improvements on some lines of code.

Author: irfanevrens

.gitignore

@@ -6,3 +6,4 @@ vendor
 docs
 *~
 build
+.idea

src/Pdp/Parser.php

@@ -205,19 +205,19 @@ protected function getRawPublicSuffix($host)
     public function getPublicSuffix($host)
     {
         if (strpos($host, '.') === 0) {
-            return;
+            return null;
         }
 
         // Fixes #22: If a single label domain makes it this far (e.g.,
         // localhost, foo, etc.), this stops it from incorrectly being set as
         // the public suffix.
         if (!$this->isMutliLabelDomain($host)) {
-            return;
+            return null;
         }
 
         // Fixes #43
         if ($this->isIpv4Address($host)) {
-            return;
+            return null;
         }
 
         $suffix = $this->getRawPublicSuffix($host);
@@ -254,18 +254,18 @@ public function isSuffixValid($host)
      *
      * @param string $host host
      *
-     * @return string registerable domain
+     * @return string|null registerable domain
      */
     public function getRegisterableDomain($host)
     {
         if (strpos($host, '.') === false) {
-            return;
+            return null;
         }
 
         $publicSuffix = $this->getPublicSuffix($host);
 
         if ($publicSuffix === null || $host == $publicSuffix) {
-            return;
+            return null;
         }
 
         $publicSuffixParts = array_reverse(explode('.', $publicSuffix));
@@ -280,14 +280,14 @@ public function getRegisterableDomain($host)
      *
      * @param string $host host
      *
-     * @return string subdomain
+     * @return string|null subdomain
      */
     public function getSubdomain($host)
     {
         $registerableDomain = $this->getRegisterableDomain($host);
 
         if ($registerableDomain === null || $host === $registerableDomain) {
-            return;
+            return null;
         }
 
         $registerableDomainParts = array_reverse(explode('.', $registerableDomain));

src/Pdp/PublicSuffixListManager.php

@@ -11,8 +11,6 @@
 
 namespace Pdp;
 
-use Pdp\HttpAdapter\HttpAdapterInterface;
-
 /**
  * Public Suffix List Manager.
  *

src/Pdp/Uri/Url.php

@@ -169,9 +169,9 @@ public function toArray()
             'user' => $this->user,
             'pass' => $this->pass,
             'host' => $this->host->__toString(),
-            'subdomain' => $this->host->subdomain,
-            'registerableDomain' => $this->host->registerableDomain,
-            'publicSuffix' => $this->host->publicSuffix,
+            'subdomain' => $this->host->getSubdomain(),
+            'registerableDomain' => $this->host->getRegisterableDomain(),
+            'publicSuffix' => $this->host->getPublicSuffix(),
             'port' => $this->port,
             'path' => $this->path,
             'query' => $this->query,

src/Pdp/Uri/Url/Host.php

@@ -98,4 +98,44 @@ public function __get($name)
     {
         return $this->$name;
     }
+
+	/**
+	 * Get Subdomain.
+	 *
+	 * @return null|string
+	 */
+	public function getSubdomain()
+	{
+		return $this->subdomain;
+	}
+
+	/**
+	 * Get Registerable domain.
+	 *
+	 * @return null|string
+	 */
+	public function getRegisterableDomain()
+	{
+		return $this->registerableDomain;
+	}
+
+	/**
+	 * Get Public suffix.
+	 *
+	 * @return null|string
+	 */
+	public function getPublicSuffix()
+	{
+		return $this->publicSuffix;
+	}
+
+	/**
+	 * Get Entire host part.
+	 *
+	 * @return null|string
+	 */
+	public function getHost()
+	{
+		return $this->host;
+	}
 }