// 安装php-serialized模块
// npm install php-serialized --save

angular.module('myApp').controller('WPController', function($http, $scope) {
  $http.get('https://your-wordpress-site.com/wp-json/wp/v2/posts/123')
    .then(function(response) {
      var serialized = response.data.meta.your_meta_key;
      
      // 使用php-serialized库反序列化
      var unserialized = require('php-serialized').unserialize(serialized);
      
      $scope.metaData = unserialized;
    });
});

// 在主题的functions.php中添加
add_action('rest_api_init', function() {
  register_rest_field('post', 'unserialized_meta', array(
    'get_callback' => function($object) {
      $meta = get_post_meta($object['id']);
      foreach ($meta as $key => $value) {
        if (is_serialized($value[0])) {
          $meta[$key] = unserialize($value[0]);
        } else {
          $meta[$key] = $value[0];
        }
      }
      return $meta;
    },
    'schema' => null,
  ));
});

// 存储时
update_post_meta($post_id, 'meta_key', json_encode($data));

// 获取时
$data = json_decode(get_post_meta($post_id, 'meta_key', true));