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<?php
namespace PicoDb;
class Mysql extends \PDO {
private $schema_table = 'schema_version';
public function __construct(array $settings)
{
$required_atttributes = array(
'hostname',
'username',
'password',
'database',
'charset',
);
foreach ($required_atttributes as $attribute) {
if (! isset($settings[$attribute])) {
throw new \LogicException('This configuration parameter is missing: "'.$attribute.'"');
}
}
$dsn = 'mysql:host='.$settings['hostname'].';dbname='.$settings['database'];
$options = array(
\PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES '.$settings['charset']
);
parent::__construct($dsn, $settings['username'], $settings['password'], $options);
if (isset($settings['schema_table'])) {
$this->schema_table = $settings['schema_table'];
}
}
public function getSchemaVersion()
{
$this->exec("CREATE TABLE IF NOT EXISTS `".$this->schema_table."` (`version` INT DEFAULT '0')");
$rq = $this->prepare('SELECT `version` FROM `'.$this->schema_table.'`');
$rq->execute();
$result = $rq->fetch(\PDO::FETCH_ASSOC);
if (isset($result['version'])) {
return (int) $result['version'];
}
else {
$this->exec('INSERT INTO `'.$this->schema_table.'` VALUES(0)');
}
return 0;
}
public function setSchemaVersion($version)
{
$rq = $this->prepare('UPDATE `'.$this->schema_table.'` SET `version`=?');
$rq->execute(array($version));
}
public function getLastId()
{
return $this->lastInsertId();
}
public function escapeIdentifier($value)
{
if (strpos($value, '.') !== false) return $value;
return '`'.$value.'`';
}
}
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