在PDO查询中再次使用相同的变量

Question

I'm using PDO prepared statement. Here in the code i use variable res for first prepare statement & operations.

$res=$db->prepare("//code//");
$res->execute($array);
$count=$res->rowCount();

$res=$db->prepare("//code//");
$res->execute($array);
$res->fetch();

Will it create problems if i use reuse the variable for another prepared statement? Is it a wrong practice and should i use another variable for other statement?

Answer 1

If you're done with that variable, I think you can safely reuse it (I would do it), but some code conventions try to avoid this kind of behaviour.

See for example this other question: is it acceptable to recycle or reuse variables?