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<?php
/**
* Akeeba Engine
* The modular PHP5 site backup engine
* @copyright Copyright (c)2009-2012 Nicholas K. Dionysopoulos
* @license GNU GPL version 3 or, at your option, any later version
* @package akeebaengine
* @version $Id: mysqli.php 409 2011-01-24 09:30:22Z nikosdion $
*/
// Protection against direct access
defined('AKEEBAENGINE') or die('Restricted access');
/**
* MySQL Improved (mysqli) database driver for Akeeba Engine
*/
class AEDriverMysqli extends AEAbstractDriver
{
/**
* Database object constructor
* @param array List of options used to configure the connection
*/
public function __construct( $options )
{
// Init
$this->nameQuote = '`';
$host = array_key_exists('host', $options) ? $options['host'] : 'localhost';
$port = array_key_exists('port', $options) ? $options['port'] : '';
$user = array_key_exists('user', $options) ? $options['user'] : '';
$password = array_key_exists('password',$options) ? $options['password'] : '';
$database = array_key_exists('database',$options) ? $options['database'] : '';
$prefix = array_key_exists('prefix', $options) ? $options['prefix'] : '';
$select = array_key_exists('select', $options) ? $options['select'] : true;
// Figure out if a port is included in the host name
if(empty($port))
{
// Unlike mysql_connect(), mysqli_connect() takes the port and socket
// as separate arguments. Therefore, we have to extract them from the
// host string.
$port = NULL;
$socket = NULL;
$targetSlot = substr( strstr( $host, ":" ), 1 );
if (!empty( $targetSlot )) {
// Get the port number or socket name
if (is_numeric( $targetSlot ))
$port = $targetSlot;
else
$socket = $targetSlot;
// Extract the host name only
$host = substr( $host, 0, strlen( $host ) - (strlen( $targetSlot ) + 1) );
// This will take care of the following notation: ":3306"
if($host == '')
$host = 'localhost';
}
}
// finalize initialization
parent::__construct($options);
// Open the connection
$this->host = $host;
$this->user = $user;
$this->password = $password;
$this->port = $port;
$this->socket = $socket;
$this->database = $database;
$this->open();
}
public function open()
{
// perform a number of fatality checks, then return gracefully
if (!function_exists( 'mysqli_connect' )) {
$this->errorNum = 1;
$this->errorMsg = 'The MySQL adapter "mysqli" is not available.';
return;
}
// connect to the server
if (!($this->resource = @mysqli_connect($this->host, $this->user, $this->password, NULL, $this->port, $this->socket))) {
$this->errorNum = 2;
$this->errorMsg = 'Could not connect to MySQL';
return;
}
parent::open();
$this->select($this->database);
}
public function close()
{
$return = false;
if (is_resource($this->cursor)) {
mysqli_free_result($this->cursor);
}
if (is_resource($this->resource)) {
$return = mysqli_close($this->resource);
}
$this->resource = null;
return $return;
}
/**
* Select a database for use
* @param string $database
* @return boolean True if the database has been successfully selected
*/
public function select($database)
{
if ( ! $database )
{
return false;
}
if ( !mysqli_select_db($this->resource, $database)) {
$this->errorNum = 3;
$this->errorMsg = 'Could not connect to database';
return false;
}
$verParts = explode( '.', $this->getVersion() );
if ( $verParts[0] == 5 ) {
$this->setQuery( "SET sql_mode = 'HIGH_NOT_PRECEDENCE'" );
$this->query();
$this->resetErrors();
}
return true;
}
/**
* Determines UTF support
* @return bool
*/
public function hasUTF()
{
$verParts = explode( '.', $this->getVersion() );
return ($verParts[0] == 5 || ($verParts[0] == 4 && $verParts[1] == 1 && (int)$verParts[2] >= 2));
}
/**
* Custom settings for UTF support
*/
public function setUTF()
{
mysqli_query( $this->resource, "SET NAMES 'utf8'" );
}
/**
* Get a database escaped string
* @param string The string to be escaped
* @param bool Optional parameter to provide extra escaping
* @return string
*/
public function getEscaped( $text, $extra = false )
{
$result = @mysqli_real_escape_string( $this->resource, $text );
if ($extra) {
$result = addcslashes( $result, '%_' );
}
return $result;
}
/**
* Execute the query
* @return mixed A database resource if successful, FALSE if not.
*/
public function query()
{
if (!is_object($this->resource)) {
return false;
}
if(is_object($this->cursor)) @mysqli_free_result($this->cursor);
// Take a local copy so that we don't modify the original query and cause issues later
$sql = $this->sql;
if ($this->limit > 0 || $this->offset > 0) {
$sql .= ' LIMIT '.$this->offset.', '.$this->limit;
}
$this->errorNum = 0;
$this->errorMsg = '';
$this->cursor = mysqli_query( $this->resource, $sql, MYSQLI_USE_RESULT );
if (!$this->cursor)
{
$this->errorNum = mysqli_errno( $this->resource );
$this->errorMsg = mysqli_error( $this->resource )." SQL=$sql";
return false;
}
return $this->cursor;
}
/**
* This method loads the first field of the first row returned by the query.
* @return mixed The value returned in the query or null if the query failed.
*/
public function loadResult()
{
if (!($cur = $this->query())) {
return null;
}
$ret = null;
if ($row = mysqli_fetch_row( $cur )) {
$ret = $row[0];
}
mysqli_free_result( $cur );
return $ret;
}
/**
* Load an array of single field results into an array
* @return mixed An array, or null if query failed
*/
public function loadResultArray($numinarray = 0)
{
if (!($cur = $this->query())) {
return null;
}
$array = array();
while ($row = mysqli_fetch_row( $cur )) {
$array[] = $row[$numinarray];
}
mysqli_free_result( $cur );
return $array;
}
/**
* Fetch a result row as an associative array
* @param bool $free_cursor If true, frees the cursor after returning the result
* @return array An associative array, null if query failed or false on end of data
*/
public function loadAssoc($free_cursor = false)
{
if( !is_resource($this->cursor) && !is_object($this->cursor) )
{
if (!($this->cursor = $this->query())) {
return null;
}
}
$ret = null;
if ($array = mysqli_fetch_assoc( $this->cursor )) {
$ret = $array;
}
else
{
$ret = false;
$free_cursor = true;
}
if( $free_cursor ) {
mysqli_free_result( $this->cursor );
}
return $ret;
}
/**
* Load a associactive list of database rows
* @param string The field name of a primary key
* @return array If key is empty as sequential list of returned records.
*/
public function loadAssocList( $key=null )
{
if (!($cur = $this->query())) {
return null;
}
$array = array();
while ($row = mysqli_fetch_assoc( $cur )) {
if ($key) {
$array[$row[$key]] = $row;
} else {
$array[] = $row;
}
}
mysqli_free_result( $cur );
return $array;
}
/**
* Load a list of database rows (numeric column indexing)
* If <var>key</var> is not empty then the returned array is indexed by the value
* the database key. Returns <var>null</var> if the query fails.
* @param string The field name of a primary key
* @return array
*/
public function loadRowList( $key=null )
{
if (!($cur = $this->query())) {
return null;
}
$array = array();
while ($row = mysqli_fetch_row( $cur )) {
if ($key !== null) {
$array[$row[$key]] = $row;
} else {
$array[] = $row;
}
}
mysqli_free_result( $cur );
return $array;
}
/**
* Get the version of the database connector
* @return string The database server's version number
*/
public function getVersion()
{
return mysqli_get_server_info( $this->resource );
}
/**
* Returns the last INSERT auto_increase column's value
* @return int
*/
public function insertid()
{
return mysqli_insert_id( $this->resource );
}
}