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413
inc/classes/db/mysqli/MsdDbMysqli.php
Normale Datei
413
inc/classes/db/mysqli/MsdDbMysqli.php
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<?php
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/**
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* This file is part of MySQLDumper released under the GNU/GPL 2 license
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* http://www.mysqldumper.net
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*
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* @package MySQLDumper
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* @subpackage MsdDbFactory
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* @version SVN: $rev: 1208 $
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* @author $Author$
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* @lastmodified $Date$
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*/
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/**
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* Capsules all database related actions.
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* Uses some magic getters to allow lazy connecting.
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*
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*/
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class MsdDbMysqli extends MsdDbFactory
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{
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/**
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* @var resource
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*/
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private $_mysqli = null;
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/**
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* Get known charsets of MySQL-Server
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*
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* @return array
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*/
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public function getCharsets()
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{
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if (isset($this->charsets)) return $this->charsets;
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if (!$this->_mysqli instanceof mysqli) $this->dbConnect();
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$result = $this->query('SHOW CHARACTER SET', self::ARRAY_ASSOC);
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$this->charsets = array();
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foreach ($result as $r) {
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$this->charsets[$r['Charset']] = $r;
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}
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@ksort($this->charsets);
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return $this->charsets;
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}
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/**
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* Establish a connection to MySQL.
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*
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* Create a connection to MySQL and store the connection handle in
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* $this->connectionHandle.
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* If $select_database is set, the database is selected for further queries.
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* Returns true on success or false if connection couldn't be established.
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*
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* @param string $select_database
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* @param string $connectionCharset
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* @return boolean
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**/
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public function dbConnect($selectDatabase = false)
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{
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if ($this->_mysqli instanceof mysqli) {
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return true;
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}
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$this->_mysqli = @new mysqli(
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$this->server,
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$this->user,
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$this->password,
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$this->dbSelected,
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$this->port,
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$this->socket
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);
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if ($this->_mysqli->connect_errno) {
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$error = $this->_mysqli->connect_error;
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$errno = $this->_mysqli->connect_errno;
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$this->_mysqli = null;
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return '(' . $errno . ') ' . $error;
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}
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$this->setConnectionCharset($this->connectionCharset);
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if (false === $selectDatabase && $this->dbSelected > '') {
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$selectDatabase = $this->dbSelected;
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}
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if ($selectDatabase) {
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if ($this->selectDb($selectDatabase)) {
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$this->dbSelected = $selectDatabase;
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return true;
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} else {
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$this->sqlError(mysqli_error(mysqli_error(), mysqli_errno()));
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}
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}
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return true;
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}
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/**
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* Get version nr of sql server
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*
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* @return string
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*/
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public function getServerInfo()
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{
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if (!$this->_mysqli instanceof mysqli) {
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$this->dbConnect();
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}
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return $this->_mysqli->server_info;
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}
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/**
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* Get version nr of sql client
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*
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* @return string
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*/
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public function getClientInfo()
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{
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if (!$this->_mysqli instanceof mysqli) $this->dbConnect();
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return $this->_mysqli->client_info;
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}
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/**
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* Set character set of the MySQL-connection.
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*
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* Trys to set the connection charset and returns it.
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* Throw Exception on failure.
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*
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* @param string $charset
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* @throws Exception
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*
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* @return string
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*/
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public function setConnectionCharset($charset = 'utf8')
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{
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if (!$this->_mysqli instanceof mysqli) {
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$this->dbConnect();
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}
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if (!@$this->_mysqli->set_charset($charset)) {
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$this->sqlError(
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$charset . ' ' . $this->_mysqli->error,
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$this->_mysqli->errno
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);
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}
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$this->connectionCharset = $this->_mysqli->character_set_name();
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return $this->connectionCharset;
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}
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/**
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* Get list of databases
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*
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* Gets list of all databases that the actual MySQL-User has access to
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* and saves it in $this->databases.
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* Returns true on success or false on error.
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*
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* @return boolean
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*/
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public function getDatabases()
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{
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if (!$this->_mysqli instanceof mysqli) $this->dbConnect();
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$res = $this->query('SHOW DATABASES', self::ARRAY_ASSOC);
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$this->databases = array();
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foreach ($res as $r) {
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$this->databases[] = $r['Database'];
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}
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sort($this->databases);
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return $this->databases;
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}
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/**
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* Select the given database to use it as the target for following queries.
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*
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* Returns true if selection was succesfull otherwise false.
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*
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* @throws Exception
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* @param string $database Database to select
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*
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* @return boolean
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*/
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public function selectDb($database)
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{
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if (!$this->_mysqli instanceof mysqli) {
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$this->dbConnect();
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}
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$res=@$this->_mysqli->select_db($database);
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if ($res===false) {
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return $this->_mysqli->error;
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} else {
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$this->dbSelected = $database;
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return true;
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}
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}
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/**
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* Get selected database
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*
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* @see inc/classes/db/MsdDbFactory#getSelectedDb()
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* @return string
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*/
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public function getSelectedDb()
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{
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return $this->dbSelected;
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}
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/**
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* Execute a MySQL-Query
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*
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* @throws Exception
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* @param string $query The query to execute
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* @param const $kind Type of result set
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*
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* @return array
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*/
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public function query($query, $kind = self::ARRAY_OBJECT)
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{
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if (!$this->_mysqli instanceof mysqli) {
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$this->dbConnect($this->dbSelected);
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}
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//echo "<br>Mysqli: executing query: " . $query;
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$result = $this->_mysqli->query($query);
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if (false === $result) {
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$this->sqlError($this->_mysqli->error, $this->_mysqli->errno);
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}
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if (!$result instanceof mysqli_result || $kind === self::SIMPLE) {
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return $result;
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}
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$ret = array();
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if ($kind === self::ARRAY_OBJECT) {
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WHILE ($row = $result->fetch_object()) {
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$ret[] = $row;
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}
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} elseif ($kind === self::ARRAY_NUMERIC) {
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WHILE ($row = $result->fetch_array(MYSQLI_NUM)) {
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$ret[] = $row;
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}
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} elseif ($kind === self::ARRAY_ASSOC) {
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WHILE ($row = $result->fetch_assoc()) {
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$ret[] = $row;
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}
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}
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if ($result instanceof mysqli) {
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$result->close();
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}
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return $ret;
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}
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/**
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* Get table list of given database(s)
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*
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* Stores them in $this->tables[database]
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* When no database is given, all databases are scanned for tables.
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* Returns table list for selected or for all databases.
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*
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* @param string|array $database
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* @return array
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*/
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public function getTables($database = false)
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{
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if (!$this->_mysqli instanceof mysqli) {
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$this->dbConnect($this->dbSelected);
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}
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if (!isset($this->tables)) {
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$this->tables = array();
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}
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if ($database !== false) {
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//only list tables of selected database
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if (is_array($database)) {
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$databases = $database;
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} else {
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$databases = array();
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$databases[0] = $database;
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}
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} else {
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//list tables for all databases
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$databases = $this->databases;
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}
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// get tablenames for each database
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foreach ($databases as $db) {
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$this->tables[$db] = array();
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$sql = 'SHOW TABLES FROM `' . $db . '`';
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$res = $this->query($sql, self::ARRAY_NUMERIC);
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foreach ($res as $val) {
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$this->tables[$db][] = $val[0];
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}
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}
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return is_string($database) ? $this->tables[$database] : $this->tables;
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}
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/**
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* Gets extended table information for one or all tables
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*
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* @param string $table
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* @param string $database
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* @return array
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*/
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public function getTableStatus($table = false, $database = false)
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{
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if ($database !== false && $database != $this->dbSelected) {
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$this->selectDb($database);
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}
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if (!$this->_mysqli instanceof mysqli) {
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$this->selectDb($this->dbSelected);
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}
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if (!isset($this->tableinfo)) {
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$this->tableinfo = array();
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}
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if (!isset($this->tableinfo[$this->dbSelected])) {
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$this->tableinfo[$this->dbSelected] = array();
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}
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$sql = 'SHOW TABLE STATUS';
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if ($table !== false) {
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$sql .= ' LIKE \'' . $table . '\'';
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}
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$res = $this->query($sql, self::ARRAY_ASSOC);
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if (is_array($res)) {
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foreach ($res as $r) {
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$tablename = $r['Name'];
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unset($r['Name']);
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$this->tableinfo[$this->dbSelected][$tablename] = $r;
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}
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} elseif ($res === false) {
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$this->sqlError($this->_mysqli->error, $this->_mysqli->errno);
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}
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if ($table !== false) {
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if (isset($this->tableinfo[$this->dbSelected][$table])) {
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return $this->tableinfo[$this->dbSelected][$table];
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}
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}
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return $this->tableinfo[$this->dbSelected];
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}
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/**
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* Returns the CREATE Statement of a table.
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*
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* @throws Exception
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* @param string $table
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* @param string $database
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*
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* @return string
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*/
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public function getTableCreate($table, $database = false)
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{
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if (false === $database) {
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$database = $this->dbSelected;
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}
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if ($database != $this->dbSelected) {
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if (false === $this->selectDB($database)) {
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$this->sqlError($this->_mysqli->error, $this->_mysqli->errno);
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}
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}
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if (!$this->_mysqli instanceof mysqli) {
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$this->dbConnect($this->dbSelected);
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}
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$sql = 'SHOW CREATE TABLE `' . $table . '`';
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$res = $this->query($sql, self::ARRAY_ASSOC);
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if (isset($res[0]['Create Table'])) {
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return $res[0]['Create Table'];
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} else {
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$this->sqlError($this->_mysqli->error, $this->_mysqli->errno);
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}
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}
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/**
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* Gets the full description of all columns of a table
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*
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* Saves it to $this->metaTables[$database][$table].
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*
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* @param string $table
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* @param string $database
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*
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* @return array
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*/
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public function getTableColumns($table, $database = false)
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{
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if (!$this->_mysqli instanceof mysqli) {
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$this->dbConnect($this->dbSelected);
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}
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if (false === $database) {
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$database = $this->dbSelected;
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}
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if ($database != $this->dbSelected) {
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if (false === $this->selectDB($database)) {
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$this->sqlError($this->_mysqli->error, $this->_mysqli->errno);
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}
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}
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$sql = 'SHOW FULL FIELDS FROM `' . $table . '`';
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$res = $this->query($sql, self::ARRAY_ASSOC);
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if (!isset($this->metaTables[$database])) $this->metaTables[$database] = array();
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if (is_array($res)) {
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$this->metaTables[$database][$table] = array();
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foreach ($res as $r) {
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$this->metaTables[$database][$table][$r['Field']] = $r;
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}
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}
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return $this->metaTables[$database][$table];
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}
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/**
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* Gets the number of affected rows for the last query
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*
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* @see inc/classes/db/MsdDbFactory#affectedRows()
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* @return integer
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*/
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public function getAffectedRows()
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{
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return $this->_mysqli->affected_rows;
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}
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/**
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* Escape a value to use it in a query
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*
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* @see inc/classes/db/MsdDbFactory#escape($val)
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* @param mixed $val The value to escape
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*
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* @return mixed
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*/
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public function escape($val)
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{
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return $this->_mysqli->real_escape_string($val);
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}
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/**
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* Optimize a table. Returns true on success or MySQL-Error.
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*
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* @param string $table Name of table
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*
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* @return boolean or string true on success or mysql_error() on failure
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*/
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function optimizeTable($table)
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{
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$sql = 'OPTIMIZE TABLE `' . $this->dbSelected . '`.`' . $table . '`';
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$res = $this->query($sql, MsdDbFactory::ARRAY_ASSOC);
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if (isset($res[0]['Msg_text'])) {
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return $res[0];
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} else {
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return false;
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}
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}
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}
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