Php 防止在WordPress短代码中显示重复产品并请求代码更正

我审阅了您的代码，您维护了一个全局数组$GLOBALS[‘MY_SHORTCODE_USED’]来跟踪已在帖子中显示的产品.

我已经修改了您的代码，请判断:

function get_product_id() {
    $args = array(
        'limit' => -1,
        'status' => 'publish',
        'return' => 'ids',
    );
    $all_products = wc_get_products( $args );

    $post_id = get_the_ID();
    $used_products = isset($GLOBALS['my_shortcode_used'][$post_id]) ? $GLOBALS['my_shortcode_used'][$post_id] : [];

    $unused_products = array_diff($all_products, $used_products);

    if(empty($unused_products)) {
        return null;
    }

    $key = array_rand($unused_products);
    $product_id = $unused_products[$key];

    $GLOBALS['my_shortcode_used'][$post_id][] = $product_id;

    return $product_id;
}

function my_shortcode() {
    $products_id = get_product_id();
    
    if(!$products_id) {
        return "All products ";  
    }

    $product = wc_get_product( $products_id );
    $product_price = $product->get_price();           
    $product_sale_price = $product->get_sale_price(); 
    $product_regular_price = $product->get_regular_price();
    
    if (isset($product_price) && $product_price > 0) {
        $product_price = number_format($product_price);  
    }
    if (isset($product_sale_price) && $product_sale_price > 0) {
        $product_sale_price = number_format($product_sale_price);  
    }
    if (isset($product_regular_price) && $product_regular_price > 0) {
        $product_regular_price = number_format($product_regular_price); 
    }
    
    $product_price_currency_symbol = get_woocommerce_currency_symbol();
    $image_id  = $product->get_image_id();
    $product_image = wp_get_attachment_image_url( $image_id, 'full' );  
    $product_title = $product->get_title();
    $product_link = $product->get_permalink();
    $discount = '';
    
    if ($product->is_on_sale()) {
        $max_percentage = 0;
        $percentage = 0;
        $price = $product->get_regular_price();
        $sale = $product->get_sale_price();
        if ($price != 0 && ! empty($sale)) {
            $percentage = ($price - $sale) / $price * 100;
        }
        if ($percentage > $max_percentage) {
            $max_percentage = $percentage;
        }
        if ($max_percentage <> 0) {
            $discount = '<div class="saved-sale">-' . round($max_percentage) . '% Off</div>';
        }
    } else {
        $product_regular_price = '';
    }
    
    $output = '
        <a href="' . $product_link . '">
            <img src="' . $product_image . '">
            <span> '. $discount .' </span>
            <span> ' . $product_title . ' </span>
        </a>';

    if ( ! isset( $GLOBALS['my_shortcode_used'] ) ) {
        $GLOBALS['my_shortcode_used'] = [];
    }

    $post_id = get_the_ID();

    if ( ! isset( $GLOBALS['my_shortcode_used'][ $post_id ] ) || ! is_array( $GLOBALS['my_shortcode_used'][ $post_id ] ) ) {
        $GLOBALS['my_shortcode_used'][ $post_id ] = [];
    }

    $values = ['1' => $output]; 

    $unused_values = array_diff( $values, $GLOBALS['my_shortcode_used'][ $post_id ] );

    if ( empty( $unused_values ) ) {
        return "Alternative text";
    }

    $key = array_rand( $unused_values );

    $GLOBALS['my_shortcode_used'][ $post_id ][] = $unused_values[ $key ];

    return $unused_values[ $key ];
}
add_shortcode('jock', 'my_shortcode');