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freenetis-github/system/libraries/drivers/Database/Mysqli.php @ cd149dd5

8baed187 Michal Kliment
<?php defined('SYSPATH') OR die('No direct access allowed.');
/**
* MySQLi Database Driver
*
* $Id: Mysqli.php 4344 2009-05-11 16:41:39Z zombor $
*
* @package Core
* @author Kohana Team
* @copyright (c) 2007-2008 Kohana Team
* @license http://kohanaphp.com/license.html
*/
class Database_Mysqli_Driver extends Database_Mysql_Driver {

// Database connection link
protected $link;
protected $db_config;
protected $statements = array();

/**
* Sets the config for the class.
*
* @param array database configuration
*/
public function __construct($config)
{
$this->db_config = $config;

Log::add('debug', 'MySQLi Database Driver Initialized');
}

/**
* Closes the database connection.
*/
public function __destruct()
{
is_object($this->link) and $this->link->close();
}

public function connect()
{
// Check if link already exists
if (is_object($this->link))
return $this->link;

// Import the connect variables
extract($this->db_config['connection']);

// Build the connection info
$host = isset($host) ? $host : $socket;

// Make the connection and select the database
if ($this->link = new mysqli($host, $user, $pass, $database, $port))
{
if ($charset = $this->db_config['character_set'])
{
$this->set_charset($charset);
}

// Clear password after successful connect
$this->db_config['connection']['pass'] = NULL;

return $this->link;
}

return FALSE;
}

public function query($sql)
{
// Only cache if it's turned on, and only cache if it's not a write statement
if ($this->db_config['cache'] AND ! preg_match('#\b(?:INSERT|UPDATE|REPLACE|SET|DELETE|TRUNCATE)\b#i', $sql))
{
$hash = $this->query_hash($sql);

if ( ! isset($this->query_cache[$hash]))
{
// Set the cached object
$this->query_cache[$hash] = new Kohana_Mysqli_Result($this->link, $this->db_config['object'], $sql);
}
else
{
// Rewind cached result
$this->query_cache[$hash]->rewind();
}

// Return the cached query
return $this->query_cache[$hash];
}

return new Kohana_Mysqli_Result($this->link, $this->db_config['object'], $sql);
}

public function set_charset($charset)
{
if ($this->link->set_charset($charset) === FALSE)
throw new Kohana_Database_Exception('database.error', $this->show_error());
}

public function escape_str($str)
{
if (!$this->db_config['escape'])
return $str;

is_object($this->link) or $this->connect();

return $this->link->real_escape_string($str);
}

public function show_error()
{
return $this->link->error;
}

} // End Database_Mysqli_Driver Class

/**
* MySQLi Result
*/
class Kohana_Mysqli_Result extends Database_Result {

// Database connection
protected $link;

// Data fetching types
protected $fetch_type = 'mysqli_fetch_object';
protected $return_type = MYSQLI_ASSOC;

/**
* Sets up the result variables.
*
* @param object database link
* @param boolean return objects or arrays
* @param string SQL query that was run
*/
public function __construct($link, $object = TRUE, $sql)
{
$this->link = $link;

if ( ! $this->link->multi_query($sql))
{
// SQL error
throw new Kohana_Database_Exception('database.error', $this->link->error.' - '.$sql);
}
else
{
$this->result = $this->link->store_result();

// If the query is an object, it was a SELECT, SHOW, DESCRIBE, EXPLAIN query
if (is_object($this->result))
{
$this->current_row = 0;
$this->total_rows = $this->result->num_rows;
$this->fetch_type = ($object === TRUE) ? 'fetch_object' : 'fetch_array';
}
elseif ($this->link->error)
{
// SQL error
throw new Kohana_Database_Exception('database.error', $this->link->error.' - '.$sql);
}
else
{
// Its an DELETE, INSERT, REPLACE, or UPDATE query
$this->insert_id = $this->link->insert_id;
$this->total_rows = $this->link->affected_rows;
}
}

// Set result type
$this->result($object);

// Store the SQL
$this->sql = $sql;
}

/**
* Magic __destruct function, frees the result.
*/
public function __destruct()
{
if (is_object($this->result))
{
$this->result->free_result();

// this is kinda useless, but needs to be done to avoid the "Commands out of sync; you
// can't run this command now" error. Basically, we get all results after the first one
// (the one we actually need) and free them.
if (is_resource($this->link) AND $this->link->more_results())
{
do
{
if ($result = $this->link->store_result())
{
$result->free_result();
}
} while ($this->link->next_result());
}
}
}

public function result($object = TRUE, $type = MYSQLI_ASSOC)
{
$this->fetch_type = ((bool) $object) ? 'fetch_object' : 'fetch_array';

// This check has to be outside the previous statement, because we do not
// know the state of fetch_type when $object = NULL
// NOTE - The class set by $type must be defined before fetching the result,
// autoloading is disabled to save a lot of stupid overhead.
if ($this->fetch_type == 'fetch_object')
{
$this->return_type = (is_string($type) AND Kohana::auto_load($type)) ? $type : 'stdClass';
}
else
{
$this->return_type = $type;
}

return $this;
}

public function as_array($object = NULL, $type = MYSQLI_ASSOC)
{
return $this->result_array($object, $type);
}

public function result_array($object = NULL, $type = MYSQLI_ASSOC)
{
$rows = array();

if (is_string($object))
{
$fetch = $object;
}
elseif (is_bool($object))
{
if ($object === TRUE)
{
$fetch = 'fetch_object';

// NOTE - The class set by $type must be defined before fetching the result,
// autoloading is disabled to save a lot of stupid overhead.
$type = (is_string($type) AND Kohana::auto_load($type)) ? $type : 'stdClass';
}
else
{
$fetch = 'fetch_array';
}
}
else
{
// Use the default config values
$fetch = $this->fetch_type;

if ($fetch == 'fetch_object')
{
$type = (is_string($type) AND Kohana::auto_load($type)) ? $type : 'stdClass';
}
}

if ($this->result->num_rows)
{
// Reset the pointer location to make sure things work properly
$this->result->data_seek(0);

while ($row = $this->result->$fetch($type))
{
$rows[] = $row;
}
}

return isset($rows) ? $rows : array();
}

public function list_fields()
{
$field_names = array();
while ($field = $this->result->fetch_field())
{
$field_names[] = $field->name;
}

return $field_names;
}

public function seek($offset)
{
if ($this->offsetExists($offset) AND $this->result->data_seek($offset))
{
// Set the current row to the offset
$this->current_row = $offset;

return TRUE;
}

return FALSE;
}

public function offsetGet($offset)
{
if ( ! $this->seek($offset))
return FALSE;

// Return the row
$fetch = $this->fetch_type;
return $this->result->$fetch($this->return_type);
}

} // End Mysqli_Result Class

/**
* MySQLi Prepared Statement (experimental)
*/
class Kohana_Mysqli_Statement {

protected $link = NULL;
protected $stmt;
protected $var_names = array();
protected $var_values = array();

public function __construct($sql, $link)
{
$this->link = $link;

$this->stmt = $this->link->prepare($sql);

return $this;
}

public function __destruct()
{
$this->stmt->close();
}

// Sets the bind parameters
public function bind_params($param_types, $params)
{
$this->var_names = array_keys($params);
$this->var_values = array_values($params);
call_user_func_array(array($this->stmt, 'bind_param'), array_merge($param_types, $var_names));

return $this;
}

public function bind_result($params)
{
call_user_func_array(array($this->stmt, 'bind_result'), $params);
}

// Runs the statement
public function execute()
{
foreach ($this->var_names as $key => $name)
{
$$name = $this->var_values[$key];
}
$this->stmt->execute();
return $this->stmt;
}
}