add_action( \'admin_menu\', \'my_sidebar_plugin_menu\' );

function my_sidebar_plugin_menu() {

add_theme_page( \'sidebar Plugin Options\', \'Add Sidebar\', \'manage_options\', \'my-sidebar-unique-identifier\', \'my_sidebar_plugin_options\' );

 $nonce = filter_input(INPUT_POST, \'my_custom_sidebars_nonce\', FILTER_SANITIZE_STRING);
 if ( ! empty($nonce) && wp_verify_nonce($nonce, \'my_custom_sidebars\') ) {
 $sidebars =  (array) $_POST[\'custom_sidebars\'];
 update_option(\'my_theme_sidebars\', $sidebars);
 add_action(\'admin_notices\', \'my_custom_sidebars_notice\');
  }
 }

 function my_sidebar_plugin_options() {

 wp_enqueue_script(\'jquery\');
 wp_enqueue_script(\'custom_sidebar-js\', get_template_directory_uri() . \'/js/custom_sidebar.js\');
 if ( !current_user_can( \'manage_options\' ) )  {
    wp_die( __( \'You do not have sufficient permissions to access this page.\' ) );
  }
 ?>

 <div class="my-form">
    <div class="wrap">
 <h2>Add Custom Sidebars</h2>

 <form id="sidebars" method="post">

 <?php wp_nonce_field(\'my_custom_sidebars\', \'my_custom_sidebars_nonce\');
 $saved = get_option(\'my_theme_sidebars\');
 $xx=get_option(\'my_theme_sidebars\');
 //print_r($xx);
 $no=count($xx);
 ?>

 <div id="append">
 <p class="text-box">
        <label for="box1">Sidebar-<span class="box-number">1</span></label>
        <input type="text" name="custom_sidebars[]" value="<?php echo $xx[0]; ?>" id="box1" />
        <a href="#" class="remove-box">Remove</a>

    </p>

 <?php if($no>1){ 
    for($i=1;$i<$no;$i++){

 ?>     
 <p class="text-box"><label for="box\' + n + \'">Sidebar-<span class="box-number"><?php echo $i+1; ?></span></label> 
 <input type="text" name="custom_sidebars[]" value="<?php echo $xx[$i]; ?>" id="box\' + n + \'" /> 
 <a href="#" class="remove-box">Remove</a>
 </p>
 <?php }

 } ?></div>
 <!--<a class="add-box" href="#">Add More</a>-->
 <button type="button"  class="add-box">Add New Sidebar</button>

 </table>

 <input type="hidden" name="action" value="update" />
 <input type="hidden" name="page_options" value="no_of_sidebar,sidebar_names,boxes" />

 <p class="submit">
<input type="submit" class="button-primary clsSubmit" value="<?php _e(\'Save Changes\') ?>" />
</p>


</form>
</div>
</div>
    <?php
}

function my_custom_sidebars_notice() {
echo \'<div class="updated"><p>Sidebar(s) Updated.</p></div>\';
}

add_action( \'add_meta_boxes\', \'my_custom_sidebar_metabox\' ); 

function my_custom_sidebar_metabox() {
  $screens = array( \'post\', \'page\' ); // add the metabox for pages and post
  foreach ( $screens as $screen ) {
    add_meta_box(\'my_custom_sidebar\', \'Select a Sidebar\',\'my_custom_sidebar_box\', $screen);
  }
}

function my_custom_sidebar_box( $post ) {
  $sidebars = get_option(\'my_theme_sidebars\'); // get all the sidebars names 
  if ( empty($sidebars) ) {
    echo \'No custom sidebars registered.\';
    return;
  }
  wp_nonce_field( \'my_custom_sidebar\', \'my_custom_sidebar_box_nonce\' );
  $value = get_post_meta( $post->ID, \'_custom_sidebar\', true ); // actual value
  echo \'<label>Select a Sidebar</label> \';
  echo \'<select name="custom_sidebar">\';
  // default option
  echo \'<option value=""\' . selected(\'\', $value, false) . \'>Default</option>\';
  // an option for every sidebar
  foreach ($sidebars as $sidebar) {
     if ( empty($sidebar) ) continue;
     $v = sanitize_title($sidebar);
     $n = esc_html($sidebar);
     echo \'<option value="\' . $v . \'"\' . selected($v, $value) .\'>\' .$n .\'</option>\';
  }
  echo \'<select>\';
}

add_action( \'save_post\', \'my_custom_sidebar_metabox_save\' );

function my_custom_sidebar_metabox_save( $post_id ) {
  // If this is an autosave, our form has not been submitted, do nothing.
  if ( defined( \'DOING_AUTOSAVE\' ) && DOING_AUTOSAVE ) return;
  // check nonce
  $nonce = filter_input(INPUT_POST, \'my_custom_sidebar_box_nonce\', FILTER_SANITIZE_STRING);
  if ( empty($nonce) || ! wp_verify_nonce( $nonce, \'my_custom_sidebar\' ) ) return;
  $type = get_post_type($post_id);
  // Check the user\'s permissions.
  $cap = ( \'page\' === $type ) ? \'edit_page\' : \'edit_post\';
  if ( ! current_user_can( $cap, $post_id ) ) return;
  $custom = filter_input(INPUT_POST, \'custom_sidebar\', FILTER_SANITIZE_STRING);
  // Update the meta field in the database.
  if ( empty($custom) ) {
     delete_post_meta( $post_id, \'_custom_sidebar\');
  } else {
    update_post_meta( $post_id, \'_custom_sidebar\', $custom );
  }
}

要显示自定义侧栏，请sidebar.php 应包含以下内容：

// change the following according to your defaults sidebar if exists
$sidebar = \'main_sidebar\'; 
// if in singular post/page check for saved custom sidebar
if ( is_singular() ) {
  $id = get_queried_object_id(); // get current post/page id
  $custom = get_post_meta( $id, \'_custom_sidebar\', true ); // get selected sidebar
  if ( ! empty($custom) ) $sidebar = $custom;
}
if ( is_active_sidebar( $sidebar ) ) {
?>
<ul id="sidebar"><?php dynamic_sidebar( $sidebar ); ?></ul>
<?php } ?>

更新：为多侧栏js/custom\\u侧栏创建新的JavaScript文件。js公司

( function( $ ) {

$(\'.my-form .add-box\').click(function(){

var n = $(\'.text-box\').length + 1;
var box_html = $(\'<p class="text-box"><label for="box\' + n + \'">Sidebar-<span class="box-number">\' + n + \'</span></label> <input type="text" name="custom_sidebars[]" value="" id="box\' + n + \'" /> <a href="#" class="remove-box">Remove</a></p>\');
    box_html.hide();
    $(\'#append\').append(box_html);
    box_html.fadeIn(\'slow\');

    return false;


}); 

$(\'.my-form\').on(\'click\', \'.remove-box\', function(){
$(this).parent().css( \'background-color\', \'#FF6C6C\' );
$(this).parent().fadeOut("slow", function() {
    $(this).remove();
    $(\'.box-number\').each(function(index){
        $(this).text( index + 1 );
    });
});
return false;
});



$(\'.clsSubmit\').click(function(){
var m = $(\'.text-box\').length;
if(m==0){alert("press OK to Reset");}
});