在我的插件中，我有一个对象“Settings”（用于在Wordpress设置中显示内容）。

Settings.php

<?php

namespace FooNamespace\\Admin\\Settings;

class Settings {

    public $menu_slug;

    public function __construct(){

        $this->menu_slug = \'settings-\'.PLUGIN_DOMAIN ;

        // Initialize the component
        $this->init();

    }

    protected function init(){

        // output method
        add_action( \'_output_content_submenu_page_\' . $this->menu_slug, array( $this, \'html_page_template\' ) );
    }

    public function html_page_template(){

        include_once \'views/view-settings.php\';

    }


 }

在“查看设置”中。php”，我通常可以使用所有基本的wordpress函数。

view-settings.php

<div class="wrap">

    <h1 class="wp-heading-inline">
        <?php _e(\'Settings for \'.PLUGIN_TITLE, PLUGIN_DOMAIN); ?>
    </h1>
    <hr wp-header-end />

    <h2 class="nav-tab-wrapper">
        ...
    </h2>

    <?php foreach ($tabs as $tab ){ ?>
            <?php include_once $tab["path"]; ?>
    <?php } ?>

</div>

但在我包含的文件中（include_once $tab["path"]; ), 我不能像这样使用wordpress函数__() 或_e().

Included file

<form id="form-settings-recaptach" method="post">
    <table class="widefat fixed">
        <tbody>
            <tr>
                <td>
                    <label class="label"><?php _e( "Foo", PLUGIN_DOMAIN ); ?></label>
                </td>
            </tr>
        </tbody>
    </table>
</form>

所以我得到了这个错误：

致命错误：未捕获错误：调用未定义的函数\\u e（）

Notice : 如果我将子php文件直接包含在设置中。php，调用函数。因此，Wordpress的iclude和levels中的包含是一个真正的问题

为什么？我如何调试这个？

 plugin_dir_path( __FILE__ ).\'my-child-template.php\' //<-- \\path\\to\\file/my-child-template.php

 //Changed by
 plugin_dir_url( __FILE__ ).\'my-child-template.php\' //<-- http://localhost/wordpress/wp-content/plugins/my-plugin/path/to/file/my-child-template.php

public function html_page_template(){
    ob_start();
    $ipAddress = gethostbyname($_SERVER[\'SERVER_NAME\']);
    if( $ipAddress === "127.0.0.1"){
        $base_path =  dirname( __FILE__ )."\\\\templates\\\\";
    }else{
        $base_path = plugin_dir_path( __FILE__ )."templates/";
    }
    $a_settings_tab = array( 
        0 => array(
            "key" => "foo",
            "path" =>  $base_path ."foo.php"
        ), 
        1 => array(
            "key" => "bar",
            "path" =>  $base_path ."bar.php"
        )
    );

    include_once \'views/view-settings.php\';
    $html = ob_get_clean();
    echo $html;
}

public function init(){
    add_menu_page( \'Your Plugin Name\' , \'Your Plugin Settings\' , \'manage_options\' , \'your_plugin_settings\' ,  array( $this, \'settings_page\' ) );
}
public function html_page_template(){
    ob_start();
    include(\'views/view-settings.php\');
    $html = ob_get_clean();
    echo $html;
}