计数和行

Question

在这里，我想呼应了行数的回波数下面的代码显示语法错误

$check=$db->prepare("SELECT count (*) FROM follow WHERE uid_fk=:user_id"); 
$check->execute(array(':user_id'=>$user_id)); 
echo $check->rowCount(); 

Answer 1

试试这个：

$sql = "SELECT count(*) follow WHERE uid_fk=:user_id"; 
$result = $con->prepare($sql); 
$result->execute(); 
$rowCount = $result->fetchColumn();