php SQLite 3不起作用[关闭]

In this code :

echo "plop";
$bdd = new SQLite3("databaseSQLite.db") or die('Unable to open database');
echo "plop";

only the first "plop" appear, I am using PHP 5.4.44. How can I make SQLite3 work?

PDO doesn't work either.

$bdd = new PDO('sqlite:database.sql');

Thanks Ryan Vincent, displaying errors shows me SQLite wasn't installed, (thinked it was always installed with php >= 5.3). apt-get install php5-sqlite fix it.