php codeigniter事件记录替换功能

Question

我想使用 codeigniter 在 mysql 查询中使用替换功能，但卡住了，它不起作用

function getmakeid($make_name)
{

    $content_query = $this->db->query("select Make_ID from make where LOWER(REPLACE(Make_name, ' ', '')) = ".$make_name);
    $content_query = $this->db->get();
    if($content_query->num_rows() > 0)
    {
        return $content_query->result();
    }else{
        return false;
    }
}

返回错误

Error Number: 1054

Unknown column 'A3Cabriolet' in 'where clause'

select
  model_id
from model
where LOWER(REPLACE(model_name, ' ', '')) = A3Cabriolet

Filename: C:\wamp\www\system\database\DB_driver.php Line Number: 330"

Answer 1

尝试用这样的逗号包裹您的查询

$query  =   "SELECT
              Make_ID
            FROM make
            WHERE LOWER(REPLACE(Make_name, ' ', '')) = "."'"$make_name."'";

$content_query = $this->db->query($query);  

此外，当您运行查询一次后，为什么还需要这个

$content_query = $this->db->get();