Pdo Sqlite and php - php

Question

I have a question related to php / pdo and sqlite. I have ported some code from a mysql backend to a sqlite backend. I have used rowCount() alot in this project.
In my original Mysql application i did this:
$stmt = $db->query("SELECT id FROM table where id = $id ");
$rc = $stmt->rowCount();
if ($rc == 1) {
// do something
}
The documentation says this method is only for returning affected rows from UPDATE, INSERT, DELETE queries, with the PDO_MYSQL driver (and this driver only) you can get the row count for SELECT queries.
So, how to achive the same thing with a sqlite backend?
This is how I have ended up doing it:
$stmt = $db->query("SELECT count(id) as cnt FROM table where id = $id ");
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
if ($row['cnt'] == "1") {
// do something
} else {
return false;
}
}
}
I am looking for a more elegant solution, while achieving the same thing as rowCount().

Answer 1

This is the way to do that in pdo:
$stmt = $db->query('SELECT * FROM table');
if ($stmt->rowCount() == 1) {
//...
} else {
//...
}
echo $row_count.' rows selected';
(The same way XD)
BTW, I wouldn't recommend doing something like
$stmt = $db->query("SELECT count(id) as cnt FROM table where id = $id ");
It's not good to have variables in statements like that. use something like:
$stmt = $db->query('SELECT id FROM table where id = ?');
$stmt->execute(array($id));
if ($stmt->rowCount() == 1)
{
$arr = $stmt->fetch(PDO::FETCH_ASSOC);
foreach($arr as $element)
{
echo '<pre>'.print_r($element).'</pre>';
}
}
else
{
//...
}
This is part of some code I'm using:
$stmt = $db->prepare('SELECT * FROM users WHERE id=?');
$stmt->execute(array($id));
if ($stmt->rowCount() == 1) {
$currentUser = $stmt->fetchAll(PDO::FETCH_ASSOC)[0];
} else {
return false;
}
Edit: (for compatibility issues)
$stmt = $db->query('SELECT * FROM table');
$arr = $stmt->fetchAll(PDO::FETCH_ASSOC);
if (($arr === false) || (sizeof($arr) == 0)) {
return false;
} else {
//... do ....
echo sizeof($arr);
}