Source of class-wc-order-item-meta.php - main

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                        <dd class="variation-' . sanitize_html_class( sanitize_text_field( $meta['key'] ) ) . '">' . wp_kses_post( wpautop( make_clickable( $meta['value'] ) ) ) . '</dd>
 
<?php
/**
 * Order Item Meta
 *
 * A Simple class for managing order item meta so plugins add it in the correct format.
 *
 * @package     WooCommerce\Classes
 * @deprecated  3.0.0 wc_display_item_meta function is used instead.
 * @version     2.4
 */
​
defined( 'ABSPATH' ) || exit;
​
/**
 * Order item meta class.
 */
class WC_Order_Item_Meta {
​
    /**
     * For handling backwards compatibility.
     *
     * @var bool
     */
    private $legacy = false;
​
    /**
     * Order item
     *
     * @var array|null
     */
    private $item = null;
​
    /**
     * Post meta data
     *
     * @var array|null
     */
    public $meta = null;
​
    /**
     * Product object.
     *
     * @var WC_Product|null
     */
    public $product = null;
​
    /**
     * Constructor.
     *
     * @param array       $item defaults to array().
     * @param \WC_Product $product defaults to null.
     */
    public function __construct( $item = array(), $product = null ) {
        wc_deprecated_function( 'WC_Order_Item_Meta::__construct', '3.1', 'WC_Order_Item_Product' );
​
        // Backwards (pre 2.4) compatibility.
        if ( ! isset( $item['item_meta'] ) ) {
            $this->legacy = true;
            $this->meta   = array_filter( (array) $item );
            return;
        }
        $this->item    = $item;
        $this->meta    = array_filter( (array) $item['item_meta'] );