PHP：无法获取json输出到我的javascript页面作为一个变量值 [英] PHP: Unable to get the json output into my javascript page as a variable value

问题描述

我必须以这种格式输出
var sampleTags = ['c ++'，'scala'];

i have to get output in this format var sampleTags = ['c++', 'scala'];

我的javascript功能是：

My javascript function is:

 <script>
            $(document).ready(function(){
        $(function(){  
             var sampleTags;

            $.ajax({
                url:"<?php echo base_url('ajax_get_tags/gettags'); ?>"
            }).done(function(data) {
                if (data) {
                   sampleTags = data;
                }
            });
       ......................
        .......................



 $(function(){  
     var sampleTags = <?php echo json_encode($query) ?>;

我的php控制器是

   function gettags(){
    $json_array=$this->tagsmodel->get_all_tags(); 
   echo json_encode($json_array); 
 }

我的模型是

 //-------------------------------Function get all tags--------------------------------
function get_all_tags() { 
    $this->load->database();
    $this->db->limit('10');
    $this->db->select('tags_name');
    $res = $this->db->get('tags');
    $ret = array();

    foreach ($res->result_array() as $row) {
          $ret[] = $row['tags_name'];
    }

    return $ret;
}

如何获取ajax请求的json输出javascript变量？
请帮我解决这个问题..

How can get the json output from ajax request to be display its value for a javascript variable? Please help me to solve this issue..

推荐答案

您使用的是旧版本的jQuery， code> .done 将无法工作。看起来您希望向名为 complete 的请求对象添加键，并使用匿名函数作为其值：

You're using an older version of jQuery, so .done won't work. It looks like you want to add a key to your request object called complete, with the anonymous function as its value:

$.ajax({
  url: "<?php echo base_url('ajax_get_tags/gettags'); ?>",
  complete: function(data) {
      if (data) {
          sampleTags = data;
      }
  }
});

我通过查看您的错误消息找到了这一点。其中一个结果是这个问题： Object＃< XMLHttpRequest>没有方法完成。你可以只是google了错误信息，并自己想出了这一点。

I found this out by googling your error message. One of the results was this question: Object #<XMLHttpRequest> has no method 'done'. You could have just googled the error message and figured this out yourself.

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