如果给WordPress 编辑器添加“下一页”分页按钮

/*-----------------------------------------------------------------------------------*/
# 在 WordPress 编辑器添加“下一页”按钮
/*-----------------------------------------------------------------------------------*/
add_filter( 'mce_buttons', 'cmp_add_page_break_button', 1, 2 );
function cmp_add_page_break_button( $buttons, $id ){
    if ( 'content' != $id )
        return $buttons;
    array_splice( $buttons, 13, 0, 'wp_page' );
    return $buttons;
}