问将选择的数组保存到Wordpress用户元中

EN

<label for="industryinterest"><?php _e('Industry of Interest', 'profile'); ?></label>

<p>Current selection: <?php the_author_meta( 'industryinterest', $current_user->ID ); ?></p>

<select name="industryinterest[]" multiple size="5" id="industryinterest">
  <option value="Agriculture">Agriculture</option>
  <option value="Consumer">Consumer</option>
  <option value="Energy">Energy</option>
  <option value="Financial Services">Financial Services</option>
  <option value="Healthcare">Healthcare</option>
  <option value="Manufacturing">Manufacturing</option>
  <option value="Nightlife">Nightlife</option>
  <option value="Philanthropic">Philanthropic</option>
  <option value="Property">Property</option>
  <option value="Restaurants">Restaurants</option>
  <option value="Retail">Retail</option>
  <option value="Science">Science</option>
  <option value="Technology">Technology</option>
  <option value="Telecommunications">Telecommunications</option>
  <option value="Transport">Transport</option>
</select>

  if ( !empty( $_POST['industryinterest'] ) )
        update_user_meta($current_user->ID, 'industryinterest', esc_attr( $_POST['industryinterest'][0] ) );