I have been reusing the same variable $stmt in my PHP script to write

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Asked: May 27, 20262026-05-27T04:27:39+00:00 2026-05-27T04:27:39+00:00

I have been reusing the same variable $stmt in my PHP script to write

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I have been reusing the same variable $stmt in my PHP script to write prepared statements:

$stmt = $dbh->prepare("SELECT column_A FROM Table1 WHERE id=?");
$stmt->bindValue(1, $id, PDO::PARAM_INT);
$stmt->execute();
....

$stmt = $dbh->prepare("UPDATE Table2 SET column_B=? WHERE column_A=?");
$stmt->bindValue(1, $name);
$stmt->bindValue(2, $column_A);
$stmt->execute();

My question is, how do I know if the two statements are being written to cache and that the second statement did not overwrite the first statement though both statements are sharing the same variable name?