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<?php
class Database
{
private static $dbh = false;
private static $statements = array();
public static function init()
{
if (self::$dbh !== false) return;
try {
self::$dbh = new PDO(CONFIG_SQL_DSN, CONFIG_SQL_USER, CONFIG_SQL_PASS, array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8"));
} catch (PDOException $e) {
Util::traceError('Connecting to the local database failed: ' . $e->getMessage());
}
}
public static function queryFirst($query, $args = array())
{
$res = self::simpleQuery($query, $args);
if ($res === false) return false;
return $res->fetch(PDO::FETCH_ASSOC);
}
public static function exec($query, $args = array())
{
$res = self::simpleQuery($query, $args);
if ($res === false) return false;
return $res->rowCount();
}
public static function simpleQuery($query, $args = array())
{
self::init();
//if (empty($args)) Util::traceError('Query with zero arguments!');
if (!isset(self::$statements[$query])) {
self::$statements[$query] = self::$dbh->prepare($query);
} else {
self::$statements[$query]->closeCursor();
}
if (self::$statements[$query]->execute($args) === false) {
Util::traceError("Database Error: \n" . implode("\n", self::$statements[$query]->errorInfo()));
}
return self::$statements[$query];
}
public static function prepare($query)
{
self:init();
return self::$dbh->prepare($query);
}
}
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