执行此功能时出错 [英] Error during execution of this function

问题描述

可能重复：

Possible Duplicate:
Message: Invalid argument supplied for foreach in CodeIgniter

从继续操作：消息：CodeIgniter中为foreach提供的参数无效。

这是函数，$ data来自...。

This is the function, from which the $datais coming..

function getSearchedUniversityTab($country, $state, $level, $degType) {
      $query = $this->db->query("SELECT `university`.`uniId`, `university`.`name`
                                FROM (`university`)
                                inner JOIN (select degCollege, degType, count(*) as cnt  from degree where `degType` =  '$degType'  group by degCollege) clg
                                ON clg.`degCollege` = `university`.`uniId` 
                                WHERE `country` =  '$country'
                                AND `state` =  '$state'");
      $result = $query->result_array();

      foreach($result as $row)
      {
        $data[] = $row;
      }
      return $data;
      $this->db->close();  
   }

推荐答案

$ c> result 返回空
更改为

Most probable your result is returning empty Change to

function getSearchedUniversityTab($country, $state, $level, $degType) {
      $query = $this->db->query("SELECT `university`.`uniId`, `university`.`name`
                                FROM (`university`)
                                inner JOIN (select degCollege, degType, count(*) as cnt  from degree where `degType` =  '$degType'  group by degCollege) clg
                                ON clg.`degCollege` = `university`.`uniId` 
                                WHERE `country` =  '$country'
                                AND `state` =  '$state'");
      $result = $query->result_array();
     if(count($result) > 0 ) {
      foreach($result as $row)
      {
        $data[] = $row;
      }

      return $data;
     }else{
       return null;
     }
      $this->db->close();  
   }

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