有一个用于返回的内置函数null: __return_null.

所以你可以替换create_function(\'$a\', \'return null;\'); 仅使用\'__return_null\' （注意引号）看起来$a 无论如何都不使用。

也可以直接使用匿名函数作为参数：function($a) {return null;} （无引号）。无论哪种方式，因为参数需要函数calback。

您应该能够更改create\\u函数（“$a”，“return null；”）到Anonymous Function （又名闭包）：

From :

    add_theme_page(
            $this->args[\'page_slug\'],
            __(\'Dev Mode Info\', \'nhp-opts\'), 
            __(\'Dev Mode Info\', \'nhp-opts\'), 
            $this->args[\'page_cap\'], 
            $this->args[\'page_slug\'].\'&tab=dev_mode_default\', 
            create_function( \'$a\', "return null;" )
    );

        add_theme_page(
                $this->args[\'page_slug\'],
                __(\'Dev Mode Info\', \'nhp-opts\'), 
                __(\'Dev Mode Info\', \'nhp-opts\'), 
                $this->args[\'page_cap\'], 
                $this->args[\'page_slug\'].\'&tab=dev_mode_default\', 
                function($a){ return null; }
        );

function _options_page(){
    if($this->args[\'page_type\'] == \'submenu\'){
        if(!isset($this->args[\'page_parent\']) || empty($this->args[\'page_parent\'])){
            $this->args[\'page_parent\'] = \'themes.php\';
        }
        $this->page = add_theme_page(
                        $this->args[\'page_parent\'],
                        $this->args[\'page_title\'], 
                        $this->args[\'menu_title\'], 
                        $this->args[\'page_cap\'], 
                        $this->args[\'page_slug\'], 
                        array(&$this, \'_options_page_html\')
                    );
    }else{
        $this->page = add_theme_page(
                        $this->args[\'page_title\'], 
                        $this->args[\'menu_title\'], 
                        $this->args[\'page_cap\'], 
                        $this->args[\'page_slug\'], 
                        array(&$this, \'_options_page_html\'),
                        $this->args[\'menu_icon\'],
                        $this->args[\'page_position\']
                    );

    if(true === $this->args[\'allow_sub_menu\']){

        //this is needed to remove the top level menu item from showing in the submenu
        add_theme_page(
          $this->args[\'page_slug\'],
          $this->args[\'page_title\'],
          \'\',
          $this->args[\'page_cap\'],
          $this->args[\'page_slug\'],
          function($a){ return null; }
        );


        foreach($this->sections as $k => $section){

            add_theme_page(
                    $this->args[\'page_slug\'],
                    $section[\'title\'], 
                    $section[\'title\'], 
                    $this->args[\'page_cap\'], 
                    $this->args[\'page_slug\'].\'&tab=\'.$k, 
                    function($a){ return null; }
            );

        }

        if(true === $this->args[\'show_import_export\']){

            add_theme_page(
                    $this->args[\'page_slug\'],
                    __(\'Import / Export\', \'nhp-opts\'), 
                    __(\'Import / Export\', \'nhp-opts\'), 
                    $this->args[\'page_cap\'], 
                    $this->args[\'page_slug\'].\'&tab=import_export_default\', 
                    function($a){ return null; }
            );

        }//if

        foreach($this->extra_tabs as $k => $tab){

            add_theme_page(
                    $this->args[\'page_slug\'],
                    $tab[\'title\'], 
                    $tab[\'title\'], 
                    $this->args[\'page_cap\'], 
                    $this->args[\'page_slug\'].\'&tab=\'.$k, 
                    function($a){ return null; }
            );

        }
        if(true === $this->args[\'dev_mode\']){

            add_theme_page(
                    $this->args[\'page_slug\'],
                    __(\'Dev Mode Info\', \'nhp-opts\'), 
                    __(\'Dev Mode Info\', \'nhp-opts\'), 
                    $this->args[\'page_cap\'], 
                    $this->args[\'page_slug\'].\'&tab=dev_mode_default\', 
                    function($a){ return null; }
            );

        }//if
    }//if           


    }//else
    add_action(\'admin_print_styles-\'.$this->page, array(&$this, \'_enqueue\'));
    add_action(\'load-\'.$this->page, array(&$this, \'_load_page\'));
}//function