PHP pdo exception "could not find driver" pgsql

Question

So i always get a pdo exception when i try to create my db in the constructor of my Mapper class. on this line:

$this->db = new PDO($dsn, $db_config['username'], $db_config['password']);

this is my dsn creation:

    $db_config = array(
    'driver' => 'pgsql',
    'username' => $dbUser,
    'password' => $dbPassword,
    'schema' => 'r0628740',
    'dsn' => array(
        'host' => 'gegevensbanken.khleuven.be',
        'dbname' => '2TX31',
        'port' => '51314',
    )
);

and finaly my constructor:

public function __construct(){
        global $db_config;
        $dsn = $db_config['driver'] . ':';
        foreach($db_config['dsn'] as $key => $value){
            $dsn .= $key . '=' . $value . ';';
        }
        try{

            $this->db = new PDO($dsn, $db_config['username'], $db_config['password']);
            $this->db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

            if(($db_config['driver'] == 'pgsql') && isset($db_config['schema'])){
                $this->db->query(sprintf("SET SEARCH_PATH TO %s"), $db_config['schema']);
            }
        }catch (PDOException $e){
            var_dump($e->getLine());
            error_log($e->getMessage());
        }

    }

Answer 1

The PHP contains a dll required by pgsql and pgsql_pdo driver libpq.dll... Add PHP binary path to system path or copy de DLL into Windows\\system32. On linux dependency are installed automatically.

Answer 2

I found article somewhere, works for me. Assuming you have installed PostgreSQL and your WAMP installation is on c:\\wamp , you will need to copy:

c:\\wamp\\bin\\php\\php5.3.9\\libpq.dll to c:\\wamp\\bin\\apache\\Apache2.2.11\\bin .

Make sure you also have the following files:

C:\\wamp\\bin\\php\\php5.3.9\\ext\\php_pdo_pgsql.dll and C:\\wamp\\bin\\php\\php5.3.9\\ext\\php_pgsql.dll

Also, make sure you have enabled the above 2 files as extensions, either via the WAMP menu (click on WAMP icon on taskbar: PHP > PHP extensions , find the above 2 and 'check' them).

Please note that php5.3.9 and Apache2.2.11 refer to my specific PHP and Apache versions.

Adjust those to suit your installation.

Answer 3

Copying this libpq.dll from c:\\wamp\\bin\\php\\php5.3.9\\libpq.dll to c:\\wamp\\bin\\apache\\Apache2.2.11\\bin . has worked for me