wp плагин старт

wp-start-plugin.php

<?php

/**
 * Plugin Name: Halloween Store
 * Plugin URI: https://wordimpress.com/
 * Description: Rollback (or forward) any WordPress.org plugin or theme like a boss.
 * Author: WordImpress
 * Author URI: https://wordimpress.com/
 * Version: 1.5
 * Text Domain: wp-rollback
 * Domain Path: /languages
 *
 * WP Rollback is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * any later version.
 *
 * WP Rollback is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with WP Rollback. If not, see <http://www.gnu.org/licenses/>.
 */


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

// Вызываем функцию, когда активируется плагин
register_activation_hook( __FILE__, 'halloween_store_install' );

function halloween_store_install() {
    global $wp_version;
    if ( version_compare( $wp_version, '3.5', '<' ) ) {
        wp_die( 'This plugin requires WordPress version 3.5 or higher.' );
    }
   // устанавливаем параметры no умолчанию
    $hween_options_arr = array(
        'currency_sign' => '$'
    );

    //save our default option values
    update_option( 'halloween_options', $hween_options_arr );
    
}


// Зацепка-действие для инициализации плагина
add_action( 'init', 'halloween_store_init' );
function halloween_store_init() {

    //register the products custom post type
    $labels = array(
        'name' => __( 'Products', 'halloween-plugin' ),
        'singular_name' => __( 'Product', 'halloween-plugin' ),
        'add_new' => __( 'Add New', 'halloween-plugin' ),
        'add_new_item' => __( 'Add New Product', 'halloween-plugin' ),
        'edit_item' => __( 'Edit Product', 'halloween-plugin' ),
        'new_item' => __( 'New Product', 'halloween-plugin' ),
        'all_items' => __( 'All Products', 'halloween-plugin' ),
        'view_item' => __( 'View Product', 'halloween-plugin' ),
        'search_items' => __( 'Search Products', 'halloween-plugin' ),
        'not_found' =>  __( 'No products found', 'halloween-plugin' ),
        'not_found_in_trash' => __( 'No products found in Trash', 'halloween-plugin' ),
        'menu_name' => __( 'Products', 'halloween-plugin' )
      );
    
      $args = array(
        'labels' => $labels,
        'public' => true,
        'publicly_queryable' => true,
        'show_ui' => true, 
        'show_in_menu' => true, 
        'query_var' => true,
        'rewrite' => true,
        'capability_type' => 'post',
        'has_archive' => true, 
        'hierarchical' => false,
        'menu_position' => null,
        'supports' => array( 'title', 'editor', 'thumbnail', 'excerpt' )
      ); 
      
      register_post_type( 'halloween-products', $args );

}


/*========================================================
        *  добавить отображение в админ меню
        ========================================================*/
add_action( 'admin_menu', 'halloween_store_menu' );

// создаем подпункт меню Halloween Masks
function halloween_store_menu() {
    // 1-название страниы
    // 2-название подпункта
    // 3-видимость меню(manage_options-только админы)
    // 4-ID
    // 5-функция для построения страницы параметров
    add_options_page( __( 'Halloween Store Settings Page', 'halloween-plugin' ), __( 'Halloween Store Settings', 'halloween-plugin' ), 'manage_options', 'halloween-store-settings', 'halloween_store_settings_page' );
}
function halloween_store_settings_page() {
    
   // извлекаем массив настроек плагина
    $hween_options_arr = get_option( 'halloween_options' );
    
    // устанавливаем значения переменных из массива
    $hs_inventory = ( ! empty( $hween_options_arr['show_inventory'] ) ) ? $hween_options_arr['show_inventory'] : '';
    $hs_currency_sign = $hween_options_arr['currency_sign'];
    ?>
    <div class="wrap">
    <h2><?php _e( 'Halloween Store Options', 'halloween-plugin' ) ?></h2>

    <form method="post" action="options.php">
        <?php settings_fields( 'halloween-settings-group' ); ?>
        <table class="form-table">
            <tr valign="top">
            <th scope="row"><?php _e( 'Show Product Inventory', 'halloween-plugin' ) ?></th>
            <td><input type="checkbox" name="halloween_options[show_inventory]" <?php echo checked( $hs_inventory, 'on' ); ?> /></td>
            </tr>

            <tr valign="top">
            <th scope="row"><?php _e( 'Currency Sign', 'halloween-plugin' ) ?></th>
            <td><input type="text" name="halloween_options[currency_sign]" value="<?php echo esc_attr( $hs_currency_sign ); ?>" size="1" maxlength="1" /></td>
            </tr>
        </table>

        <p class="submit">
        <input type="submit" class="button-primary" value="<?php _e( 'Save Changes', 'halloween-plugin' ); ?>" />
        </p>

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

/*========================================================
        *  вызываем функцию лучшая для регистрации настроек
        ========================================================*/
add_action( 'admin_init', 'halloween_store_register_settings' );
function halloween_store_register_settings() {
// регистрируем настройки
            //1й- имя группы параметров
            //2й- иникальное имя
            //3й- функия для очистки неверных значений и хака
    register_setting( 'halloween-settings-group', 'halloween_options', 'halloween_sanitize_options' );
    
}
function halloween_sanitize_options( $options ) {
    
    $options['show_inventory'] = ( ! empty( $options['show_inventory'] ) ) ? sanitize_text_field( $options['show_inventory'] ) : '';
    $options['currency_sign'] = ( ! empty( $options['currency_sign'] ) ) ? sanitize_text_field( $options['currency_sign'] ) : '';
    
    return $options;
    
}

/*========================================================
        *        добавить мета-боксы
        ========================================================*/
add_action( 'add_meta_boxes', 'halloween_store_register_meta_box' );
function halloween_store_register_meta_box() {
// <!-- Каждый параметр помогает определить, где и как отображается метаполе.
// $id (атрибут ID CSS для метаполя);
// $title (название страницы, отображаемое в заголовке метаполя);
// $callback (имя произвольной функции для отображения в информации метаполя);
// $page (страница, на которой должно отображаться метаполе, — ' post' , 'page' или название индивидуального типа записи);
// $context (часть страницы, в которой должно быть отображено метаполе, — 'normal', 'advanced' или 'side');
// $priority (где именно в выбранной части страницы должно отображаться метаполе — 'high', 'core', 'default' или 'low');
// $callback_args (аргументы для передачи функции обратного вызова). -->
    add_meta_box( 'halloween-product-meta', __( 'Product Information','halloween-plugin' ), 'halloween_meta_box', 'halloween-products', 'side', 'default' );
    
}
function halloween_meta_box( $post ) {

   // извлекаем значения произвольного метаполя
    $hween_sku = get_post_meta( $post->ID, '_halloween_product_sku', true );
    $hween_price = get_post_meta( $post->ID, '_halloween_product_price', true );
    $hween_weight = get_post_meta( $post->ID, '_halloween_product_weight', true );
    $hween_color = get_post_meta( $post->ID, '_halloween_product_color', true );
    $hween_inventory = get_post_meta( $post->ID, '_halloween_product_inventory', true );

    //nonce field for security
    wp_nonce_field( 'meta-box-save', 'halloween-plugin' );
    
    // display meta box form
    echo '<table>';
    echo '<tr>';
    echo '<td>' .__('Sku', 'halloween-plugin').':</td><td><input type="text" name="halloween_product_sku" value="'.esc_attr( $hween_sku ).'" size="10"></td>';
    echo '</tr><tr>';
    echo '<td>' .__('Price', 'halloween-plugin').':</td><td><input type="text" name="halloween_product_price" value="'.esc_attr( $hween_price ).'" size="5"></td>';
    echo '</tr><tr>';
    echo '<td>' .__('Weight', 'halloween-plugin').':</td><td><input type="text" name="halloween_product_weight" value="'.esc_attr( $hween_weight ).'" size="5"></td>';
    echo '</tr><tr>';
    echo '<td>' .__('Color', 'halloween-plugin').':</td><td><input type="text" name="halloween_product_color" value="'.esc_attr( $hween_color ).'" size="5"></td>';
    echo '</tr><tr>';
    echo '<td>Inventory:</td><td><select name="halloween_product_inventory" id="halloween_product_inventory">
            <option value="In Stock"' .selected( $hween_inventory, 'In Stock', false ). '>' .__( 'In Stock', 'halloween-plugin' ). '</option>
            <option value="Backordered"' .selected( $hween_inventory, 'Backordered', false ). '>' .__( 'Backordered', 'halloween-plugin' ). '</option>
            <option value="Out of Stock"' .selected( $hween_inventory, 'Out of Stock', false ). '>' .__( 'Out of Stock', 'halloween-plugin' ). '</option>
            <option value="Discontinued"' .selected( $hween_inventory, 'Discontinued', false ). '>' .__( 'Discontinued', 'halloween-plugin' ). '</option>
        </select></td>';
    echo '</tr>';

    //display the meta box shortcode legend section
    echo '<tr><td colspan="2"><hr></td></tr>';
    echo '<tr><td colspan="2"><strong>' .__( 'Shortcode Legend', 'halloween-plugin' ).'</strong></td></tr>';
    echo '<tr><td>' .__( 'Sku', 'halloween-plugin' ) .':</td><td>[hs show=sku]</td></tr>';
    echo '<tr><td>' .__( 'Price', 'halloween-plugin' ).':</td><td>[hs show=price]</td></tr>';
    echo '<tr><td>' .__( 'Weight', 'halloween-plugin' ).':</td><td>[hs show=weight]</td></tr>';
    echo '<tr><td>' .__( 'Color', 'halloween-plugin' ).':</td><td>[hs show=color]</td></tr>';
    echo '<tr><td>' .__( 'Inventory', 'halloween-plugin' ).':</td><td>[hs show=inventory]</td></tr>';
    echo '</table>';
}

/*========================================================
        *        сохраним мета-боксы
        ========================================================*/
add_action( 'save_post','halloween_store_save_meta_box' );
function halloween_store_save_meta_box( $post_id ) {
     // обрабатываем данные формы, если установлена переменная $_POST
    if ( get_post_type( $post_id ) == 'halloween-products' && isset( $_POST['halloween_product_sku'] ) ) {
        
        //if autosave skip saving data
        if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) 
            return;

        //check nonce for security
        check_admin_referer( 'meta-box-save', 'halloween-plugin' );

        // save the meta box data as post metadata
        update_post_meta( $post_id, '_halloween_product_sku', sanitize_text_field( $_POST['halloween_product_sku'] ) );
        update_post_meta( $post_id, '_halloween_product_price', sanitize_text_field( $_POST['halloween_product_price'] ) );
        update_post_meta( $post_id, '_halloween_product_weight', sanitize_text_field( $_POST['halloween_product_weight'] ) );
        update_post_meta( $post_id, '_halloween_product_color', sanitize_text_field( $_POST['halloween_product_color'] ) );
        update_post_meta( $post_id, '_halloween_product_inventory',sanitize_text_field( $_POST['halloween_product_inventory'] ) );
    }
}

/*========================================================
        *       добавим шорткоды
        ========================================================*/
add_shortcode( 'hs', 'halloween_store_shortcode' );
function halloween_store_shortcode( $atts, $content = null ) {
    global $post;
    
    extract( shortcode_atts( array(
        "show" => ''
    ), $atts ) );

    //load options array
    $hween_options_arr = get_option( 'halloween_options' );

    if ( $show == 'sku') {
        
        $hs_show = get_post_meta( $post->ID, '_halloween_product_sku', true );
        
    }elseif ( $show == 'price' ) {
        
        $hs_show = $hween_options_arr['currency_sign']. get_post_meta( $post->ID, '_halloween_product_price', true );
        
    }elseif ( $show == 'weight' ) {
        
        $hs_show = get_post_meta( $post->ID, '_halloween_product_weight', true );
        
    }elseif ( $show == 'color' ) {
        
        $hs_show = get_post_meta( $post->ID, '_halloween_product_color', true );
        
    }elseif ( $show == 'inventory' ) {
        
        $hs_show = get_post_meta( $post->ID, '_halloween_product_inventory', true );
        
    }

    //return the shortcode value to display
    return $hs_show;
}

/*========================================================
        *        добавить виджет
        ========================================================*/
add_action( 'widgets_init', 'halloween_store_register_widgets' );

//register the widget
function halloween_store_register_widgets() {
    
    register_widget( 'hs_widget' );
    
}

//hs_widget class
class hs_widget extends WP_Widget {

    //process our new widget
    function hs_widget() {
        
        $widget_ops = array(
            'classname'   => 'hs-widget-class',
            'description' => __( 'Display Halloween Products','halloween-plugin' ) );
        $this->WP_Widget( 'hs_widget', __( 'Products Widget','halloween-plugin'), $widget_ops );
        
    }

    //build our widget settings form
    function form( $instance ) {
        
        $defaults = array( 
            'title'           => __( 'Products', 'halloween-plugin' ), 
            'number_products' => '3' );
        
        $instance = wp_parse_args( (array) $instance, $defaults );
        $title = $instance['title'];
        $number_products = $instance['number_products'];
        ?>
            <p><?php _e('Title', 'halloween-plugin') ?>: 
                <input class="widefat" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>" /></p>
            <p><?php _e( 'Number of Products', 'halloween-plugin' ) ?>: 
                <input name="<?php echo $this->get_field_name( 'number_products' ); ?>" type="text" value="<?php echo esc_attr( $number_products ); ?>" size="2" maxlength="2" />
            </p>
        <?php
    }

    //save our widget settings
    function update( $new_instance, $old_instance ) {
        
        $instance = $old_instance;
        $instance['title'] = sanitize_text_field( $new_instance['title'] );
        $instance['number_products'] = absint( $new_instance['number_products'] );

        return $instance;
        
    }

     //display our widget
    function widget( $args, $instance ) {
        global $post;
        
        extract( $args );

        echo $before_widget;
        $title = apply_filters( 'widget_title', $instance['title'] );
        $number_products = $instance['number_products'];

        if ( ! empty( $title ) ) { echo $before_title . esc_html( $title ) . $after_title; };

        //custom query to retrieve products
        $args = array(
            'post_type'         =>  'halloween-products',
            'posts_per_page'    =>  absint( $number_products )
        );
        
        $dispProducts = new WP_Query();
        $dispProducts->query( $args );
        
        while ( $dispProducts->have_posts() ) : $dispProducts->the_post();

            //load options array
            $hween_options_arr = get_option( 'halloween_options' );

            //load custom meta values
            $hs_price = get_post_meta( $post->ID, '_halloween_product_price', true );
            $hs_inventory = get_post_meta( $post->ID, '_halloween_product_inventory', true );
            ?>
            <p>
                <a href="<?php the_permalink(); ?>" rel="bookmark" title="<?php the_title_attribute(); ?> Product Information">
                <?php the_title(); ?>
                </a>
            </p>
            <?php
            echo '<p>' .__( 'Price', 'halloween-plugin' ). ': '.$hween_options_arr['currency_sign'] .$hs_price .'</p>';

            //check if Show Inventory option is enabled
            if ( $hween_options_arr['show_inventory'] ) {
                
                //display the inventory metadata for this product
                echo '<p>' .__( 'Stock', 'halloween-plugin' ). ': ' .$hs_inventory .'</p>';
                
            }
            echo '<hr>';

        endwhile;
        
        wp_reset_postdata();

        echo $after_widget;
        
    }
    
}