目前，我正在使用WooCommerce for WordPress，并尝试为变体产品添加自定义字段。在做了一些研究之后，我找到了一些代码并尝试对其进行修改。

这是我的完整代码：https://gist.github.com/alphadc/da163cc95cfd1cede34a

add_action( \'woocommerce_product_after_variable_attributes\', \'variable_fields\', 10, 2 );
add_action( \'woocommerce_product_after_variable_attributes_js\', \'variable_fields_js\' );
add_action( \'woocommerce_process_product_meta_variable\', \'save_variable_fields\', 10, 1 );
add_action( \'woocommerce_process_product_meta_variable-subscription\' , \'save_variable_fields\' , 10 , 1 ) ;

function variable_fields( $loop, $variation_data ) {?>
<tr>
<td>
  <?php
  woocommerce_wp_textarea_input( 
    array( 
      \'id\'          => \'_weightdesc[\'.$loop.\']\', 
      \'label\'       => __( \'Weight Description\', \'woocommerce\' ), 
      \'placeholder\' => \'\', 
      \'description\' => __( \'Enter the custom value here.\', \'woocommerce\' ),
      \'value\'       => $variation_data[\'_weightdesc\'][0],
    )
  );
  ?>
</td>
 </tr>
<?php }
function variable_fields_js()?>
<tr>
<td>
  <?php
  woocommerce_wp_textarea_input( 
    array( 
      \'id\'          => \'_weightdesc[ + loop + ]\', 
      \'label\'       => __( \'My Textarea\', \'woocommerce\' ), 
      \'placeholder\' => \'\', 
      \'description\' => __( \'Enter the custom value here.\', \'woocommerce\' ),
      \'value\'       => $variation_data[\'_weightdesc\'][0],
    )
  );
  ?>
   </td>
  </tr>
<?php }
function save_variable_fields( $post_id ) {
  if (isset( $_POST[\'variable_sku\'] ) ) :

$variable_sku          = $_POST[\'variable_sku\'];
$variable_post_id      = $_POST[\'variable_post_id\'];

// Textarea
$_weightdesc = $_POST[\'_weightdesc\'];
for ( $i = 0; $i < sizeof( $variable_sku ); $i++ ) :
  $variation_id = (int) $variable_post_id[$i];
  if ( isset( $_weightdesc[$i] ) ) {
    update_post_meta( $variation_id, \'_weightdesc\', stripslashes( $_weightdesc[$i] ) );
  }
endfor;


endif;
}

该字段显示在我的后端，但当我试图保存该值时，它不起作用。我也试图修改它，但仍然不起作用。

我从多个来源找到了这段代码，其中一个来源是：http://www.remicorson.com/woocommerce-custom-fields-for-variations/#comment-14159

我认为这是因为WooCommerce的更新（我使用的是2.3.5）。

谁能帮帮我吗？

add_action( \'woocommerce_product_after_variable_attributes\', \'variable_fields\', 10, 2 );

add_action( \'woocommerce_variation_options\', \'variable_fields\', 10, 3 );

\'value\'       => $variation_data[\'_weightdesc\'][0],

\'value\' => get_post_meta($variation->ID, \'_weightdesc\', true)

add_action( \'woocommerce_process_product_meta_variable\', \'save_variable_fields\', 10, 1 );

add_action( \'woocommerce_save_product_variation\', \'save_variable_fields\', 10, 1 );

function variation_settings_fields( $loop, $variation_data, $variation ) {

    // Text Field
    woocommerce_wp_text_input(
        array(
            \'id\'          => \'_text_field[\' . $variation->ID . \']\',
            \'label\'       => __( \'My Text Field\', \'woocommerce\' ),
            \'placeholder\' => \'\',
            \'desc_tip\'    => \'true\',
            \'description\' => __( \'Enter the custom value here.\', \'woocommerce\' ),
            \'value\'       => get_post_meta( $variation->ID, \'_text_field\', true )
        )
    );

}
add_action( \'woocommerce_product_after_variable_attributes\', \'variation_settings_fields\', 10, 3 );

function save_variation_settings_fields( $post_id ) {

    // Text Field
    $text_field = $_POST[\'_text_field\'][ $post_id ];
    if ( ! empty( $text_field ) ) {
        update_post_meta( $post_id, \'_text_field\', esc_attr( $text_field ) );
    }
}

add_action( \'woocommerce_save_product_variation\', \'save_variation_settings_fields\', 10, 2 );