File: /var/www/Gosurya/WP2/wp-content/plugins/akeebabackupwp/app/Awf/Database/Driver/Mysqli.php
<?php
/**
* @package awf
* @copyright Copyright (c)2014-2021 Nicholas K. Dionysopoulos / Akeeba Ltd
* @license GNU GPL version 3 or later
*/
namespace Awf\Database\Driver;
use Awf\Database\Driver;
use Awf\Database\Query;
/**
* MySQLi database driver
*
* This class is adapted from the Joomla! Framework
*
* @see http://php.net/manual/en/book.mysqli.php
*/
class Mysqli extends Driver
{
/**
* The name of the database driver.
*
* @var string
*/
public $name = 'mysqli';
/**
* @var string The database technology family supported, e.g. mysql, mssql
*/
public static $dbtech = 'mysql';
/**
* The character(s) used to quote SQL statement names such as table names or field names,
* etc. The child classes should define this as necessary. If a single character string the
* same character is used for both sides of the quoted name, else the first character will be
* used for the opening quote and the second for the closing quote.
*
* @var string
*/
protected $nameQuote = '`';
/**
* The null or zero representation of a timestamp for the database driver. This should be
* defined in child classes to hold the appropriate value for the engine.
*
* @var string
*/
protected $nullDate = '0000-00-00 00:00:00';
/**
* @var string The minimum supported database version.
*/
protected static $dbMinimum = '5.0.4';
/**
* Constructor.
*
* @param array $options List of options used to configure the connection
*
*/
public function __construct($options)
{
// Get some basic values from the options.
$options['host'] = (isset($options['host'])) ? $options['host'] : 'localhost';
$options['user'] = (isset($options['user'])) ? $options['user'] : 'root';
$options['password'] = (isset($options['password'])) ? $options['password'] : '';
$options['database'] = (isset($options['database'])) ? $options['database'] : '';
$options['select'] = (isset($options['select'])) ? (bool) $options['select'] : true;
$options['port'] = null;
$options['socket'] = null;
// Finalize initialisation.
parent::__construct($options);
}
/**
* Destructor.
*
*/
public function __destruct()
{
if (is_callable($this->connection, 'close'))
{
mysqli_close($this->connection);
}
}
/**
* Connects to the database if needed.
*
* @return void Returns void if the database connected successfully.
*
* @throws \RuntimeException
*/
public function connect()
{
if ($this->connection)
{
return;
}
/*
* Unlike mysql_connect(), mysqli_connect() takes the port and socket as separate arguments. Therefore, we
* have to extract them from the host string.
*/
$tmp = substr(strstr($this->options['host'], ':'), 1);
if (!empty($tmp))
{
// Get the port number or socket name
if (is_numeric($tmp))
{
$this->options['port'] = $tmp;
}
else
{
$this->options['socket'] = $tmp;
}
// Extract the host name only
$this->options['host'] = substr($this->options['host'], 0, strlen($this->options['host']) - (strlen($tmp) + 1));
// This will take care of the following notation: ":3306"
if ($this->options['host'] == '')
{
$this->options['host'] = 'localhost';
}
}
// Make sure the MySQLi extension for PHP is installed and enabled.
if (!function_exists('mysqli_connect'))
{
throw new \RuntimeException('The MySQL adapter mysqli is not available');
}
$this->connection = @mysqli_connect(
$this->options['host'], $this->options['user'], $this->options['password'], null, $this->options['port'], $this->options['socket']
);
// Attempt to connect to the server.
if (!$this->connection)
{
throw new \RuntimeException('Could not connect to MySQL.');
}
// Set sql_mode to non_strict mode
mysqli_query($this->connection, "SET @@SESSION.sql_mode = '';");
// If auto-select is enabled select the given database.
if ($this->options['select'] && !empty($this->options['database']))
{
$this->select($this->options['database']);
}
// Set charactersets (needed for MySQL 4.1.2+).
$this->setUTF();
}
/**
* Disconnects the database.
*
* @return void
*
*/
public function disconnect()
{
// Close the connection.
if (is_callable($this->connection, 'close'))
{
mysqli_close($this->connection);
}
$this->connection = null;
}
/**
* Method to escape a string for usage in an SQL statement.
*
* @param string $text The string to be escaped.
* @param boolean $extra Optional parameter to provide extra escaping.
*
* @return string The escaped string.
*
*/
public function escape($text, $extra = false)
{
$this->connect();
$result = mysqli_real_escape_string($this->getConnection(), $text);
if ($extra)
{
$result = addcslashes($result, '%_');
}
return $result;
}
/**
* Test to see if the MySQL connector is available.
*
* @return boolean True on success, false otherwise.
*
*/
public static function isSupported()
{
return (function_exists('mysqli_connect'));
}
/**
* Determines if the connection to the server is active.
*
* @return boolean True if connected to the database engine.
*
*/
public function connected()
{
if (is_object($this->connection))
{
return mysqli_ping($this->connection);
}
return false;
}
/**
* Drops a table from the database.
*
* @param string $tableName The name of the database table to drop.
* @param boolean $ifExists Optionally specify that the table must exist before it is dropped.
*
* @return Mysqli Returns this object to support chaining.
*
* @throws \RuntimeException
*/
public function dropTable($tableName, $ifExists = true)
{
$this->connect();
$query = $this->getQuery(true);
$this->setQuery('DROP TABLE ' . ($ifExists ? 'IF EXISTS ' : '') . $query->quoteName($tableName));
$this->execute();
return $this;
}
/**
* Get the number of affected rows for the previous executed SQL statement.
*
* @return integer The number of affected rows.
*
*/
public function getAffectedRows()
{
$this->connect();
return mysqli_affected_rows($this->connection);
}
/**
* Method to get the database collation in use by sampling a text field of a table in the database.
*
* @return mixed The collation in use by the database (string) or boolean false if not supported.
*
* @throws \RuntimeException
*/
public function getCollation()
{
$this->connect();
$tables = $this->getTableList();
$this->setQuery('SHOW FULL COLUMNS FROM ' . $tables[0]);
$array = $this->loadAssocList();
foreach ($array as $field)
{
if (!is_null($field['Collation']))
{
return $field['Collation'];
}
}
return null;
}
/**
* Get the number of returned rows for the previous executed SQL statement.
*
* @param resource $cursor An optional database cursor resource to extract the row count from.
*
* @return integer The number of returned rows.
*
*/
public function getNumRows($cursor = null)
{
return mysqli_num_rows($cursor ? $cursor : $this->cursor);
}
/**
* Shows the table CREATE statement that creates the given tables.
*
* @param mixed $tables A table name or a list of table names.
*
* @return array A list of the create SQL for the tables.
*
* @throws \RuntimeException
*/
public function getTableCreate($tables)
{
$this->connect();
$result = array();
// Sanitize input to an array and iterate over the list.
settype($tables, 'array');
foreach ($tables as $table)
{
// Set the query to get the table CREATE statement.
$this->setQuery('SHOW CREATE table ' . $this->quoteName($this->escape($table)));
$row = $this->loadRow();
// Populate the result array based on the create statements.
$result[$table] = $row[1];
}
return $result;
}
/**
* Retrieves field information about a given table.
*
* @param string $table The name of the database table.
* @param boolean $typeOnly True to only return field types.
*
* @return array An array of fields for the database table.
*
* @throws \RuntimeException
*/
public function getTableColumns($table, $typeOnly = true)
{
$this->connect();
$result = array();
// Set the query to get the table fields statement.
$this->setQuery('SHOW FULL COLUMNS FROM ' . $this->quoteName($this->escape($table)));
$fields = $this->loadObjectList();
// If we only want the type as the value add just that to the list.
if ($typeOnly)
{
foreach ($fields as $field)
{
$result[$field->Field] = preg_replace("/[(0-9)]/", '', $field->Type);
}
}
// If we want the whole field data object add that to the list.
else
{
foreach ($fields as $field)
{
$result[$field->Field] = $field;
}
}
return $result;
}
/**
* Get the details list of keys for a table.
*
* @param string $table The name of the table.
*
* @return array An array of the column specification for the table.
*
* @throws \RuntimeException
*/
public function getTableKeys($table)
{
$this->connect();
// Get the details columns information.
$this->setQuery('SHOW KEYS FROM ' . $this->quoteName($table));
$keys = $this->loadObjectList();
return $keys;
}
/**
* Method to get an array of all tables in the database.
*
* @return array An array of all the tables in the database.
*
* @throws \RuntimeException
*/
public function getTableList()
{
$this->connect();
// Set the query to get the tables statement.
$this->setQuery('SHOW TABLES');
$tables = $this->loadColumn();
return $tables;
}
/**
* Get the version of the database connector.
*
* @return string The database connector version.
*
*/
public function getVersion()
{
$this->connect();
return mysqli_get_server_info($this->connection);
}
/**
* Method to get the auto-incremented value from the last INSERT statement.
*
* @return integer The value of the auto-increment field from the last inserted row.
*
*/
public function insertid()
{
$this->connect();
return mysqli_insert_id($this->connection);
}
/**
* Locks a table in the database.
*
* @param string $table The name of the table to unlock.
*
* @return Mysqli Returns this object to support chaining.
*
* @throws \RuntimeException
*/
public function lockTable($table)
{
$this->setQuery('LOCK TABLES ' . $this->quoteName($table) . ' WRITE')->execute();
return $this;
}
/**
* Execute the SQL statement.
*
* @return mixed A database cursor resource on success, boolean false on failure.
*
* @throws \RuntimeException
*/
public function execute()
{
static $isReconnecting = false;
$this->connect();
if (!is_object($this->connection))
{
throw new \RuntimeException($this->errorMsg, $this->errorNum);
}
// Take a local copy so that we don't modify the original query and cause issues later
$sql = $this->replacePrefix((string) $this->sql);
if ($this->limit > 0 || $this->offset > 0)
{
$sql .= ' LIMIT ' . $this->offset . ', ' . $this->limit;
}
// Increment the query counter.
$this->count++;
// If debugging is enabled then let's log the query.
if ($this->debug)
{
// Add the query to the object queue.
$this->log[] = $sql;
}
// Reset the error values.
$this->errorNum = 0;
$this->errorMsg = '';
// Execute the query. Error suppression is used here to prevent warnings/notices that the connection has been lost.
$this->cursor = @mysqli_query($this->connection, $sql);
// If an error occurred handle it.
if (!$this->cursor)
{
$this->errorNum = (int) mysqli_errno($this->connection);
$this->errorMsg = (string) mysqli_error($this->connection) . ' SQL=' . $sql;
// Check if the server was disconnected.
if (!$this->connected() && !$isReconnecting)
{
$isReconnecting = true;
try
{
// Attempt to reconnect.
$this->connection = null;
$this->connect();
}
// If connect fails, ignore that exception and throw the normal exception.
catch (\RuntimeException $e)
{
throw new \RuntimeException($this->errorMsg, $this->errorNum);
}
$this->errorNum = null;
$this->errorMsg = null;
// Since we were able to reconnect, run the query again.
$result = $this->execute();
$isReconnecting = false;
return $result;
}
// The server was not disconnected.
else
{
throw new \RuntimeException($this->errorMsg, $this->errorNum);
}
}
unset($sql);
return $this->cursor;
}
/**
* Renames a table in the database.
*
* @param string $oldTable The name of the table to be renamed
* @param string $newTable The new name for the table.
* @param string $backup Not used by MySQL.
* @param string $prefix Not used by MySQL.
*
* @return Mysqli Returns this object to support chaining.
*
* @throws \RuntimeException
*/
public function renameTable($oldTable, $newTable, $backup = null, $prefix = null)
{
$this->setQuery('RENAME TABLE ' . $oldTable . ' TO ' . $newTable)->execute();
return $this;
}
/**
* Select a database for use.
*
* @param string $database The name of the database to select for use.
*
* @return boolean True if the database was successfully selected.
*
* @throws \RuntimeException
*/
public function select($database)
{
$this->connect();
if (!$database)
{
return false;
}
if (!mysqli_select_db($this->connection, $database))
{
throw new \RuntimeException('Could not connect to database.');
}
$this->_database = $database;
return true;
}
/**
* Set the connection to use UTF-8 character encoding.
*
* @return boolean True on success.
*
*/
public function setUTF()
{
$this->connect();
return $this->connection->set_charset('utf8');
}
/**
* Method to commit a transaction.
*
* @return void
*
* @throws \RuntimeException
*/
public function transactionCommit()
{
$this->connect();
$this->setQuery('COMMIT');
$this->execute();
}
/**
* Method to roll back a transaction.
*
* @return void
*
* @throws \RuntimeException
*/
public function transactionRollback()
{
$this->connect();
$this->setQuery('ROLLBACK');
$this->execute();
}
/**
* Method to initialize a transaction.
*
* @return void
*
* @throws \RuntimeException
*/
public function transactionStart()
{
$this->connect();
$this->setQuery('START TRANSACTION');
$this->execute();
}
/**
* Method to fetch a row from the result set cursor as an array.
*
* @param mixed $cursor The optional result set cursor from which to fetch the row.
*
* @return mixed Either the next row from the result set or false if there are no more rows.
*
*/
protected function fetchArray($cursor = null)
{
return mysqli_fetch_row($cursor ? $cursor : $this->cursor);
}
/**
* Method to fetch a row from the result set cursor as an associative array.
*
* @param mixed $cursor The optional result set cursor from which to fetch the row.
*
* @return mixed Either the next row from the result set or false if there are no more rows.
*
*/
protected function fetchAssoc($cursor = null)
{
return mysqli_fetch_assoc($cursor ? $cursor : $this->cursor);
}
/**
* Method to fetch a row from the result set cursor as an object.
*
* @param mixed $cursor The optional result set cursor from which to fetch the row.
* @param string $class The class name to use for the returned row object.
*
* @return mixed Either the next row from the result set or false if there are no more rows.
*
*/
protected function fetchObject($cursor = null, $class = 'stdClass')
{
return mysqli_fetch_object($cursor ? $cursor : $this->cursor, $class);
}
/**
* Method to free up the memory used for the result set.
*
* @param mixed $cursor The optional result set cursor from which to fetch the row.
*
* @return void
*
*/
protected function freeResult($cursor = null)
{
mysqli_free_result($cursor ? $cursor : $this->cursor);
}
/**
* Unlocks tables in the database.
*
* @return Mysqli Returns this object to support chaining.
*
* @throws \RuntimeException
*/
public function unlockTables()
{
$this->setQuery('UNLOCK TABLES')->execute();
return $this;
}
}