Row count with PDO

Question

There are many conflicting statements around. What is the best way to get the row count using PDO in PHP? Before using PDO, I just simply used mysql_num_rows.

Answer 1

function count_x($connect) {  
 $query = "  SELECT * FROM tbl WHERE id = '0' ";  
 $statement = $connect->prepare($query);  $statement->execute();  
 $total_rows = $statement->rowCount();  
 return $total_rows; 
}

Answer 2

When it is matter of mysql how to count or get how many rows in a table with PHP PDO I use this

// count total number of rows
$query = "SELECT COUNT(*) as total_rows FROM sometable";
$stmt = $con->prepare($query);

// execute query
$stmt->execute();

// get total rows
$row = $stmt->fetch(PDO::FETCH_ASSOC);
$total_rows = $row['total_rows'];

credits goes to Mike @ codeofaninja.com

Answer 3

You can combine the best method into one line or function, and have the new query auto-generated for you:

function getRowCount($q){ 
    global $db;
    return $db->query(preg_replace('/SELECT [A-Za-z,]+ FROM /i','SELECT count(*) FROM ',$q))->fetchColumn();
}

$numRows = getRowCount($query);

Answer 4

For straight queries where I want a specific row, and want to know if it was found, I use something like:

function fetchSpecificRow(&$myRecord) {
    $myRecord = array();
    $myQuery = "some sql...";
    $stmt = $this->prepare($myQuery);
    $stmt->execute(array($parm1, $parm2, ...));
    if ($myRecord = $stmt->fetch(PDO::FETCH_ASSOC)) return 0;
    return $myErrNum;
}

Answer 5

Have a look at this link: http://php.net/manual/en/pdostatement.rowcount.php It is not recommended to use rowCount() in SELECT statements!

Answer 6

To use variables within a query you have to use bindValue() or bindParam(). And do not concatenate the variables with " . $variable . "

$statement = "SELECT count(account_id) FROM account
                  WHERE email = ? AND is_email_confirmed;";
$preparedStatement = $this->postgreSqlHandler->prepare($statement);
$preparedStatement->bindValue(1, $account->getEmail());
$preparedStatement->execute();
$numberRows= $preparedStatement->fetchColumn();

GL