istediğiniz sayfaya özel sidebar oluşturma.

custom-sidebar-class.php

<?php

/**
 * Nivoshop Custom Sidebar
 *
 * Özel sidebar metabox değeri true olan sayfaların sidebar'larının oluşturulduğu kod.
 * 
 * @author   Nivo Themes
 * @since    1.0
 * @package  nivoshop
 */

if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly


class CustomSidebars {
	
	public function __construct() {
		add_action( 'widgets_init', array( $this, 'nivoshop_custom_widgets_init' ) );
	}

	public function nivoshop_custom_widgets_init() {
		
		$sidebared_content = get_pages();
		foreach ( $sidebared_content as $sp ) {
			
			$page_id = $sp->ID;
			$page_title = $sp->post_title;
			$page_name = $sp->post_name;
			$_showsidebar = get_post_meta($sp->ID, '_showsidebar', true);
			
			if ( !empty($_showsidebar) && ( $_showsidebar == 'show' ) ) :
			
				$sidebar_args['sidebar-'.$page_id] = array(
					'name'          => $page_title,
					'id'            => 'sidebar-'.$page_id,
					'description'   => $page_title . __(' sayfası bileşen alanı', 'nivoshop'),
				);
				
				$sidebar_args = apply_filters( 'nivoshop_sidebar_args', $sidebar_args );

				foreach ( $sidebar_args as $sidebar => $args ) {
					$widget_tags = array(
						'before_widget' => '<aside id="%1$s" class="widget %2$s">',
						'after_widget'  => '</aside>',
						'before_title'  => '<h3 class="widget-title">',
						'after_title'   => '</h3>',
					);

					/**
					 * Dynamically generated filter hooks. Allow changing widget wrapper and title tags. See the list below.
					 *
					 * 'nivoshop_customsidebar_widget_tags'
					 */
					$filter_hook = sprintf( 'nivoshop_%s_widget_tags', $sidebar );
					$widget_tags = apply_filters( $filter_hook, $widget_tags );

					if ( is_array( $widget_tags ) ) {
						register_sidebar( $args + $widget_tags );
					}
				}
				
			endif;
		}
		
		wp_reset_postdata();
	}	
}
new CustomSidebars;

custom-sidebar-meta.php

<?php

/**
 * Contact Page Meta Box
 *
 * Sayfalarda sidebar oluşturup / oluşturma ve konumunu soracak metabox.
 * 
 * @author   Nivo Themes
 * @since    1.0
 * @package  nivoshop
 */

if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly

class CustomSidebarMeta {

	public function __construct() {

		if ( is_admin() ) {
			add_action( 'load-post.php',     array( $this, 'init_metabox' ) );
			add_action( 'load-post-new.php', array( $this, 'init_metabox' ) );
		}

	}

	public function init_metabox() {

		add_action( 'add_meta_boxes',        array( $this, 'add_metabox' ), 10, 2 );
		add_action( 'save_post',             array( $this, 'save_metabox' ), 10, 2 );

	}

	public function add_metabox() {
		add_meta_box(
			'nivoshop-custom-sidebar',
			__( 'Bileşen Alanı Yönetimi', 'nivoshop' ),
			array( $this, 'nivo_customsidebar_metabox' ),
			array( 'page', 'product' ),
			'side',
			'high'
		);
	}

	public function nivo_customsidebar_metabox( $post ) {

		// Add nonce for security and authentication.
		wp_nonce_field( 'nivoshop_showsidebar_nonce_action', 'nivoshop_showsidebar_nonce' );

		// Retrieve an existing value from the database.
		$_showsidebar = get_post_meta( $post->ID, '_showsidebar', true );
		$_sidebarposition = get_post_meta( $post->ID, '_sidebarposition', true );
		
		// Set default values.
		if( empty( $_showsidebar ) ) $_showsidebar = '';

		// Form fields.
		echo '<table class="form-table">';

		echo '	<tr>';
		echo '		<th style="padding-bottom: 0 !important;"><label for="_showsidebar" class="_showsidebar_label">' . __( 'İçeriğe Özel Bileşen Alanı', 'nivoshop' ) . '</label></th>';
		echo '	</tr>';
		echo '	<tr>';
		echo '		<td style="padding-left:0">';
		echo '			<label><input type="radio" name="_showsidebar" class="_showsidebar_field" value="show" ' . checked( $_showsidebar, 'show', false ) . '> ' . __( 'Etkinleştir', 'nivoshop' );
		echo '			<input type="radio" name="_showsidebar" class="_showsidebar_field" value="hide" ' . checked( $_showsidebar, 'hide', false ) . '> ' . __( 'Etkinleştirme', 'nivoshop' );
		echo '		</td>';
		echo '	</tr>';

		echo '	<tr>';
		echo '		<th style="padding-bottom: 0 !important;"><label for="_sidebarposition" class="_sidebarposition_label">' . __( 'Bileşen Alanı Konumu', 'nivoshop' ) . '</label></th>';
		echo '	</tr>';
		echo '	<tr>';
		echo '		<td style="padding: 0 !important;">';
		echo '			<select name="_sidebarposition">';
		echo '				<option value="default" ' . selected( $_sidebarposition, 'left', false ) . '> ' . __( 'Genel Ayarları Kullan', 'nivoshop' ) . '</option>';
		echo '				<option value="left" ' . selected( $_sidebarposition, 'left', false ) . '> ' . __( 'Bileşen Alanı Solda', 'nivoshop' ) . '</option>';
		echo '				<option value="right" ' . selected( $_sidebarposition, 'right', false ) . '> ' . __( 'Bileşen Alanı Sağda', 'nivoshop' ) . '</option>';
		echo '			</select>';		
		echo '		</td>';
		echo '	</tr>';		

		echo '</table>';

	}

	public function save_metabox( $post_id, $post ) {
		// Add nonce for security and authentication.
		$nonce_name   = isset( $_POST['nivoshop_showsidebar_nonce'] ) ? $_POST['nivoshop_showsidebar_nonce'] : '';
		$nonce_action = 'nivoshop_showsidebar_nonce_action';

		// Check if a nonce is set.
		if ( ! isset( $nonce_name ) )
			return;

		// Check if a nonce is valid.
		if ( ! wp_verify_nonce( $nonce_name, $nonce_action ) )
			return;
		
		// Check if the user has permissions to save data.
		if ( ! current_user_can( 'edit_post', $post_id ) )
			return;

		// Check if it's not an autosave.
		if ( wp_is_post_autosave( $post_id ) )
			return;

		// Check if it's not a revision.
		if ( wp_is_post_revision( $post_id ) )
			return;		

		// Sanitize input.
		$_showsidebar_new = isset( $_POST[ '_showsidebar' ] ) ? sanitize_text_field( $_POST[ '_showsidebar' ] ) : '';
		$_sidebarposition_new = isset( $_POST[ '_sidebarposition' ] ) ? sanitize_text_field( $_POST[ '_sidebarposition' ] ) : '';

		// Update the meta field in the database.
		update_post_meta( $post_id, '_showsidebar', $_showsidebar_new );
		update_post_meta( $post_id, '_sidebarposition', $_sidebarposition_new );
	}
}

new CustomSidebarMeta;