🚨 Clean code for linters

composer.json

@@ -18,6 +18,7 @@
     "phpunit/phpunit": "^9"
   },
   "require": {
+    "php": ">=8.0",
     "ext-dom": "*",
     "ext-libxml": "*"
   }

src/Builder/SRSSBuilder.php

@@ -6,14 +6,19 @@ use DOMDocument;
 use DOMElement;
 use Shikiryu\SRSS\Entity\Channel;
 use Shikiryu\SRSS\Entity\Item;
+use Shikiryu\SRSS\Exception\DOMBuilderException;
 use Shikiryu\SRSS\SRSS;
-use Shikiryu\SRSS\SRSSTools;
 
 class SRSSBuilder extends DomDocument
 {
-    private function buildRSS(SRSS $srss)
+    /**
+     * @throws \Shikiryu\SRSS\Exception\DOMBuilderException
+     */
+    private function buildRSS(SRSS $srss): SRSSBuilder
     {
+        try {
             $root = $this->createElement('rss');
+
             $root->setAttribute('version', '2.0');
             $channel = $this->createElement('channel');
 
@@ -30,141 +35,50 @@ class SRSSBuilder extends DomDocument
             $this->preserveWhiteSpace = false;
             // $docs = 'http://www.scriptol.fr/rss/RSS-2.0.html';
 
+        } catch (\DOMException $e) {
+            throw new DOMBuilderException($e);
+        }
+
         return $this;
     }
-    public function build(SRSS $srss, string $filepath)
-    {
-        $this->buildRSS($srss);
 
-        $this->save($filepath);
+    /**
+     * @throws \Shikiryu\SRSS\Exception\DOMBuilderException
+     */
+    public function build(SRSS $srss, string $filepath): void
+    {
+        $this
+            ->buildRSS($srss)
+            ->save($filepath);
     }
 
     /**
      * @return false|string
+     * @throws \Shikiryu\SRSS\Exception\DOMBuilderException
      */
-    public function show(SRSS $srss)
+    public function show(SRSS $srss): bool|string
     {
-        $this->buildRSS($srss);
+        return $this
-
+            ->buildRSS($srss)
-        return $this->saveXml();
+            ->saveXml();
     }
 
-    /**
+    private function appendChannelToDom(Channel $channel, DOMElement $node): void
-     * setter of "image"'s channel attributes
-     * @param $url string  picture's url
-     * @param $title string picture's title
-     * @param $link string link on the picture
-     * @param $width int width
-     * @param $height int height
-     * @param $description string description
-     * TODO
-     */
-    public function setImage($url, $title, $link, $width = 0, $height = 0, $description = '')
     {
-        $channel = $this->_getChannel();
+        foreach (array_filter($channel->toArray(), static fn($el) => !empty($el)) as $name => $value) {
-        $array = [];
-        $url = SRSSTools::checkLink($url);
-        $array['url'] = $url;
-        $title = SRSSTools::noHTML($title);
-        $array['title'] = $title;
-        $link = SRSSTools::checkLink($link);
-        $array['link'] = $link;
-        if($width != 0)
-        {
-            $width = SRSSTools::checkInt($width);
-            $array['width'] = $width;
-        }
-        if($height != 0)
-        {
-            $height = SRSSTools::checkInt($height);
-            $array['height'] = $height;
-        }
-        if($description != 0)
-        {
-            $description = SRSSTools::noHTML($description);
-            $array['description'] = $description;
-        }
-        if($this->image == null)
-        {
-            $node = $this->createElement('image');
-            $urlNode = $this->createElement('url', $url);
-            $titleNode = $this->createElement('title', $title);
-            $linkNode = $this->createElement('link', $link);
-            $node->appendChild($urlNode);
-            $node->appendChild($titleNode);
-            $node->appendChild($linkNode);
-            if($width != 0)
-            {
-                $widthNode = $this->createElement('width', $width);
-                $node->appendChild($widthNode);
-            }
-            if($height != 0)
-            {
-                $heightNode = $this->createElement('height', $height);
-                $node->appendChild($heightNode);
-            }
-            if($description != '')
-            {
-                $descNode = $this->createElement('description', $description);
-                $node->appendChild($descNode);
-            }
-            $channel->appendChild($node);
-        }
-        $this->attr['image'] = $array;
-    }
-
-    /**
-     * setter of "cloud"'s channel attributes
-     * @param $domain string domain
-     * @param $port int port
-     * @param $path string path
-     * @param $registerProcedure string register procedure
-     * @param $protocol string protocol
-     * TODO
-     */
-    public function setCloud($domain, $port, $path, $registerProcedure, $protocol)
-    {
-        $channel = $this->_getChannel();
-        $array = array();
-        $domain = SRSSTools::noHTML($domain);
-        $array['domain'] = $domain;
-        $port = SRSSTools::checkInt($port);
-        $array['port'] = $port;
-        $path = SRSSTools::noHTML($path);
-        $array['path'] = $path;
-        $registerProcedure = SRSSTools::noHTML($registerProcedure);
-        $array['registerProcedure'] = $registerProcedure;
-        $protocol = SRSSTools::noHTML($protocol);
-        $array['protocol'] = $protocol;
-        if($this->cloud == null)
-        {
-            $node = $this->createElement('cloud');
-            $node->setAttribute('domain', $domain);
-            $node->setAttribute('port', $port);
-            $node->setAttribute('path', $path);
-            $node->setAttribute('registerProcedure', $registerProcedure);
-            $node->setAttribute('protocol', $protocol);
-            $channel->appendChild($node);
-        }
-        $this->attr['cloud'] = $array;
-    }
-
-    private function appendChannelToDom(Channel $channel, DOMElement $node)
-    {
-        foreach (array_filter($channel->toArray(), fn($el) => !empty($el)) as $name => $value) {
             $new_node = $this->createElement($name, $value);
             $node->appendChild($new_node);
         }
     }
 
-    private function appendItemsToDom(array $items, DOMElement $channel)
+    private function appendItemsToDom(array $items, DOMElement $channel): void
     {
         foreach ($items as $item) {
             $this->appendItemToDom($item, $channel);
         }
     }
 
-    private function appendItemToDom(Item $item, DOMElement $channel)
+    private function appendItemToDom(Item $item, DOMElement $channel): void
     {
         $itemNode = $this->createElement('item');
         foreach (array_filter($item->toArray()) as $name => $value) {

src/Entity/Channel/Category.php

@@ -2,6 +2,7 @@
 
 namespace Shikiryu\SRSS\Entity\Channel;
 
+use ReflectionException;
 use Shikiryu\SRSS\Entity\SRSSElement;
 use Shikiryu\SRSS\Validator\HasValidator;
 use Shikiryu\SRSS\Validator\Validator;
@@ -21,7 +22,7 @@ class Category extends HasValidator implements SRSSElement
     {
         try {
             return (new Validator())->isObjectValid($this);
-        } catch (\ReflectionException $e) {
+        } catch (ReflectionException) {
             return false;
         }
     }

src/Entity/Channel/Cloud.php

@@ -2,6 +2,7 @@
 
 namespace Shikiryu\SRSS\Entity\Channel;
 
+use ReflectionException;
 use Shikiryu\SRSS\Entity\SRSSElement;
 use Shikiryu\SRSS\Validator\HasValidator;
 use Shikiryu\SRSS\Validator\Validator;
@@ -29,13 +30,11 @@ class Cloud extends HasValidator implements SRSSElement
      */
     public ?string $protocol = null;
 
- //<cloud domain="rpc.sys.com" port="80" path="/RPC2" registerProcedure="myCloud.rssPleaseNotify" protocol="xml-rpc" />
-
     public function isValid(): bool
     {
         try {
             return (new Validator())->isObjectValid($this);
-        } catch (\ReflectionException $e) {
+        } catch (ReflectionException) {
             return false;
         }
     }

src/Entity/Channel/Image.php

@@ -2,6 +2,7 @@
 
 namespace Shikiryu\SRSS\Entity\Channel;
 
+use ReflectionException;
 use Shikiryu\SRSS\Entity\SRSSElement;
 use Shikiryu\SRSS\Validator\HasValidator;
 use Shikiryu\SRSS\Validator\Validator;
@@ -40,7 +41,7 @@ class Image extends HasValidator implements SRSSElement
     {
         try {
             return (new Validator())->isObjectValid($this);
-        } catch (\ReflectionException $e) {
+        } catch (ReflectionException) {
             return false;
         }
     }

src/Entity/Item.php

@@ -2,6 +2,7 @@
 
 namespace Shikiryu\SRSS\Entity;
 
+use ReflectionException;
 use Shikiryu\SRSS\Entity\Item\Category;
 use Shikiryu\SRSS\Entity\Item\Enclosure;
 use Shikiryu\SRSS\Entity\Item\Source;
@@ -64,7 +65,7 @@ class Item extends HasValidator implements SRSSElement
     {
         try {
             return (new Validator())->isObjectValid($this);
-        } catch (\ReflectionException $e) {
+        } catch (ReflectionException) {
             return false;
         }
     }

src/Entity/Item/Category.php

@@ -2,6 +2,7 @@
 
 namespace Shikiryu\SRSS\Entity\Item;
 
+use ReflectionException;
 use Shikiryu\SRSS\Entity\SRSSElement;
 use Shikiryu\SRSS\Validator\HasValidator;
 use Shikiryu\SRSS\Validator\Validator;
@@ -21,7 +22,7 @@ class Category extends HasValidator implements SRSSElement
     {
         try {
             return (new Validator())->isObjectValid($this);
-        } catch (\ReflectionException $e) {
+        } catch (ReflectionException) {
             return false;
         }
     }

src/Entity/Item/Enclosure.php

@@ -2,6 +2,7 @@
 
 namespace Shikiryu\SRSS\Entity\Item;
 
+use ReflectionException;
 use Shikiryu\SRSS\Entity\SRSSElement;
 use Shikiryu\SRSS\Validator\HasValidator;
 use Shikiryu\SRSS\Validator\Validator;
@@ -27,7 +28,7 @@ class Enclosure extends HasValidator implements SRSSElement
     {
         try {
             return (new Validator())->isObjectValid($this);
-        } catch (\ReflectionException $e) {
+        } catch (ReflectionException) {
             return false;
         }
     }

src/Entity/Item/Source.php

@@ -2,6 +2,7 @@
 
 namespace Shikiryu\SRSS\Entity\Item;
 
+use ReflectionException;
 use Shikiryu\SRSS\Entity\SRSSElement;
 use Shikiryu\SRSS\Validator\HasValidator;
 use Shikiryu\SRSS\Validator\Validator;
@@ -22,7 +23,7 @@ class Source extends HasValidator implements SRSSElement
     {
         try {
             return (new Validator())->isObjectValid($this);
-        } catch (\ReflectionException $e) {
+        } catch (ReflectionException) {
             return false;
         }
     }

src/Entity/Media/Content.php

@@ -2,6 +2,7 @@
 
 namespace Shikiryu\SRSS\Entity\Media;
 
+use ReflectionException;
 use Shikiryu\SRSS\Entity\SRSSElement;
 use Shikiryu\SRSS\Validator\HasValidator;
 use Shikiryu\SRSS\Validator\Validator;
@@ -69,7 +70,7 @@ class Content extends HasValidator implements SRSSElement
     {
         try {
             return (new Validator())->isObjectValid($this);
-        } catch (\ReflectionException $e) {
+        } catch (ReflectionException) {
             return false;
         }
     }

src/Exception/DOMBuilderException.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace Shikiryu\SRSS\Exception;
+
+class DOMBuilderException extends SRSSException
+{
+    public function __construct(\DOMException $e)
+    {
+        parent::__construct(sprintf('Error while building DOM (%s)', $e->getMessage()));
+    }
+
+}

src/Exception/SRSSException.php

@@ -11,7 +11,10 @@ class SRSSException extends Exception
         parent :: __construct($msg);
     }
 
-    public function getError()
+    /**
+     * @return string
+     */
+    public function getError(): string
     {
         return 'Une exception a été générée : <strong>Message : ' . $this->getMessage() . '</strong> à la ligne : ' . $this->getLine();
     }

src/Parser/ItemParser.php

@@ -95,33 +95,6 @@ class ItemParser extends DomDocument
         return $this->getElementsByTagName('item')->item(0);
     }
 
-    /**
-     * setter for enclosure's properties
-     *
-     * @param $url    string url
-     * @param $length int length
-     * @param $type   string type
-     * @throws DOMException
-     */
-    public function setEnclosure(string $url, int $length, string $type): void
-    {
-        $array = [];
-        $url = SRSSTools::checkLink($url);
-        $array['url'] = $url;
-        $length = SRSSTools::checkInt($length);
-        $array['length'] = $length;
-        $type = SRSSTools::noHTML($type);
-        $array['type'] = $type;
-        if ($this->enclosure == null) {
-            $node = $this->createElement('enclosure');
-            $node->setAttribute('url', $url);
-            $node->setAttribute('length', $length);
-            $node->setAttribute('type', $type);
-            $this->node->appendChild($node);
-        }
-        $this->attr['enclosure'] = $array;
-    }
-
     /**
      * check if current item is valid (following specifications)
      * @return bool
@@ -156,12 +129,13 @@ class ItemParser extends DomDocument
         }
 
         $flag = $this->possibilities[$name];
-        if ($flag !== '')
+        if ($flag !== '') {
             $val = SRSSTools::check($val, $flag);
+        }
         if (!empty($val)) {
             if ($val instanceof DOMElement) {
                 $this->node->appendChild($val);
-            } elseif ($this->$name == null) {
+            } elseif ($this->$name === null) {
                 $this->node->appendChild(new DomElement($name, $val));
             }
             $this->attr[$name] = $val;
@@ -178,11 +152,17 @@ class ItemParser extends DomDocument
      */
     public function __get($name)
     {
-        if (isset($this->attr[$name]))
+        if (isset($this->attr[$name])) {
             return $this->attr[$name];
+        }
+
         if (array_key_exists($name, $this->possibilities)) {
+
             $tmp = $this->node->getElementsByTagName($name);
-            if ($tmp->length != 1) return null;
+
+            if ($tmp->length !== 1) {
+                return null;
+            }
 
             return $tmp->item(0)->nodeValue;
         }
@@ -194,7 +174,7 @@ class ItemParser extends DomDocument
      * transform current item's object into an array
      * @return array
      */
-    public function toArray()
+    public function toArray(): array
     {
         $infos = [];
         foreach ($this->attr as $attrName => $attrVal) {

src/Parser/SRSSParser.php

@@ -5,10 +5,8 @@ namespace Shikiryu\SRSS\Parser;
 use DOMDocument;
 use DOMNode;
 use DOMNodeList;
-use DOMXPath;
 use Shikiryu\SRSS\Entity\Channel;
 use Shikiryu\SRSS\Entity\Channel\Image;
-use Shikiryu\SRSS\Entity\Item;
 use Shikiryu\SRSS\Exception\ChannelNotFoundInRSSException;
 use Shikiryu\SRSS\Exception\SRSSException;
 use Shikiryu\SRSS\Exception\UnreadableRSSException;
@@ -17,13 +15,11 @@ use Shikiryu\SRSS\SRSS;
 class SRSSParser extends DomDocument
 {
     private SRSS $doc;
-    private DOMXPath $xpath;
 
     public function __construct()
     {
         libxml_use_internal_errors(true);
         parent::__construct();
-        $this->xpath = new DOMXpath($this);
         $this->doc = new SRSS();
     }
 
@@ -65,10 +61,9 @@ class SRSSParser extends DomDocument
     }
 
     /**
-     * @return Item[]
      * @throws SRSSException
      */
-    private function _parseItems(): array
+    private function _parseItems(): void
     {
         $channel = $this->_getChannel();
         /** @var DOMNodeList $items */
@@ -80,9 +75,8 @@ class SRSSParser extends DomDocument
                 $this->doc->items[$i] = ItemParser::read($items->item($i));
             }
         }
-
-        return $this->doc->items;
     }
+
     /**
      * putting all RSS attributes into the object
      * @throws SRSSException
@@ -132,36 +126,10 @@ class SRSSParser extends DomDocument
     private function _getChannel(): DOMNode
     {
         $channel = $this->getElementsByTagName('channel');
-        if($channel->length != 1) {
+        if($channel->length !== 1) {
             throw new ChannelNotFoundInRSSException('channel node not created, or too many channel nodes');
         }
 
         return $channel->item(0);
     }
-
-    /**
-     * getter of "image"'s channel attributes
-     * @return string|array
-     * TODO
-     */
-    public function image()
-    {
-        $args = func_get_args();
-        if (func_num_args() == 0) {
-            $args[0] = 'url';
-        }
-        $img = $this->xpath->query('//channel/image');
-        if ($img->length != 1) { // <image> is not in channel
-            return null;
-        }
-        $img = $img->item(0);
-        $r = [];
-        foreach ($img->childNodes as $child) {
-            if ($child->nodeType == XML_ELEMENT_NODE && in_array($child->nodeName, $args)) {
-                $r[$child->nodeName] = $child->nodeValue;
-            }
-        }
-
-        return (func_num_args() > 1) ? $r : $r[$args[0]];
-    }
 }

src/SRSS.php

@@ -6,6 +6,9 @@ use Iterator;
 use ReflectionException;
 use Shikiryu\SRSS\Builder\SRSSBuilder;
 use Shikiryu\SRSS\Entity\Channel;
+use Shikiryu\SRSS\Entity\Channel\Category;
+use Shikiryu\SRSS\Entity\Channel\Cloud;
+use Shikiryu\SRSS\Entity\Channel\Image;
 use Shikiryu\SRSS\Entity\Item;
 use Shikiryu\SRSS\Exception\ChannelNotFoundInRSSException;
 use Shikiryu\SRSS\Exception\PropertyNotFoundException;
@@ -13,6 +16,27 @@ use Shikiryu\SRSS\Exception\SRSSException;
 use Shikiryu\SRSS\Exception\UnreadableRSSException;
 use Shikiryu\SRSS\Parser\SRSSParser;
 
+/**
+ * @property null|string $title
+ * @property null|string $link
+ * @property null|string $description
+ * @property null|string $language
+ * @property null|string $copyright
+ * @property null|string $managingEditor
+ * @property null|string $webMaster
+ * @property null|string $pubDate
+ * @property null|string $lastBuildDate
+ * @property null|Category[] $category
+ * @property null|string $generator
+ * @property null|string $docs
+ * @property null|Cloud $cloud
+ * @property null|string $ttl
+ * @property null|Image $image
+ * @property null|string $rating
+ * @property null|string $textInput
+ * @property null|string $skipHours
+ * @property null|string $skipDays
+ */
 class SRSS implements Iterator
 {
     public Channel $channel;
@@ -72,7 +96,7 @@ class SRSS implements Iterator
             }
 
             return ($valid && $this->channel->isValid());
-        } catch (ReflectionException $e) {
+        } catch (ReflectionException) {
             return false;
         }
     }
@@ -244,6 +268,7 @@ class SRSS implements Iterator
      * @param string $path
      *
      * @return void
+     * @throws \Shikiryu\SRSS\Exception\DOMBuilderException
      */
     public function save(string $path): void
     {
@@ -252,8 +277,9 @@ class SRSS implements Iterator
 
     /**
      * @return false|string
+     * @throws \Shikiryu\SRSS\Exception\DOMBuilderException
      */
-    public function show()
+    public function show(): bool|string
     {
         return (new SRSSBuilder('1.0', 'UTF-8'))->show($this);
     }

src/SRSSTools.php

@@ -28,36 +28,37 @@ class SRSSTools
 
     /**
      * format the RSS to the wanted format
+     *
      * @param $format string wanted format
      * @param $date   string RSS date
+     *
      * @return string date
      */
-    public static function formatDate($format, $date)
+    public static function formatDate(string $format, string $date): string
     {
         return date($format, strtotime($date));
     }
 
     /**
      * format a date for RSS format
+     *
      * @param string $date date to format
      * @param string $format
+     *
      * @return string
      */
-    public static function getRSSDate($date, $format='')
+    public static function getRSSDate(string $date, string $format = ''): string
     {
-        $datepos = 'dDjlNSwzWFmMntLoYyaABgGhHisueIOPTZcrU';
+        $date_position = 'dDjlNSwzWFmMntLoYyaABgGhHisueIOPTZcrU';
-        if($format != '' && preg_match('~^(['.$datepos.']{1})(-|/)(['.$datepos.']{1})(-|/)(['.$datepos.']{1})$~', $format, $match)){
+        if($format !== '' && preg_match('~^(['.$date_position.']{1})([-/])(['.$date_position.']{1})([-/])(['.$date_position.']{1})$~', $format)){
-            $sep = $match[2];
+            $datetime = DateTime::createFromFormat($format, $date);
-            $format = '%'.$match[1].$sep.'%'.$match[3].$sep.'%'.$match[5];
+            if ($datetime === false) {
-            if($dateArray = strptime($date, $format)){
-                $mois = (int)$dateArray['tm_mon'] + 1;
-                $annee = strlen($dateArray['tm_year']) > 2 ? '20'.substr($dateArray['tm_year'], -2) : '19'.$dateArray['tm_year'];
-                $date = $annee.'-'.$mois.'-'.$dateArray['tm_mday'];
-                return date("D, d M Y H:i:s T", strtotime($date));
-            }
                 return '';
             }
 
+            return $datetime->format(DATE_RSS);
+        }
+
         if (strtotime($date) !==false ) {
             return date("D, d M Y H:i:s T", strtotime($date));
         }
@@ -73,41 +74,49 @@ class SRSSTools
 
     /**
      * check if it's an url
+     *
      * @param $check string to check
+     *
      * @return string|boolean the filtered data, or FALSE if the filter fails.
      */
-    public static function checkLink($check)
+    public static function checkLink(string $check): bool|string
     {
         return filter_var($check, FILTER_VALIDATE_URL);
     }
 
     /**
      * make a string XML-compatible
+     *
      * @param $check string to format
+     *
      * @return string formatted string
      * TODO CDATA ?
      */
-    public static function HTML4XML($check)
+    public static function HTML4XML(string $check): string
     {
         return htmlspecialchars($check);
     }
 
     /**
      * delete html tags
+     *
      * @param $check string to format
+     *
      * @return string formatted string
      */
-    public static function noHTML($check)
+    public static function noHTML(string $check): string
     {
         return strip_tags($check);
     }
 
     /**
      * check if it's a day (in RSS terms)
+     *
      * @param $check string to check
+     *
      * @return string the day, or empty string
      */
-    public static function checkDay($check)
+    public static function checkDay(string $check): string
     {
         $possibleDay = ['monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday', 'sunday'];
         return in_array(strtolower($check), $possibleDay) ? $check : '';
@@ -115,20 +124,24 @@ class SRSSTools
 
     /**
      * check if it's an email
+     *
      * @param $check string to check
+     *
      * @return string|boolean the filtered data, or FALSE if the filter fails.
      */
-    public static function checkEmail($check)
+    public static function checkEmail(string $check): bool|string
     {
         return filter_var($check, FILTER_VALIDATE_EMAIL);
     }
 
     /**
      * check if it's an hour (in RSS terms)
+     *
      * @param $check string to check
+     *
      * @return string|boolean the filtered data, or FALSE if the filter fails.
      */
-    public static function checkHour($check)
+    public static function checkHour(string $check): bool|string
     {
         $options = [
             'options' => [
@@ -142,10 +155,12 @@ class SRSSTools
 
     /**
      * check if it's an int
+     *
      * @param $check int to check
+     *
      * @return int|boolean the filtered data, or FALSE if the filter fails.
      */
-    public static function checkInt($check)
+    public static function checkInt(int $check): bool|int
     {
         return filter_var($check, FILTER_VALIDATE_INT);
     }
@@ -155,7 +170,7 @@ class SRSSTools
      *
      * @return mixed
      */
-    private static function checkMediaType($check)
+    public static function checkMediaType($check): mixed
     {
         return $check;
     }
@@ -165,7 +180,7 @@ class SRSSTools
      *
      * @return mixed|null
      */
-    private static function checkMediaMedium($check)
+    public static function checkMediaMedium($check): ?string
     {
         return in_array($check, ['image', 'audio', 'video', 'document', 'executable']) ? $check : null;
     }
@@ -175,7 +190,7 @@ class SRSSTools
      *
      * @return mixed|null
      */
-    private static function checkBool($check)
+    public static function checkBool($check): ?string
     {
         return in_array($check, ['true', 'false']) ? $check : null;
     }
@@ -185,7 +200,7 @@ class SRSSTools
      *
      * @return mixed|null
      */
-    private static function checkMediumExpression($check)
+    public static function checkMediumExpression($check): ?string
     {
         return in_array($check, ['sample', 'full', 'nonstop']) ? $check : null;
     }

src/Validator/Validator.php

@@ -15,9 +15,9 @@ class Validator
     /**
      * @throws ReflectionException
      */
-    public function isPropertyValid($object, $property)
+    public function isPropertyValid($object, $property): bool
     {
-        $properties = array_filter($this->_getClassProperties(get_class($object)), fn($p) => $p->getName() === $property);
+        $properties = array_filter($this->_getClassProperties(get_class($object)), static fn($p) => $p->getName() === $property);
         if (count($properties) !== 1) {
             return false;
         }
@@ -26,7 +26,7 @@ class Validator
         $propertyValue = $object->{$properties->name};
         $propertyAnnotations = $this->_getPropertyAnnotations($properties);
 
-        if (!in_array('required', $propertyAnnotations, true) && empty($propertyValue)) {
+        if (empty($propertyValue) && !in_array('required', $propertyAnnotations, true)) {
             return true;
         }
 
@@ -67,7 +67,7 @@ class Validator
             $propertyValue = $object->{$property['name']};
 //            $propertyAnnotations = $this->_getPropertyAnnotations($property, get_class($object));
 
-            if (!in_array('required', $property['rules'], true) && empty($propertyValue)) {
+            if (empty($propertyValue) && !in_array('required', $property['rules'], true)) {
                 continue;
             }
 
@@ -109,7 +109,7 @@ class Validator
     {
         preg_match_all('#@(.*?)\n#s', $property->getDocComment(), $annotations);
 
-        return array_map(fn($annotation) => trim($annotation), $annotations[1]);
+        return array_map(static fn($annotation) => trim($annotation), $annotations[1]);
     }
 
     private function _validateString($value): bool
@@ -199,7 +199,7 @@ class Validator
         );
     }
 
-    private function _validateContentMedia($value)
+    private function _validateContentMedia($value): bool
     {
         if (is_array($value)) {
             foreach ($value as $content) {

tests/BasicBuilderTest.php

@@ -16,7 +16,7 @@ class BasicBuilderTest extends TestCase
             unlink($this->saved);
         }
     }
-    public function testCreateBasicRSS()
+    public function testCreateBasicRSS(): void
     {
         $srss = SRSS::create();
         $srss->title = 'My Blog';

tests/BasicReaderTest.php

@@ -9,7 +9,7 @@ use Shikiryu\SRSS\SRSS;
 
 class BasicReaderTest extends TestCase
 {
-    public function testReadBasicRSS()
+    public function testReadBasicRSS(): void
     {
         $rss = SRSS::read(__DIR__.'/resources/basic.xml');
         self::assertEquals('test Home Page', $rss->title);
@@ -20,7 +20,7 @@ class BasicReaderTest extends TestCase
         self::assertTrue($rss->isValid());
     }
 
-    public function testSpecificationExampleRSS()
+    public function testSpecificationExampleRSS(): void
     {
         $rss = SRSS::read(__DIR__.'/resources/harvard.xml');
         self::assertEquals('Liftoff News', $rss->title);
@@ -41,7 +41,7 @@ class BasicReaderTest extends TestCase
         self::assertTrue($rss->isValid());
     }
 
-    public function testChannelImage()
+    public function testChannelImage(): void
     {
         $rss = SRSS::read(__DIR__.'/resources/media/cnn.xml');
         $image = $rss->image;
@@ -51,7 +51,7 @@ class BasicReaderTest extends TestCase
         self::assertEquals('https://www.cnn.com/entertainment/index.html', $image->link, var_export($image, true));
     }
 
-    public function testChannelCategory()
+    public function testChannelCategory(): void
     {
         $rss = SRSS::read(__DIR__.'/resources/cloud.xml');
         $categories = $rss->category;
@@ -62,7 +62,7 @@ class BasicReaderTest extends TestCase
         self::assertEquals('rssUpdates', $category->value, var_export($category, true));
     }
 
-    public function testCloud()
+    public function testCloud(): void
     {
         $rss = SRSS::read(__DIR__.'/resources/cloud.xml');
         $cloud = $rss->cloud;
@@ -74,7 +74,7 @@ class BasicReaderTest extends TestCase
         self::assertEquals('xml-rpc', $cloud->protocol, var_export($cloud, true));
     }
 
-    public function testSource()
+    public function testSource(): void
     {
         $rss = SRSS::read(__DIR__.'/resources/basic.xml');
         $firstItem = $rss->getFirst();
@@ -85,7 +85,7 @@ class BasicReaderTest extends TestCase
         self::assertEquals('Tomalak\'s Realm', $source->value);
     }
 
-    public function testEnclosure()
+    public function testEnclosure(): void
     {
         $rss = SRSS::read(__DIR__.'/resources/basic.xml');
         $item = $rss->getItem(2);

tests/ExceptionTest.php

@@ -8,22 +8,22 @@ use Shikiryu\SRSS\SRSS;
 
 class ExceptionTest extends TestCase
 {
-    public function testPropertyNotFound()
+    public function testPropertyNotFound(): void
     {
         $srss = new SRSS();
         $this->expectException(PropertyNotFoundException::class);
         $srss->notfound = 'true';
     }
 
-    public function testRssNotFound()
+    public function testRssNotFound(): void
     {
         $this->expectException(UnreadableRSSException::class);
-        $rss = SRSS::read('not_found.xml');
+        SRSS::read('not_found.xml');
     }
 
-    public function testMissingChannel()
+    public function testMissingChannel(): void
     {
         $this->expectException(ChannelNotFoundInRSSException::class);
-        $rss = SRSS::read(__DIR__ . '/resources/invalid-no-channel.xml');
+        SRSS::read(__DIR__ . '/resources/invalid-no-channel.xml');
     }
 }

tests/MediaTest.php

@@ -5,7 +5,7 @@ use Shikiryu\SRSS\SRSS;
 
 class MediaTest extends TestCase
 {
-    public function testImages()
+    public function testImages(): void
     {
         $rss = SRSS::read(__DIR__.'/resources/media/cnn.xml');
         self::assertEquals('CNN.com - RSS Channel - Entertainment', $rss->title);
@@ -17,7 +17,7 @@ class MediaTest extends TestCase
         self::assertTrue($rss->isValid(), var_export($rss->channel->validated, true));
     }
 
-    public function testMusicVideo()
+    public function testMusicVideo(): void
     {
         $rss = SRSS::read(__DIR__.'/resources/media/music-video.xml');
         self::assertEquals('Music Videos 101', $rss->title);

tests/OriginalReaderSRSSTest.php

@@ -16,7 +16,7 @@ class OriginalReaderSRSSTest extends TestCase
         }
     }
 
-    public function testOriginalReader()
+    public function testOriginalReader(): void
     {
         $rss = SRSS::read($this->original);
         self::assertEquals('Liftoff News', $rss->title);

tests/OriginalWriterSRSSTest.php

@@ -7,7 +7,7 @@ use Shikiryu\SRSS\SRSSTools;
 
 class OriginalWriterSRSSTest extends TestCase
 {
-    public function testOriginalWriter()
+    public function testOriginalWriter(): void
     {
         $rss = SRSS::create();
         $rss->title = 'My Awesome Blog';
@@ -22,12 +22,12 @@ class OriginalWriterSRSSTest extends TestCase
         ];
 
         foreach($items as $item){
-            $rssitem = new Item();
+            $rss_item = new Item();
-            $rssitem->title = $item["title"];
+            $rss_item->title = $item["title"];
-            $rssitem->link = $item['link'];
+            $rss_item->link = $item['link'];
-            $rssitem->pubDate = $item["pubDate"];
+            $rss_item->pubDate = $item["pubDate"];
-            $rssitem->description =  $item["description"];
+            $rss_item->description =  $item["description"];
-            $rss->addItem($rssitem);
+            $rss->addItem($rss_item);
         }
 
         $firstItem = new Item();