这里我假设您的json是一个对象数组，其中的属性命名如下wp_insert_post arguments: \'post\\u标题、“post\\u内容”等。

function process_ajax() {  
    if ( ! isset($_POST[\'nonce\']) || ! wp_verify_nonce($_POST[\'nonce\'], \'mynonce\') )
       die(\'error on checking nonce\');  
    if ( ! isset($_POST[\'filepath\']) die(\'no file given\');
    if ( ! file_exists($_POST[\'filepath\']) ) die(\'invalid file given\');
    $posts = json_decode( file_get_contents($_POST[\'filepath\']) );
    $done = 0;
    if ($posts) { 
      foreach ( $posts as $post) {
        $post = (array)$post;
        if ( isset($post[\'ID\']) ) unset($post[\'ID\']);
        if ( wp_insert_post($post) ) $done++;
      } 
      $str = "Successfully insert " . $done . "posts, ";
      $str .=  ( count($posts) - $done ) . \' failed.\'
      die($str);
    } else {
      die(\'File contains not valid Json.\');
    }
  }