PDO FetchAll返回一个空数组,但db

时间:2016-08-05 11:08:04

标签: javascript php pdo

我有一个带有多个选择的下拉框。下拉列表如下所示:

 <select multiple class="form-control" name="batch_no[]"  id="batch_no" required onchange="getBatchCourseDetail();">
<option value="">-----------Select Your Batch----------</option>
<?php
foreach ($result as $res) 
{
  ?>
    <option value="<?php echo $res['batch_code']; ?>"><?php echo $res['batch_code']; ?></option>
<?php
 } ?>
</select>

在onchange函数调用中我有这样的脚本:

function getBatchCourseDetail()
{
    var other = String($('#batch_no').val());
    var opts = [],
    opt;
    var split1 = other.split(',');
    for (var i = 0; i < split1.length; i++) 
    {
       opt = split1[i];
       opts.push(opt);
    }
    $.ajax({
      url: 'course_apply_batch_course_detail_ajax.php',
      type: 'POST',
      data: 
      {
        batch_code: opts
      },
      success: function (data) 
      {
        //console.log(data);
        $('#batch_information_autofill').html(data);
      }
   });
}

在course_apply_course_detail_ajax.php页面的ajax文件中,我检索下拉列表的所有值。

course_apply_course_detail_ajax.php:

<?php
 require('classes/autoloader.php');
 $course_apply = new \Model\CourseApplyModel();
 $batch_code111=array();
 $batch_code111 = $_POST['batch_code'];
 $batch_code1 ="'" .implode("','",$batch_code111) ."'";

 $parameter = array(
    "batchcode" => $batch_code1,
    "status" => 0);

 $result11 =$course_apply->getBatchCourseDetail11($parameter);

 echo"<pre>";
 print_r($result11);
 echo"</pre>";
 exit;
 ?>

我将获得$ batch_code1值:&#39; LATS-CHMB-1000&#39; LATS-SA-1000&#39; LATS-ABSE-1003&#39; LATS-ABSE-1003&#39 ;它存储在数组变量&#39; batchcode&#39;。

在模型中我的查询如下所示:

 public function getBatchCourseDetail11($parameter)
{
 /* $QUERY1="SELECT start_date,end_date,course_code FROM batch WHERE
     batch_code IN('LATS-CHMB-1000','LATS-SA-1000','LATS-ABSE-1003') AND status =0"; */

  $query1="SELECT start_date,end_date,course_code FROM batch WHERE status =:status AND batch_code IN(:batchcode)";
  try{
        $result1=$this->dbh->prepare($query1);
        $result1->execute($parameter);
        $data11=$result1->fetchAll(\PDO::FETCH_ASSOC);
        return $data11;
    }
    catch(\PDOException $e)
    {
        print_r($e);
        return false;
    }

}

当我尝试打印返回数据时,我得到了array(),但查询在phpmyadmin中正确执行。

先谢谢,请帮我解决这个问题。

1 个答案:

答案 0 :(得分:0)

查询是您的问题

$query1="SELECT start_date,end_date,course_code 
         FROM batch 
         WHERE status =:status 
           AND batch_code IN(:batchcode)";

无法用占位符替换任意查询部分。因此,对于逗号分隔的占位符,如IN(),您必须手动创建一组?并将它们放入查询中:

简而言之,如果您在IN(?,?,?)列表中有3个值,则必须创建类似IN()的语法,然后将3个参数传递给准备。

public function getBatchCourseDetail11($parameter)
{
    // generate the number of ? we need
    $ins  = str_repeat('?,', count($parameter['batchcode']) - 1) . '?';

    $query1="SELECT start_date,end_date,course_code 
             FROM batch 
             WHERE status = ?
               AND batch_code IN($ins)";
    try{
        $result1=$this->dbh->prepare($query1);

        $params[] = $parameter['status'];
        foreach ( $parameter['batchcode'] as $p ) {
            $params[] = $p;
        }

        $result1->execute($params);

        $data11=$result1->fetchAll(\PDO::FETCH_ASSOC);
        return $data11;
    }
    catch(\PDOException $e) {
        print_r($e);
        return false;
    }

}