gistfile1.php

<?php
        $db = new PDO('sqlite:ai.db');
        $db->exec('
            CREATE TABLE IF NOT EXISTS
                phrases
            (
                `word` INTEGER,
                `left` INTEGER,
                `right` INTEGER,
                PRIMARY KEY (`word`, `left`, `right`)
            );
        ');
        $db->exec('
            CREATE TABLE IF NOT EXISTS
                words
            (
                `id` INTEGER PRIMARY KEY ASC,
                `word` VARCHAR(45) NOT NULL
            );
        ');