diff --git a/app/MetadataResolver/PixivResolver.php b/app/MetadataResolver/PixivResolver.php
index ad82f48..c395892 100644
--- a/app/MetadataResolver/PixivResolver.php
+++ b/app/MetadataResolver/PixivResolver.php
@@ -8,32 +8,32 @@ class PixivResolver implements Resolver
     /**
      * サムネイル画像 URL から最大長辺 1200px の画像 URL に変換する
      *
-     * @param string $thumbnail_url サムネイル画像 URL
+     * @param string $thumbnailUrl サムネイル画像 URL
      * @return string 1200px の画像 URL
      */
-    public function thumbnailToMasterUrl(string $thumbnail_url):string
+    public function thumbnailToMasterUrl(string $thumbnailUrl):string
     {
-        $temp = str_replace("/c/128x128", "", $thumbnail_url);
-        $large_url = str_replace("square1200.jpg", "master1200.jpg", $temp);
-        return $large_url;
+        $temp = str_replace("/c/128x128", "", $thumbnailUrl);
+        $largeUrl = str_replace("square1200.jpg", "master1200.jpg", $temp);
+        return $largeUrl;
     }
 
     /**
      * 直リン可能な pixiv.cat のプロキシ URL に変換する
      * HUGE THANKS TO PIXIV.CAT!
      *
-     * @param string $pixiv_url i.pximg URL
+     * @param string $pixivUrl i.pximg URL
      * @return string i.pixiv.cat URL
      */
-    public function proxize(string $pixiv_url):string
+    public function proxize(string $pixivUrl):string
     {
-        return str_replace("i.pximg.net", "i.pixiv.cat", $pixiv_url);
+        return str_replace("i.pximg.net", "i.pixiv.cat", $pixivUrl);
     }
 
     public function resolve(string $url): Metadata
     {
-        preg_match("~illust_id=(\d+)~", parse_url($url)["query"], $illust_id);
-        $illust_id = $illust_id[1];
+        preg_match("~illust_id=(\d+)~", parse_url($url)["query"], $match);
+        $illustId = $match[1];
 
         // 漫画ページかつページ数あり
         if (strpos(parse_url($url)["query"], "mode=manga_big") && strpos(parse_url($url)["query"], "page=")) {
@@ -49,15 +49,15 @@ class PixivResolver implements Resolver
                 $ogpResolver = new OGPResolver();
                 $metadata = $ogpResolver->parse($res->getBody());
 
-                preg_match("~https://i\.pximg\.net/c/128x128/img-master/img/\d{4}/\d{2}/\d{2}/\d{2}/\d{2}/\d{2}/{$illust_id}_p0_square1200\.jpg~", $res->getBody(), $match);
-                $illust_thumbnail_url = $match[0];
+                preg_match("~https://i\.pximg\.net/c/128x128/img-master/img/\d{4}/\d{2}/\d{2}/\d{2}/\d{2}/\d{2}/{$illustId}_p0_square1200\.jpg~", $res->getBody(), $match);
+                $illustThumbnailUrl = $match[0];
 
-                $illust_url = $this->thumbnailToMasterUrl($illust_thumbnail_url);
+                $illustUrl = $this->thumbnailToMasterUrl($illustThumbnailUrl);
 
                 // 指定ページに変換
-                $illust_url = str_replace("p0_master", "p{$page}_master", $illust_url);
+                $illustUrl = str_replace("p0_master", "p{$page}_master", $illustUrl);
 
-                $metadata->image =  $this->proxize($illust_url);
+                $metadata->image =  $this->proxize($illustUrl);
                 ;
 
                 return $metadata;
@@ -76,12 +76,12 @@ class PixivResolver implements Resolver
 
                     // 作品ページの場合のみ対応
                     if (strpos(parse_url($url)["query"], "mode=medium")) {
-                        preg_match("~https://i\.pximg\.net/c/128x128/img-master/img/\d{4}/\d{2}/\d{2}/\d{2}/\d{2}/\d{2}/{$illust_id}(_p0)?_square1200\.jpg~", $res->getBody(), $match);
-                        $illust_thumbnail_url = $match[0];
+                        preg_match("~https://i\.pximg\.net/c/128x128/img-master/img/\d{4}/\d{2}/\d{2}/\d{2}/\d{2}/\d{2}/{$illustId}(_p0)?_square1200\.jpg~", $res->getBody(), $match);
+                        $illustThumbnailUrl = $match[0];
 
-                        $illust_url = $this->thumbnailToMasterUrl($illust_thumbnail_url);
+                        $illustUrl = $this->thumbnailToMasterUrl($illustThumbnailUrl);
 
-                        $metadata->image =  $this->proxize($illust_url);
+                        $metadata->image =  $this->proxize($illustUrl);
                         ;
                     }
                 }