WooCommerce - 自定义缩略图和默认的后退图像占位符

Question

我只想在woocommerce_get_product_thumbnail中插入一个包装器,我可以看到我的包装器出现但是如果没有图像,它没有后退图像.

如何输出默认的woocommerce缩略图？

这是我不完整的代码:

remove_action( 'woocommerce_before_shop_loop_item_title', 'woocommerce_template_loop_product_thumbnail', 10);
add_action( 'woocommerce_before_shop_loop_item_title', 'woocommerce_template_loop_product_thumbnail', 10);

if ( ! function_exists( 'woocommerce_template_loop_product_thumbnail' ) ) {
    function woocommerce_template_loop_product_thumbnail() {
        echo woocommerce_get_product_thumbnail();
    } 
}
if ( ! function_exists( 'woocommerce_get_product_thumbnail' ) ) {   
    function woocommerce_get_product_thumbnail( $size = 'shop_catalog', $placeholder_width = 0, $placeholder_height = 0  ) {
        global $post, $woocommerce;
        $output = '<div class="col-lg-4">';

        if ( has_post_thumbnail() ) {               
            $output .= get_the_post_thumbnail( $post->ID, $size );
        } else {
            how to show the default woocommerce thumb 
        }                       
        $output .= '</div>';
        return $output;
    }
}

Answer 1

试试下面的代码

remove_action( 'woocommerce_before_shop_loop_item_title', 'woocommerce_template_loop_product_thumbnail', 10);
add_action( 'woocommerce_before_shop_loop_item_title', 'woocommerce_template_loop_product_thumbnail', 10);

if ( ! function_exists( 'woocommerce_template_loop_product_thumbnail' ) ) {
    function woocommerce_template_loop_product_thumbnail() {
        echo woocommerce_get_product_thumbnail();
    } 
}
if ( ! function_exists( 'woocommerce_get_product_thumbnail' ) ) {   
    function woocommerce_get_product_thumbnail( $size = 'shop_catalog', $placeholder_width = 0, $placeholder_height = 0  ) {
        global $post, $woocommerce;
        $output = '<div class="col-lg-4">';

        if ( has_post_thumbnail() ) {               
            $output .= get_the_post_thumbnail( $post->ID, $size );
        } else {
             $output .= wc_placeholder_img( $size );
        }                       
        $output .= '</div>';
        return $output;
    }
}

Answer 2

当WordPress/WooCommerce初始化时,我已经init为remove_action&添加了一个钩子add_action来启动它...

正如$placeholder_width = 0, $placeholder_height = 0woocommerce 2.0版本所推荐的那样(见本文).你不再需要它们,它可能是你问题的一部分.

注意:pallavi的答案$output .= wc_placeholder_img( $size );在你的else语句中是正确的.我已经为此投票了......

所以我改变了一下你的代码:

add_action('init', function(){
    remove_action( 'woocommerce_before_shop_loop_item_title', 'woocommerce_template_loop_product_thumbnail', 10);
    add_action( 'woocommerce_before_shop_loop_item_title', 'woocommerce_template_loop_product_thumbnail', 10);
}

if ( ! function_exists( 'woocommerce_template_loop_product_thumbnail' ) ) {
    function woocommerce_template_loop_product_thumbnail() {
        echo woocommerce_get_product_thumbnail();
    } 
}

if ( ! function_exists( 'woocommerce_get_product_thumbnail' ) ) {   
    function woocommerce_get_product_thumbnail( $size = 'shop_catalog' ) {
        global $post, $woocommerce;
        $output = '<div class="col-lg-4">';

        if ( has_post_thumbnail() ) {               
            $output .= get_the_post_thumbnail( $post->ID, $size );
        } else {
             $output .= wc_placeholder_img( $size );
             // Or alternatively setting yours width and height shop_catalog dimensions.
             // $output .= '<img src="' . woocommerce_placeholder_img_src() . '" alt="Placeholder" width="300px" height="300px" />';
        }                       
        $output .= '</div>';
        return $output;
    }
}