diff --git a/.php-cs-fixer.php b/.php-cs-fixer.php
index 24a62d81..4f55b144 100644
--- a/.php-cs-fixer.php
+++ b/.php-cs-fixer.php
@@ -1,5 +1,7 @@
 <?php
 
+use PhpCsFixer\Runner\Parallel\ParallelConfigFactory;
+
 $header = <<<EOF
 League.Uri (https://uri.thephpleague.com)
 
@@ -17,6 +19,7 @@
 $config = new PhpCsFixer\Config();
 
 return $config
+    ->setParallelConfig(ParallelConfigFactory::detect())
     ->setRules([
         '@PSR12' => true,
         'array_syntax' => ['syntax' => 'short'],
diff --git a/components/CHANGELOG.md b/components/CHANGELOG.md
index ee703ede..79ebe60d 100644
--- a/components/CHANGELOG.md
+++ b/components/CHANGELOG.md
@@ -2,6 +2,24 @@
 
 All Notable changes to `League\Uri\Components` will be documented in this file
 
+## [Next](https://github.com/thephpleague/uri-components/compare/7.4.1...master) - TBD
+
+### Added
+
+- `UrlSearchParams::uniqueKeyCount`
+
+### Fixed
+
+- None
+
+### Deprecated
+
+- None
+
+### Removed
+
+- None
+
 ## [7.4.1](https://github.com/thephpleague/uri-components/compare/7.4.0...7.4.1) - 2024-02-23
 
 ### Added
diff --git a/components/Components/HierarchicalPath.php b/components/Components/HierarchicalPath.php
index 820dfc50..b915e176 100644
--- a/components/Components/HierarchicalPath.php
+++ b/components/Components/HierarchicalPath.php
@@ -111,8 +111,7 @@ public static function fromAbsolute(string ...$segments): self
      */
     private static function fromSegments(int $pathType, array $segments): self
     {
-        $pathSegments = array_map(fn (Stringable|string $segment): string => (string) $segment, $segments);
-        $path = implode(self::SEPARATOR, $pathSegments);
+        $path = implode(self::SEPARATOR, $segments);
 
         return match (true) {
             self::IS_RELATIVE === $pathType => new self(ltrim($path, self::SEPARATOR)),
diff --git a/components/Components/URLSearchParams.php b/components/Components/URLSearchParams.php
index 5e062295..706ad279 100644
--- a/components/Components/URLSearchParams.php
+++ b/components/Components/URLSearchParams.php
@@ -375,6 +375,18 @@ public function isEmpty(): bool
         return 0 === $this->size();
     }
 
+    /**
+     * Returns the total number of distinct search parameter keys.
+     */
+    public function uniqueKeyCount(): int
+    {
+        return count(
+            array_count_values(
+                array_column([...$this->pairs], 0)
+            )
+        );
+    }
+
     /**
      * Returns the total number of search parameter entries.
      */
diff --git a/components/Components/URLSearchParamsTest.php b/components/Components/URLSearchParamsTest.php
index f20e8399..e9994e72 100644
--- a/components/Components/URLSearchParamsTest.php
+++ b/components/Components/URLSearchParamsTest.php
@@ -630,18 +630,22 @@ public function testSizeWithDeletionMethodAndBehaviour(): void
         self::assertCount(3, $params);
         self::assertTrue($params->isNotEmpty());
         self::assertFalse($params->isEmpty());
+        self::assertSame(2, $params->uniqueKeyCount());
 
         $params->delete('a');
         self::assertCount(1, $params);
+        self::assertSame(1, $params->uniqueKeyCount());
     }
 
     public function testSizeWithAdditionMethodAndBehaviour(): void
     {
         $params = new URLSearchParams('a=1&b=2&a=3');
         self::assertCount(3, $params);
+        self::assertSame(2, $params->uniqueKeyCount());
 
         $params->append('b', '4');
         self::assertCount(4, $params);
+        self::assertSame(2, $params->uniqueKeyCount());
     }
 
     public function testSizeWithEmptyInstance(): void
@@ -650,6 +654,7 @@ public function testSizeWithEmptyInstance(): void
         self::assertCount(0, $params);
         self::assertFalse($params->isNotEmpty());
         self::assertTrue($params->isEmpty());
+        self::assertSame(0, $params->uniqueKeyCount());
     }
 
     public function testBasicHasMethod(): void
diff --git a/composer.json b/composer.json
index 2de2f147..9db0ee34 100644
--- a/composer.json
+++ b/composer.json
@@ -28,19 +28,19 @@
         "ext-fileinfo": "*",
         "ext-gmp": "*",
         "ext-intl": "*",
-        "friendsofphp/php-cs-fixer": "^3.53.0",
+        "friendsofphp/php-cs-fixer": "^3.57.2",
         "guzzlehttp/psr7": "^2.6.2",
         "laminas/laminas-diactoros": "^3.3.1",
         "nyholm/psr7": "^1.8.1",
         "phpbench/phpbench": "^1.2.15",
-        "phpstan/phpstan": "^1.10.66",
-        "phpstan/phpstan-deprecation-rules": "^1.1.4",
-        "phpstan/phpstan-phpunit": "^1.3.16",
-        "phpstan/phpstan-strict-rules": "^1.5.3",
-        "phpunit/phpunit": "^10.5.17 || ^11.1.1",
-        "psr/http-factory": "^1.0.2",
+        "phpstan/phpstan": "^1.11.2",
+        "phpstan/phpstan-deprecation-rules": "^1.2.0",
+        "phpstan/phpstan-phpunit": "^1.4.0",
+        "phpstan/phpstan-strict-rules": "^1.6.0",
+        "phpunit/phpunit": "^10.5.17 || ^11.1.3",
+        "psr/http-factory": "^1.1.0",
         "psr/http-message": "^1.1.0 || ^2.0",
-        "symfony/var-dumper": "^6.4.6",
+        "symfony/var-dumper": "^6.4.7",
         "uri-templates/uritemplate-test": "dev-master"
     },
     "repositories": [
diff --git a/docs/components/7.0/urlsearchparams.md b/docs/components/7.0/urlsearchparams.md
index 0c441e66..c2cfb860 100644
--- a/docs/components/7.0/urlsearchparams.md
+++ b/docs/components/7.0/urlsearchparams.md
@@ -90,6 +90,7 @@ While the class implements all the methods define in the RFC, the following meth
 
 - `URLSearchParams::isEmpty`
 - `URLSearchParams::isNotEmpty`
+- `URLSearchParams::uniqueKeyCount` new in version `7.5.0`
 
 ~~~php
 use League\Uri\Components\URLSearchParams;
@@ -104,6 +105,7 @@ $params->has('foo', 'bar'); //returns true
 $params->has('foo', 'toto'); //returns false (the second parameter is the value of the pair)
 count($params); //returns 3
 $params->size();  //returns 3
+$params->uniqueKeyCount(); //returns 2
 $params->delete('foo');
 count($params); //returns 1 (because all the pairs which contains foo have been removed)
 $params->set('aha', true);
diff --git a/phpstan.neon b/phpstan.neon
index 7e2edea9..ac1c17bb 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -15,6 +15,6 @@ parameters:
 		  path: interfaces/IPv4/NativeCalculator.php
 		- message: '#function gmp_(.*)? expects (GMP|int)#'
 		  path: interfaces/IPv4/GMPCalculator.php
+		- identifier: missingType.iterableValue
 	reportUnmatchedIgnoredErrors: true
 	treatPhpDocTypesAsCertain: false
-	checkMissingIterableValueType: false