PHP：PDO为什么此代码不起作用？

Question

i cant get it why it is not working

$q1=$conn->prepare('select * from users where username = :data');
    $q1->bindParam(':data',$searchdata);//$searchdata is having the value
    $q1->execute();

       if($q1->rowCount()<1)
    {
        die('NO results found');
    }
    $row=$q1->fetch(PDO::FETCH_ASSOC);
    echo $row['user_id'];

The DEBUG DUMP PARAMS RETURNS THIS

select * from users where match(username) against(:searchd) Params: 1 Key: Name: [8] :searchd paramno=-1 name=[8] ":searchd" is_param=1 param_type=2

Why everytime i am getting empty result? anything wrong in this code. please help.

Answer 1

MySQL要求您使用缓冲的查询 ，因为在获取所有行之前， rowCount()方法无法知道结果集中有多少行。

Answer 2

Try this..

$rowCount = $pdo->query('select count(*) from blah')->fetchColumn(); 

 if(count($rowCount) > 0)
 {
       //Your code here
 } else {
     die();
 }