.php
@@ -8,22 +8,16 @@ class ValidPort implements Rule
 {
     /**
      * Check port is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^((6553[0-5])|(655[0-2][0-9])|(65[0-4][0-9]{2})|(6[0-4][0-9]{3})|([1-5][0-9]{4})|([0-5]{0,5})|([0-9]{1,4}))$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.port');
     }
diff --git a/src/Rules/ValidSlashEndOfString.php b/src/Rules/ValidSlashEndOfString.php
index 1df0369e..1dfb82d1 100644
--- a/src/Rules/ValidSlashEndOfString.php
+++ b/src/Rules/ValidSlashEndOfString.php
@@ -8,22 +8,16 @@ class ValidSlashEndOfString implements Rule
 {
     /**
      * Check write slash at the end of string.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/\/+$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.slash-end-of-string');
     }
diff --git a/src/Rules/ValidSlug.php b/src/Rules/ValidSlug.php
index 9645cf0b..9fe3bc8f 100644
--- a/src/Rules/ValidSlug.php
+++ b/src/Rules/ValidSlug.php
@@ -8,22 +8,16 @@ class ValidSlug implements Rule
 {
     /**
      * Check slug is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^[a-z0-9]+(?:-[a-z0-9]+)*$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.slug');
     }
diff --git a/src/Rules/ValidSnakeCase.php b/src/Rules/ValidSnakeCase.php
index e82e0d60..b08571c8 100644
--- a/src/Rules/ValidSnakeCase.php
+++ b/src/Rules/ValidSnakeCase.php
@@ -8,22 +8,16 @@ class ValidSnakeCase implements Rule
 {
     /**
      * Check value is snake case.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^(?:\p{Ll}+_)*\p{Ll}+$/u', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.snake-case');
     }
diff --git a/src/Rules/ValidStrongPassword.php b/src/Rules/ValidStrongPassword.php
index 4fda294e..d23bb1ec 100644
--- a/src/Rules/ValidStrongPassword.php
+++ b/src/Rules/ValidStrongPassword.php
@@ -8,22 +8,16 @@ class ValidStrongPassword implements Rule
 {
     /**
      * Check password started by capital letters & contains lowercase letters & contains number.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])(?=.*?[#?!@$ %^&*-]).{6,}$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.strong-password');
     }
diff --git a/src/Rules/ValidUlid.php b/src/Rules/ValidUlid.php
index 620d51d1..ed801fd9 100644
--- a/src/Rules/ValidUlid.php
+++ b/src/Rules/ValidUlid.php
@@ -7,23 +7,17 @@
 class ValidUlid implements Rule
 {
     /**
-     * Check ulid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
+     * Check ulid is valid.
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/[0-7][0-9A-HJKMNP-TV-Z]{25}/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.ulid');
     }
diff --git a/src/Rules/ValidUrl.php b/src/Rules/ValidUrl.php
index 9738b758..1d3acdee 100644
--- a/src/Rules/ValidUrl.php
+++ b/src/Rules/ValidUrl.php
@@ -8,22 +8,16 @@ class ValidUrl implements Rule
 {
     /**
      * Check url is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()!@:%_\+.~#?&\/\/=]*)/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.url');
     }
diff --git a/src/Rules/ValidUsername.php b/src/Rules/ValidUsername.php
index 9e1c8b40..35c3dfbe 100644
--- a/src/Rules/ValidUsername.php
+++ b/src/Rules/ValidUsername.php
@@ -8,22 +8,16 @@ class ValidUsername implements Rule
 {
     /**
      * It checks that the length of the username must be between 3 and 15 characters without spaces.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^[a-z0-9_-]{3,15}$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.username');
     }
diff --git a/src/Rules/ValidUuid.php b/src/Rules/ValidUuid.php
index 2501d85c..022ddba7 100644
--- a/src/Rules/ValidUuid.php
+++ b/src/Rules/ValidUuid.php
@@ -8,22 +8,16 @@ class ValidUuid implements Rule
 {
     /**
      * Check uuid is valid.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         return preg_match('/^[0-9a-fA-F]{8}\b-[0-9a-fA-F]{4}\b-[0-9a-fA-F]{4}\b-[0-9a-fA-F]{4}\b-[0-9a-fA-F]{12}$/', $value);
     }
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.uuid');
     }
diff --git a/src/Rules/ValidVatId.php b/src/Rules/ValidVatId.php
index 19405bb5..e6e23f52 100644
--- a/src/Rules/ValidVatId.php
+++ b/src/Rules/ValidVatId.php
@@ -8,12 +8,8 @@ class ValidVatId implements Rule
 {
     /**
      * Check VAT ID for validity.
-     *
-     * @param  string  $attribute
-     * @param  mixed  $value
-     * @return bool
      */
-    public function passes($attribute, $value)
+    public function passes($attribute, $value): bool
     {
         // Remove all characters except letters and numbers
         $value = preg_replace('/[^a-zA-Z0-9]/', '', $value);
@@ -23,10 +19,8 @@ public function passes($attribute, $value)
 
     /**
      * Get the validation error message.
-     *
-     * @return string
      */
-    public function message()
+    public function message(): string
     {
         return __('validate.vat-id');
     }
diff --git a/src/Traits/IbanTrait.php b/src/Traits/IbanTrait.php
index 0bec9bb4..f3f00f69 100644
--- a/src/Traits/IbanTrait.php
+++ b/src/Traits/IbanTrait.php
@@ -6,10 +6,8 @@ trait IbanTrait
 {
     /**
      * Set value of $countries property.
-     *
-     * @return void
      */
-    private function setCountries(?array $countries)
+    private function setCountries(?array $countries): void
     {
         if (empty($countries)) {
             $this->countries = [];
@@ -28,10 +26,8 @@ private function setCountries(?array $countries)
 
     /**
      * Check IBAN is valid.
-     *
-     * @return bool
      */
-    private function isIbanValid(string $iban)
+    private function isIbanValid(string $iban): bool
     {
         if (! $this->checkIbanFormat($iban)) {
             return false;
@@ -52,10 +48,8 @@ private function isIbanValid(string $iban)
 
     /**
      * Check IBAN format is valid.
-     *
-     * @return bool
      */
-    private function checkIbanFormat(string $iban)
+    private function checkIbanFormat(string $iban): bool
     {
         if (empty($iban)) {
             return false;
@@ -71,40 +65,32 @@ private function checkIbanFormat(string $iban)
 
     /**
      * Get IBAN country code.
-     *
-     * @return string
      */
-    private function getIbanCountryCode(string $iban)
+    private function getIbanCountryCode(string $iban): string
     {
         return substr($iban, 0, 2);
     }
 
     /**
      * Check if bcmod function is available.
-     *
-     * @return bool
      */
-    private function checkIfBcmodIsAvailable()
+    private function checkIfBcmodIsAvailable(): bool
     {
         return function_exists('bcmod');
     }
 
     /**
      * Check two first character's validity.
-     *
-     * @return bool
      */
-    private function twoFirstCharactersValid(string $countryCode)
+    private function twoFirstCharactersValid(string $countryCode): bool
     {
         return ! empty($countryCode) && ctype_alpha($countryCode);
     }
 
     /**
      * Check countries of the IBAN.
-     *
-     * @return bool
      */
-    private function isCountriesValid(string $ibanCountryCode)
+    private function isCountriesValid(string $ibanCountryCode): bool
     {
         if (empty($this->countries)) {
             return true;
@@ -121,10 +107,8 @@ private function isCountriesValid(string $ibanCountryCode)
 
     /**
      * Check country of the IBAN.
-     *
-     * @return bool
      */
-    private function isCountryValid(string $country, string $ibanCountryCode)
+    private function isCountryValid(string $country, string $ibanCountryCode): bool
     {
         return ! empty($country)
             && isset($this->ibanLengthByCountry[$country])
@@ -133,10 +117,8 @@ private function isCountryValid(string $country, string $ibanCountryCode)
 
     /**
      * Check country of the IBAN.
-     *
-     * @return bool
      */
-    private function isIbanLengthValid(string $iban, string $ibanCountryCode)
+    private function isIbanLengthValid(string $iban, string $ibanCountryCode): bool
     {
         return strlen($iban) === $this->ibanLengthByCountry[$ibanCountryCode];
     }
diff --git a/src/Utils/CountryPhoneCallback.php b/src/Utils/CountryPhoneCallback.php
index b03a9d14..8834e2e1 100644
--- a/src/Utils/CountryPhoneCallback.php
+++ b/src/Utils/CountryPhoneCallback.php
@@ -6,9 +6,6 @@ class CountryPhoneCallback
 {
     /**
      * Create a new phone validator instance.
-     *
-     * @param  mixed  $value  The phone number to validate.
-     * @param  string  $code  The country codes to validate against. String can be separated by comma
      */
     public function __construct(private mixed $value, private string $code, ?string $attribute = null)
     {
@@ -18,170 +15,136 @@ public function __construct(private mixed $value, private string $code, ?string
 
     /**
      * Validate Iran phone number.
-     *
-     * @return false|int
      */
-    protected function validateIR()
+    protected function validateIR(): false|int
     {
         return preg_match('/^(\+98|0)?9\d{9}$/', $this->value);
     }
 
     /**
      * Validate Iran phone number.
-     *
-     * @return false|int
      */
-    protected function validateEN()
+    protected function validateEN(): false|int
     {
         return preg_match('/^(?:\+44|0)7\d{9}$/', $this->value);
     }
 
     /**
      * Validate Nigeria phone number.
-     *
-     * @return false|int
      */
-    protected function validateNE()
+    protected function validateNE(): false|int
     {
         return preg_match('/^(\+227|00227|227)?\d{8}$/', $this->value);
     }
 
     /**
      * Validate Saudi Arabia phone number.
-     *
-     * @return false|int
      */
-    protected function validateSA()
+    protected function validateSA(): false|int
     {
         return preg_match('/^((\+966)|0)?5\d{8}$/', $this->value);
     }
 
     /**
      * Validate Germany phone number.
-     *
-     * @return false|int
      */
-    protected function validateDE()
+    protected function validateDE(): false|int
     {
         return preg_match('/^((\+49)|(0))(1|15|16|17|19|30|31|32|33|34|40|41|42|43|44|49|151|152|153|155|156|157|159|160|162|163|180|181|182|183|184|185|186|187|188|170|171|172|173|174|175|176|177|178|179)\d{7,8}$/', $this->value);
     }
 
     /**
      * Validate Greece phone number.
-     *
-     * @return false|int
      */
-    protected function validateGR()
+    protected function validateGR(): false|int
     {
         return preg_match('/^\+30[2-9]\d{2}\d{3}\d{4}$/', $this->value);
     }
 
     /**
      * Validate Spain phone number.
-     *
-     * @return false|int
      */
-    protected function validateES()
+    protected function validateES(): false|int
     {
         return preg_match('/^(?:\+34|0034|34)?[6789]\d{8}$/', $this->value);
     }
 
     /**
      * Validate France phone number.
-     *
-     * @return false|int
      */
-    protected function validateFR()
+    protected function validateFR(): false|int
     {
-        return preg_match('/^(?:\+33|0033|0)(?:(?:[1-9](?:\d{2}){4})|(?:[67]\d{8}))$/', $this->value);
+        return preg_match('/^(?:\+33|0033|0)(?:[1-9](?:\d{2}){4}|[67]\d{8})$/', $this->value);
     }
 
     /**
      * Validate India phone number.
-     *
-     * @return false|int
      */
-    protected function validateIN()
+    protected function validateIN(): false|int
     {
         return preg_match('/^(?:(?:\+|0{0,2})91(\s|-)?)?[6789]\d{9}$/', $this->value);
     }
 
     /**
      * Validate Indonesia phone number.
-     *
-     * @return false|int
      */
-    protected function validateID()
+    protected function validateID(): false|int
     {
         return preg_match('/^(?:\+62|0)(?:\d{2,3}\s?){1,2}\d{4,8}$/', $this->value);
     }
 
     /**
      * Validate Italy phone number.
-     *
-     * @return false|int
      */
-    protected function validateIT()
+    protected function validateIT(): false|int
     {
         return preg_match('/^\+39\d{8,10}$/', $this->value);
     }
 
     /**
      * Validate Japanese phone number.
-     *
-     * @return false|int
      */
-    protected function validateJA()
+    protected function validateJA(): false|int
     {
         return preg_match('/(\d{2,3})-?(\d{3,4})-?(\d{4})/', $this->value);
     }
 
     /**
      * Validate Korean phone number.
-     *
-     * @return false|int
      */
-    protected function validateKO()
+    protected function validateKO(): false|int
     {
         return preg_match('/^(?:\+82|0)(?:10|1[1-9])-?\d{3,4}-?\d{4}$/', $this->value);
     }
 
     /**
      * Validate Russian phone number.
-     *
-     * @return false|int
      */
-    protected function validateRU()
+    protected function validateRU(): false|int
     {
         return preg_match('/^(?:\+7|8)(?:\s?\(?\d{3}\)?\s?\d{3}(?:-?\d{2}){2}|\s?\d{2}(?:\s?\d{2}){3})$/', $this->value);
     }
 
     /**
      * Validate Sweden phone number.
-     *
-     * @return false|int
      */
-    protected function validateSE()
+    protected function validateSE(): false|int
     {
         return preg_match('/^(?:\+46|0) ?(?:[1-9]\d{1,2}-?\d{2}(?:\s?\d{2}){2}|7\d{2}-?\d{2}(?:\s?\d{2}){2})$/', $this->value);
     }
 
     /**
      * Validate Turkey phone number.
-     *
-     * @return false|int
      */
-    protected function validateTR()
+    protected function validateTR(): false|int
     {
         return preg_match('/^(?:\+90|0)(?:\s?[1-9]\d{2}\s?\d{3}\s?\d{2}\s?\d{2}|[1-9]\d{2}-?\d{3}-?\d{2}-?\d{2})$/', $this->value);
     }
 
     /**
      * Validate Chinese phone number.
-     *
-     * @return false|int
      */
-    protected function validateZH()
+    protected function validateZH(): false|int
     {
         return preg_match('/^(?:\+86)?1[3-9]\d{9}$/', $this->value);
     }
@@ -189,8 +152,6 @@ protected function validateZH()
     /**
      * Call the phone validator method for each country code and return the results.
      *
-     * @return array An array of validation results, where each key is a country code and the value is either `true` or `false`.
-     *
      * @throws \BadMethodCallException if the validator method for a country code does not exist.
      */
     public function callPhoneValidator(): array