silverstripe-framework/dev/install/MySQLDatabaseConfigurationHelper.php

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<?php
/**
* This is a helper class for the SS installer.
*
* It does all the specific checking for MySQLDatabase
* to ensure that the configuration is setup correctly.
*
* @package sappire
* @subpackage model
*/
class MySQLDatabaseConfigurationHelper implements DatabaseConfigurationHelper {
/**
* Ensure that the database function for connectivity is available.
* If it is, we assume the PHP module for this database has been setup correctly.
*
* @param array $databaseConfig Associative array of db configuration, e.g. "server", "username" etc
* @return boolean
*/
public function requireDatabaseFunctions($databaseConfig) {
return (function_exists('mysql_connect')) ? true : false;
}
/**
* Ensure that the database server exists.
* @param array $databaseConfig Associative array of db configuration, e.g. "server", "username" etc
* @return array Result - e.g. array('success' => true, 'error' => 'details of error')
*/
public function requireDatabaseServer($databaseConfig) {
$success = false;
$error = '';
$conn = @mysql_connect($databaseConfig['server'], null, null);
if($conn || mysql_errno() < 2000) {
$success = true;
} else {
$success = false;
$error = mysql_error();
}
return array(
'success' => $success,
'error' => $error
);
}
/**
* Get the database version for the MySQL connection, given the
* database parameters.
* @return mixed string Version number as string | boolean FALSE on failure
*/
public function getDatabaseVersion($databaseConfig) {
$conn = @mysql_connect($databaseConfig['server'], $databaseConfig['username'], $databaseConfig['password']);
if(!$conn) return false;
$version = @mysql_get_server_info($conn);
if(!$version) {
// fallback to trying a query
$result = @mysql_query("SELECT VERSION()");
$row = @mysql_fetch_array($result);
if($row && isset($row[0])) {
$version = trim($row[0]);
}
}
return $version;
}
/**
* Ensure that the MySQL server version is at least 5.0.
* @param array $databaseConfig Associative array of db configuration, e.g. "server", "username" etc
* @return array Result - e.g. array('success' => true, 'error' => 'details of error')
*/
public function requireDatabaseVersion($databaseConfig) {
$version = $this->getDatabaseVersion($databaseConfig);
$success = false;
$error = '';
if($version) {
$success = version_compare($version, '5.0', '>=');
if(!$success) {
$error = "Your MySQL server version is $version. It's recommended you use at least MySQL 5.0.";
}
} else {
$error = "Could not determine your MySQL version.";
}
return array(
'success' => $success,
'error' => $error
);
}
/**
* Ensure a database connection is possible using credentials provided.
* @param array $databaseConfig Associative array of db configuration, e.g. "server", "username" etc
* @return array Result - e.g. array('success' => true, 'error' => 'details of error')
*/
public function requireDatabaseConnection($databaseConfig) {
$success = false;
$error = '';
$conn = @mysql_connect($databaseConfig['server'], $databaseConfig['username'], $databaseConfig['password']);
if($conn) {
$success = true;
} else {
$success = false;
$error = mysql_error();
}
return array(
'success' => $success,
'error' => $error
);
}
/**
* Ensure that the database connection is able to use an existing database,
* or be able to create one if it doesn't exist.
*
* @param array $databaseConfig Associative array of db configuration, e.g. "server", "username" etc
* @return array Result - e.g. array('success' => true, 'alreadyExists' => 'true')
*/
public function requireDatabaseOrCreatePermissions($databaseConfig) {
$success = false;
$alreadyExists = false;
$conn = @mysql_connect($databaseConfig['server'], $databaseConfig['username'], $databaseConfig['password']);
if(@mysql_select_db($databaseConfig['database'], $conn)) {
$success = true;
$alreadyExists = true;
} else {
if(@mysql_query("CREATE DATABASE testing123", $conn)) {
mysql_query("DROP DATABASE testing123", $conn);
$success = true;
$alreadyExists = false;
}
}
return array(
'success' => $success,
'alreadyExists' => $alreadyExists
);
}
}