54 lines
1.5 KiB
PHP
54 lines
1.5 KiB
PHP
<?php
|
|
// Data base configuration and a bit more
|
|
require_once ('config.php');
|
|
|
|
define ('DB_CONFIG_TABLE', TAB_PREFIX . 'config');
|
|
|
|
class DbUtils {
|
|
/**
|
|
* Open a PDO connection to the database based on the config.php file that
|
|
* is written during the installation
|
|
*
|
|
* @return NULL|PDO: null if no connection could be established, otherwise the PDO instance
|
|
*/
|
|
public static function openDbAndReturnPdo() {
|
|
$dsn = 'mysql:host=' . MYSQL_HOST . ';dbname=' . MYSQL_DB;
|
|
$user = MYSQL_USER;
|
|
$password = MYSQL_PASSWORD;
|
|
$pdo = null;
|
|
try {
|
|
$pdo = new PDO($dsn, $user, $password);
|
|
$pdo ->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
|
|
}
|
|
catch (PDOException $e) {
|
|
return null;
|
|
}
|
|
return $pdo;
|
|
}
|
|
|
|
/*
|
|
* To use sql strings that are easy to read the table names are used
|
|
* without variables. But since the user can specify a prefix for all
|
|
* tables the substitution must be done somewhere. This is the function
|
|
* that replaces the %TABLE% by $prefix_table
|
|
*/
|
|
public static function substTableAlias($sqlString) {
|
|
return self::substTableAliasWithPrefix($sqlString, TAB_PREFIX);
|
|
}
|
|
|
|
/**
|
|
* Like substTableAlias, but can be used with a defined prefix
|
|
*
|
|
* @param unknown $sqlString
|
|
* @param unknown $prefix
|
|
* @return mixed
|
|
*/
|
|
public static function substTableAliasWithPrefix($sqlString,$prefix) {
|
|
$out = $sqlString;
|
|
$out = str_replace("%config%",$prefix . "config",$out);
|
|
$out = str_replace("%clients%",$prefix . "clients",$out);
|
|
|
|
return ($out);
|
|
}
|
|
}
|
|
?>
|