插件錯誤 - array_merge（）：參數＃2不是數組

Question

我正在構建我的第一個wordpress插件，錯誤日誌引發了以下錯誤。

[06-Jul-2014 20:07:21 UTC] PHP Warning: array_merge(): Argument #2 is not an array in \wp-content\plugins\test-plugin\screen.php on line 49 

[06-Jul-2014 20:07:21 UTC] PHP Warning: array_merge(): Argument #2 is not an array in \wp-content\plugins\test-plugin\screen.php on line 50 

[06-Jul-2014 20:07:21 UTC] PHP Warning: end() expects parameter 1 to be array, null given in \wp-content\plugins\test-plugin\screen.php on line 323 

[06-Jul-2014 20:07:21 UTC] PHP Warning: Invalid argument supplied for foreach() in \wp-content\plugins\test-plugin\screen.php on line 324 

有關行的誤差49 & 50的代碼是：

function register_settings() { 
    global $menu; 
    global $submenu; 
    $this->menus = array_merge(array(), $menu); 
    $this->submenus = array_merge(array(), $submenu); 
    $this->settings = get_option($this->settings_name); 
    register_setting('admin-theme', $this->settings_name); 
} 

有關行的誤差323 & 324的代碼是：

function admin_menu() { 
    global $menu; 
    global $submenu; 
    // update menu 
    end($menu); 
    foreach ($menu as $k=>&$v){ 
     $id = explode(' <span', $v[0]); 
     $slug = 'menu_'.strtolower(str_replace(' ','_',$id[0])); 
     $slug_hide = $slug.'_hide'; 
     if($id[0] != NULL && $this->get_setting($slug) !== NULL){ 
      $v[0] = $this->get_setting($slug). (isset($id[1]) ? ' <span '.$id[1] : ''); 
     } 
     if($this->get_setting($slug_hide)){ 
      unset($menu[$k]); 
     } 
     // update the submenu 
     if(isset($submenu[$v[2]])){ 
      foreach ($submenu[$v[2]] as $key=>&$val){    
       $id = explode(' <span', $val[0]); 
       $slug_sub = $slug.'_'.strtolower(str_replace(' ','_',$id[0])); 
       $slug_sub_hide = $slug_sub.'_hide'; 
       if($id[0] != NULL && $this->get_setting($slug_sub) !== NULL){ 
        $val[0] = $this->get_setting($slug_sub). (isset($id[1]) ? ' <span '.$id[1] : ''); 
       } 
       if($this->get_setting($slug_sub_hide)){      
        unset($submenu[$v[2]][$key]); 
       } 
      } 
     } 
    } 
} 

我似乎無法弄清楚，所以如果任何人可以幫助或指出我的權利方向它將不勝感激。

Answer 1

首先你需要檢查你的兩個變量是數組

與is_array()像if(is_array($menu))

如果不使用類型轉換爲變量轉換陣列

if(is_array($menu)) 
     $this->menus = array_merge(array(), $menu); 
    else 
     $this->menus = array_merge(array(), (array)$menu); 
    if(is_array($submenu)) 
     $this->submenus = array_merge(array(), $submenu); 
    else 
     $this->submenus = array_merge(array(), (array)$submenu);