PdoWrapper PDO Helper Class

Flight comes with a helper class for PDO. It allows you to easily query your database with all the prepared/execute/fetchAll() wackiness. It greatly simplifies how you can query your database.

Registering the PDO Helper Class

// Register the PDO helper class
Flight::register('db', \flight\database\PdoWrapper::class, ['mysql:host=localhost;dbname=cool_db_name', 'user', 'pass', [
        PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES \'utf8mb4\'',
        PDO::ATTR_EMULATE_PREPARES => false,
        PDO::ATTR_STRINGIFY_FETCHES => false,
        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
    ]
]);

Usage

This object extends PDO so all the normal PDO methods are available. The following methods are added to make querying the database easier:

runQuery(string $sql, array $params = []): PDOStatement

Use this for INSERTS, UPDATES, or if you plan on using a SELECT in a while loop

$db = Flight::db();
$statement = $db->runQuery("SELECT * FROM table WHERE something = ?", [ $something ]);
while($row = $statement->fetch()) {
    // ...
}

// Or writing to the database
$db->runQuery("INSERT INTO table (name) VALUES (?)", [ $name ]);
$db->runQuery("UPDATE table SET name = ? WHERE id = ?", [ $name, $id ]);

fetchField(string $sql, array $params = []): mixed

Pulls the first field from the query

$db = Flight::db();
$count = $db->fetchField("SELECT COUNT(*) FROM table WHERE something = ?", [ $something ]);

fetchRow(string $sql, array $params = []): array

Pulls one row from the query

$db = Flight::db();
$row = $db->fetchRow("SELECT * FROM table WHERE id = ?", [ $id ]);

fetchAll(string $sql, array $params = []): array

Pulls all rows from the query

$db = Flight::db();
$rows = $db->fetchAll("SELECT * FROM table WHERE something = ?", [ $something ]);
foreach($rows as $row) {
    // do something
}

Note with IN() syntax

This also has a helpful wrapper for IN() statements. You can simply pass a single question mark as a placeholder for IN() and then an array of values. Here is an example of what that might look like:

$db = Flight::db();
$name = 'Bob';
$company_ids = [1,2,3,4,5];
$rows = $db->fetchAll("SELECT * FROM table WHERE name = ? AND company_id IN (?)", [ $name, $company_ids ]);

Full Example

// Example route and how you would use this wrapper
Flight::route('/users', function () {
    // Get all users
    $users = Flight::db()->fetchAll('SELECT * FROM users');

    // Stream all users
    $statement = Flight::db()->runQuery('SELECT * FROM users');
    while ($user = $statement->fetch()) {
        echo $user['name'];
    }

    // Get a single user
    $user = Flight::db()->fetchRow('SELECT * FROM users WHERE id = ?', [123]);

    // Get a single value
    $count = Flight::db()->fetchField('SELECT COUNT(*) FROM users');

    // Special IN() syntax to help out (make sure IN is in caps)
    $users = Flight::db()->fetchAll('SELECT * FROM users WHERE id IN (?)', [[1,2,3,4,5]]);
    // you could also do this
    $users = Flight::db()->fetchAll('SELECT * FROM users WHERE id IN (?)', [ '1,2,3,4,5']);

    // Insert a new user
    Flight::db()->runQuery("INSERT INTO users (name, email) VALUES (?, ?)", ['Bob', 'bob@example.com']);
    $insert_id = Flight::db()->lastInsertId();

    // Update a user
    Flight::db()->runQuery("UPDATE users SET name = ? WHERE id = ?", ['Bob', 123]);

    // Delete a user
    Flight::db()->runQuery("DELETE FROM users WHERE id = ?", [123]);

    // Get the number of affected rows
    $statement = Flight::db()->runQuery("UPDATE users SET name = ? WHERE name = ?", ['Bob', 'Sally']);
    $affected_rows = $statement->rowCount();

});