diff --git a/admin/write-post.php b/admin/write-post.php
index f84f6ca8..306ef1a7 100644
--- a/admin/write-post.php
+++ b/admin/write-post.php
@@ -86,7 +86,7 @@ Typecho_Widget::widget('Widget_Contents_Post_Edit')->to($post);
                             <ul>
                                 <?php
                                 if ($post->have()) {
-                                    $categories = Typecho_Common::arrayFlatten($post->categories, 'mid');
+                                    $categories = array_column($post->categories, 'mid');
                                 } else {
                                     $categories = array();
                                 }
diff --git a/var/Typecho/Common.php b/var/Typecho/Common.php
index c38f5827..bd454f57 100644
--- a/var/Typecho/Common.php
+++ b/var/Typecho/Common.php
@@ -436,39 +436,15 @@ EOF;
     }
 
     /**
-     * 抽取多维数组的某个元素,组成一个新数组,使这个数组变成一个扁平数组
-     * 使用方法:
-     * <code>
-     * <?php
-     * $fruit = array(array('apple' => 2, 'banana' => 3), array('apple' => 10, 'banana' => 12));
-     * $banana = Typecho_Common::arrayFlatten($fruit, 'banana');
-     * print_r($banana);
-     * //outputs: array(0 => 3, 1 => 12);
-     * ?>
-     * </code>
-     *
-     * @access public
-     *
-     * @param array $value 被处理的数组
-     * @param string $key 需要抽取的键值
+     * @param array $value
+     * @param $key
+     * @deprecated use array_column instead
      *
      * @return array
      */
-    public static function arrayFlatten(array $value, $key)
+    public static function arrayFlatten(array $value, $key): array
     {
-        $result = [];
-
-        if ($value) {
-            foreach ($value as $inval) {
-                if (is_array($inval) && isset($inval[$key])) {
-                    $result[] = $inval[$key];
-                } else {
-                    break;
-                }
-            }
-        }
-
-        return $result;
+        return array_column($value, $key);
     }
 
     /**
diff --git a/var/Widget/Abstract/Contents.php b/var/Widget/Abstract/Contents.php
index 46ed6ac7..295041e4 100644
--- a/var/Widget/Abstract/Contents.php
+++ b/var/Widget/Abstract/Contents.php
@@ -218,7 +218,7 @@ class Widget_Abstract_Contents extends Widget_Abstract
      */
     public function applyFields(array $fields, $cid)
     {
-        $exists = array_flip(Typecho_Common::arrayFlatten($this->db->fetchAll($this->db->select('name')
+        $exists = array_flip(array_column($this->db->fetchAll($this->db->select('name')
             ->from('table.fields')->where('cid = ?', $cid)), 'name'));
 
         foreach ($fields as $name => $value) {
diff --git a/var/Widget/Abstract/Metas.php b/var/Widget/Abstract/Metas.php
index 41beca7c..212d6422 100644
--- a/var/Widget/Abstract/Metas.php
+++ b/var/Widget/Abstract/Metas.php
@@ -132,13 +132,13 @@ class Widget_Abstract_Metas extends Widget_Abstract
      */
     public function merge($mid, $type, array $metas)
     {
-        $contents = Typecho_Common::arrayFlatten($this->db->fetchAll($this->select('cid')
+        $contents = array_column($this->db->fetchAll($this->select('cid')
             ->from('table.relationships')
             ->where('mid = ?', $mid)), 'cid');
 
         foreach ($metas as $meta) {
             if ($mid != $meta) {
-                $existsContents = Typecho_Common::arrayFlatten($this->db->fetchAll($this->db
+                $existsContents = array_column($this->db->fetchAll($this->db
                     ->select('cid')->from('table.relationships')
                     ->where('mid = ?', $meta)), 'cid');
 
@@ -250,7 +250,7 @@ class Widget_Abstract_Metas extends Widget_Abstract
     public function clearTags()
     {
         // 取出count为0的标签
-        $tags = Typecho_Common::arrayFlatten($this->db->fetchAll($this->db->select('mid')
+        $tags = array_column($this->db->fetchAll($this->db->select('mid')
             ->from('table.metas')->where('type = ? AND count = ?', 'tags', 0)), 'mid');
 
         foreach ($tags as $tag) {
diff --git a/var/Widget/Archive.php b/var/Widget/Archive.php
index 3bdc750d..4185b4f9 100644
--- a/var/Widget/Archive.php
+++ b/var/Widget/Archive.php
@@ -1748,7 +1748,7 @@ class Widget_Archive extends Widget_Abstract_Contents
             $this->_archiveTitle = $this->title;
 
             /** 设置关键词 */
-            $this->_keywords = implode(',', Typecho_Common::arrayFlatten($this->tags, 'name'));
+            $this->_keywords = implode(',', array_column($this->tags, 'name'));
 
             /** 设置描述 */
             $this->_description = $this->description;
diff --git a/var/Widget/Contents/Attachment/Edit.php b/var/Widget/Contents/Attachment/Edit.php
index cd874729..ef614c05 100644
--- a/var/Widget/Contents/Attachment/Edit.php
+++ b/var/Widget/Contents/Attachment/Edit.php
@@ -269,7 +269,7 @@ class Widget_Contents_Attachment_Edit extends Widget_Contents_Post_Edit implemen
         $deleteCount = 0;
 
         do {
-            $posts = Typecho_Common::arrayFlatten($this->db->fetchAll($this->select('cid')
+            $posts = array_column($this->db->fetchAll($this->select('cid')
                 ->from('table.contents')
                 ->where('type = ? AND parent = ?', 'attachment', 0)
                 ->page($page, 100)), 'cid');
diff --git a/var/Widget/Contents/Post/Edit.php b/var/Widget/Contents/Post/Edit.php
index eab7f243..867e730f 100644
--- a/var/Widget/Contents/Post/Edit.php
+++ b/var/Widget/Contents/Post/Edit.php
@@ -473,7 +473,7 @@ class Widget_Contents_Post_Edit extends Widget_Abstract_Contents implements Widg
         $categories = array_unique(array_map('trim', $categories));
 
         /** 取出已有category */
-        $existCategories = Typecho_Common::arrayFlatten($this->db->fetchAll(
+        $existCategories = array_column($this->db->fetchAll(
             $this->db->select('table.metas.mid')
                 ->from('table.metas')
                 ->join('table.relationships', 'table.relationships.mid = table.metas.mid')
@@ -538,7 +538,7 @@ class Widget_Contents_Post_Edit extends Widget_Abstract_Contents implements Widg
         $tags = array_filter($tags, ['Typecho_Validate', 'xssCheck']);
 
         /** 取出已有tag */
-        $existTags = Typecho_Common::arrayFlatten($this->db->fetchAll(
+        $existTags = array_column($this->db->fetchAll(
             $this->db->select('table.metas.mid')
                 ->from('table.metas')
                 ->join('table.relationships', 'table.relationships.mid = table.metas.mid')
diff --git a/var/Widget/Contents/Related.php b/var/Widget/Contents/Related.php
index 1f21f950..24c78d87 100644
--- a/var/Widget/Contents/Related.php
+++ b/var/Widget/Contents/Related.php
@@ -32,7 +32,7 @@ class Widget_Contents_Related extends Widget_Abstract_Contents
         $this->parameter->setDefault('limit=5');
 
         if ($this->parameter->tags) {
-            $tagsGroup = implode(',', Typecho_Common::arrayFlatten($this->parameter->tags, 'mid'));
+            $tagsGroup = implode(',', array_column($this->parameter->tags, 'mid'));
             $this->db->fetchAll($this->select()
                 ->join('table.relationships', 'table.contents.cid = table.relationships.cid')
                 ->where('table.relationships.mid IN (' . $tagsGroup . ')')
diff --git a/var/Widget/Metas/Category/Admin.php b/var/Widget/Metas/Category/Admin.php
index 367617db..170e133f 100644
--- a/var/Widget/Metas/Category/Admin.php
+++ b/var/Widget/Metas/Category/Admin.php
@@ -22,7 +22,7 @@ class Widget_Metas_Category_Admin extends Widget_Metas_Category_List
         $select = $this->db->select('mid')->from('table.metas')->where('type = ?', 'category');
         $select->where('parent = ?', $this->request->parent ? $this->request->parent : 0);
 
-        $this->stack = $this->getCategories(Typecho_Common::arrayFlatten(
+        $this->stack = $this->getCategories(array_column(
             $this->db->fetchAll($select->order('table.metas.order', Typecho_Db::SORT_ASC)), 'mid'));
     }
 
diff --git a/var/Widget/XmlRpc.php b/var/Widget/XmlRpc.php
index 90cf8407..a1359969 100644
--- a/var/Widget/XmlRpc.php
+++ b/var/Widget/XmlRpc.php
@@ -1513,8 +1513,8 @@ class Widget_XmlRpc extends Widget_Abstract_Contents implements Widget_Interface
         /** 对文章内容做截取处理，以获得description和text_more*/
         [$excerpt, $more] = $this->getPostExtended($post);
         /** 只需要分类的name*/
-        $categories = Typecho_Common::arrayFlatten($post->categories, 'name');
-        $tags = Typecho_Common::arrayFlatten($post->tags, 'name');
+        $categories = array_column($post->categories, 'name');
+        $tags = array_column($post->tags, 'name');
 
         $postStruct = [
             'dateCreated' => new IXR_Date($this->options->timezone + $post->created),
@@ -1570,8 +1570,8 @@ class Widget_XmlRpc extends Widget_Abstract_Contents implements Widget_Interface
 
             /** 只需要分类的name*/
             /** 可以用flatten函数处理 */
-            $categories = Typecho_Common::arrayFlatten($posts->categories, 'name');
-            $tags = Typecho_Common::arrayFlatten($posts->tags, 'name');
+            $categories = array_column($posts->categories, 'name');
+            $tags = array_column($posts->tags, 'name');
 
             $postStructs[] = [
                 'dateCreated' => new IXR_Date($this->options->timezone + $posts->created),
@@ -1804,7 +1804,7 @@ class Widget_XmlRpc extends Widget_Abstract_Contents implements Widget_Interface
             return new IXR_Error($e->getCode(), $e->getMessage());
         }
 
-        $post->setCategories($postId, Typecho_Common::arrayFlatten($categories, 'categoryId'),
+        $post->setCategories($postId, array_column($categories, 'categoryId'),
             'publish' == $post->status);
         return true;
     }
@@ -1916,7 +1916,7 @@ class Widget_XmlRpc extends Widget_Abstract_Contents implements Widget_Interface
             return new IXR_Error($e->getCode(), $e->getMessage());
         }
 
-        $categories = Typecho_Common::arrayFlatten($post->categories, 'name');
+        $categories = array_column($post->categories, 'name');
 
         $content = '<title>' . $post->title . '</title>';
         $content .= '<category>' . implode(',', $categories) . '</category>';
@@ -1973,7 +1973,7 @@ class Widget_XmlRpc extends Widget_Abstract_Contents implements Widget_Interface
 
         $postStructs = [];
         while ($posts->next()) {
-            $categories = Typecho_Common::arrayFlatten($posts->categories, 'name');
+            $categories = array_column($posts->categories, 'name');
 
             $content = '<title>' . $posts->title . '</title>';
             $content .= '<category>' . implode(',', $categories) . '</category>';