wordpress在后台顶部导航添加链内容

function custom_adminbar_menu( $meta = TRUE ) {  
    global $wp_admin_bar;  
        if ( !is_user_logged_in() ) { return; }  
        if ( !is_super_admin() || !is_admin_bar_showing() ) { return; }  
    $wp_admin_bar->add_menu( array(  
        'id' => 'custom_menu',  
        'title' => __( '操作遇到问题？联系我们' ),  
        'href' => 'http://www.qianxiaoduan.com/',  
        'meta'  => array( target => '_blank' ) )  
    );  
}  
add_action( 'admin_bar_menu', 'custom_adminbar_menu', 100 );