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<?php |
|
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ |
|
/** |
* The PEAR DB driver for PHP's mysqli extension |
* for interacting with MySQL databases |
* |
* PHP versions 4 and 5 |
* |
* LICENSE: This source file is subject to version 3.0 of the PHP license |
* that is available through the world-wide-web at the following URI: |
* http://www.php.net/license/3_0.txt. If you did not receive a copy of |
* the PHP License and are unable to obtain it through the web, please |
* send a note to license@php.net so we can mail you a copy immediately. |
* |
* @category Database |
* @package DB |
* @author Daniel Convissor <danielc@php.net> |
* @copyright 1997-2005 The PHP Group |
* @license http://www.php.net/license/3_0.txt PHP License 3.0 |
* @version CVS: $Id: mysqli.php,v 1.69 2005/03/04 23:12:36 danielc Exp $ |
* @link http://pear.php.net/package/DB |
*/ |
|
/** |
* Obtain the DB_common class so it can be extended from |
*/ |
require_once 'DB/common.php'; |
|
/** |
* The methods PEAR DB uses to interact with PHP's mysqli extension |
* for interacting with MySQL databases |
* |
* This is for MySQL versions 4.1 and above. Requires PHP 5. |
* |
* Note that persistent connections no longer exist. |
* |
* These methods overload the ones declared in DB_common. |
* |
* @category Database |
* @package DB |
* @author Daniel Convissor <danielc@php.net> |
* @copyright 1997-2005 The PHP Group |
* @license http://www.php.net/license/3_0.txt PHP License 3.0 |
* @version Release: 1.7.6 |
* @link http://pear.php.net/package/DB |
* @since Class functional since Release 1.6.3 |
*/ |
class DB_mysqli extends DB_common |
{ |
// {{{ properties |
|
/** |
* The DB driver type (mysql, oci8, odbc, etc.) |
* @var string |
*/ |
var $phptype = 'mysqli'; |
|
/** |
* The database syntax variant to be used (db2, access, etc.), if any |
* @var string |
*/ |
var $dbsyntax = 'mysqli'; |
|
/** |
* The capabilities of this DB implementation |
* |
* The 'new_link' element contains the PHP version that first provided |
* new_link support for this DBMS. Contains false if it's unsupported. |
* |
* Meaning of the 'limit' element: |
* + 'emulate' = emulate with fetch row by number |
* + 'alter' = alter the query |
* + false = skip rows |
* |
* @var array |
*/ |
var $features = array( |
'limit' => 'alter', |
'new_link' => false, |
'numrows' => true, |
'pconnect' => false, |
'prepare' => false, |
'ssl' => true, |
'transactions' => true, |
); |
|
/** |
* A mapping of native error codes to DB error codes |
* @var array |
*/ |
var $errorcode_map = array( |
1004 => DB_ERROR_CANNOT_CREATE, |
1005 => DB_ERROR_CANNOT_CREATE, |
1006 => DB_ERROR_CANNOT_CREATE, |
1007 => DB_ERROR_ALREADY_EXISTS, |
1008 => DB_ERROR_CANNOT_DROP, |
1022 => DB_ERROR_ALREADY_EXISTS, |
1044 => DB_ERROR_ACCESS_VIOLATION, |
1046 => DB_ERROR_NODBSELECTED, |
1048 => DB_ERROR_CONSTRAINT, |
1049 => DB_ERROR_NOSUCHDB, |
1050 => DB_ERROR_ALREADY_EXISTS, |
1051 => DB_ERROR_NOSUCHTABLE, |
1054 => DB_ERROR_NOSUCHFIELD, |
1061 => DB_ERROR_ALREADY_EXISTS, |
1062 => DB_ERROR_ALREADY_EXISTS, |
1064 => DB_ERROR_SYNTAX, |
1091 => DB_ERROR_NOT_FOUND, |
1100 => DB_ERROR_NOT_LOCKED, |
1136 => DB_ERROR_VALUE_COUNT_ON_ROW, |
1142 => DB_ERROR_ACCESS_VIOLATION, |
1146 => DB_ERROR_NOSUCHTABLE, |
1216 => DB_ERROR_CONSTRAINT, |
1217 => DB_ERROR_CONSTRAINT, |
); |
|
/** |
* The raw database connection created by PHP |
* @var resource |
*/ |
var $connection; |
|
/** |
* The DSN information for connecting to a database |
* @var array |
*/ |
var $dsn = array(); |
|
|
/** |
* Should data manipulation queries be committed automatically? |
* @var bool |
* @access private |
*/ |
var $autocommit = true; |
|
/** |
* The quantity of transactions begun |
* |
* {@internal While this is private, it can't actually be designated |
* private in PHP 5 because it is directly accessed in the test suite.}} |
* |
* @var integer |
* @access private |
*/ |
var $transaction_opcount = 0; |
|
/** |
* The database specified in the DSN |
* |
* It's a fix to allow calls to different databases in the same script. |
* |
* @var string |
* @access private |
*/ |
var $_db = ''; |
|
/** |
* Array for converting MYSQLI_*_FLAG constants to text values |
* @var array |
* @access public |
* @since Property available since Release 1.6.5 |
*/ |
var $mysqli_flags = array( |
MYSQLI_NOT_NULL_FLAG => 'not_null', |
MYSQLI_PRI_KEY_FLAG => 'primary_key', |
MYSQLI_UNIQUE_KEY_FLAG => 'unique_key', |
MYSQLI_MULTIPLE_KEY_FLAG => 'multiple_key', |
MYSQLI_BLOB_FLAG => 'blob', |
MYSQLI_UNSIGNED_FLAG => 'unsigned', |
MYSQLI_ZEROFILL_FLAG => 'zerofill', |
MYSQLI_AUTO_INCREMENT_FLAG => 'auto_increment', |
MYSQLI_TIMESTAMP_FLAG => 'timestamp', |
MYSQLI_SET_FLAG => 'set', |
// MYSQLI_NUM_FLAG => 'numeric', // unnecessary |
// MYSQLI_PART_KEY_FLAG => 'multiple_key', // duplicatvie |
MYSQLI_GROUP_FLAG => 'group_by' |
); |
|
/** |
* Array for converting MYSQLI_TYPE_* constants to text values |
* @var array |
* @access public |
* @since Property available since Release 1.6.5 |
*/ |
var $mysqli_types = array( |
MYSQLI_TYPE_DECIMAL => 'decimal', |
MYSQLI_TYPE_TINY => 'tinyint', |
MYSQLI_TYPE_SHORT => 'int', |
MYSQLI_TYPE_LONG => 'int', |
MYSQLI_TYPE_FLOAT => 'float', |
MYSQLI_TYPE_DOUBLE => 'double', |
// MYSQLI_TYPE_NULL => 'DEFAULT NULL', // let flags handle it |
MYSQLI_TYPE_TIMESTAMP => 'timestamp', |
MYSQLI_TYPE_LONGLONG => 'bigint', |
MYSQLI_TYPE_INT24 => 'mediumint', |
MYSQLI_TYPE_DATE => 'date', |
MYSQLI_TYPE_TIME => 'time', |
MYSQLI_TYPE_DATETIME => 'datetime', |
MYSQLI_TYPE_YEAR => 'year', |
MYSQLI_TYPE_NEWDATE => 'date', |
MYSQLI_TYPE_ENUM => 'enum', |
MYSQLI_TYPE_SET => 'set', |
MYSQLI_TYPE_TINY_BLOB => 'tinyblob', |
MYSQLI_TYPE_MEDIUM_BLOB => 'mediumblob', |
MYSQLI_TYPE_LONG_BLOB => 'longblob', |
MYSQLI_TYPE_BLOB => 'blob', |
MYSQLI_TYPE_VAR_STRING => 'varchar', |
MYSQLI_TYPE_STRING => 'char', |
MYSQLI_TYPE_GEOMETRY => 'geometry', |
); |
|
|
// }}} |
// {{{ constructor |
|
/** |
* This constructor calls <kbd>$this->DB_common()</kbd> |
* |
* @return void |
*/ |
function DB_mysqli() |
{ |
$this->DB_common(); |
} |
|
// }}} |
// {{{ connect() |
|
/** |
* Connect to the database server, log in and open the database |
* |
* Don't call this method directly. Use DB::connect() instead. |
* |
* PEAR DB's mysqli driver supports the following extra DSN options: |
* + When the 'ssl' $option passed to DB::connect() is true: |
* + key The path to the key file. |
* + cert The path to the certificate file. |
* + ca The path to the certificate authority file. |
* + capath The path to a directory that contains trusted SSL |
* CA certificates in pem format. |
* + cipher The list of allowable ciphers for SSL encryption. |
* |
* Example of how to connect using SSL: |
* <code> |
* require_once 'DB.php'; |
* |
* $dsn = array( |
* 'phptype' => 'mysqli', |
* 'username' => 'someuser', |
* 'password' => 'apasswd', |
* 'hostspec' => 'localhost', |
* 'database' => 'thedb', |
* 'key' => 'client-key.pem', |
* 'cert' => 'client-cert.pem', |
* 'ca' => 'cacert.pem', |
* 'capath' => '/path/to/ca/dir', |
* 'cipher' => 'AES', |
* ); |
* |
* $options = array( |
* 'ssl' => true, |
* ); |
* |
* $db =& DB::connect($dsn, $options); |
* if (PEAR::isError($db)) { |
* die($db->getMessage()); |
* } |
* </code> |
* |
* @param array $dsn the data source name |
* @param bool $persistent should the connection be persistent? |
* |
* @return int DB_OK on success. A DB_Error object on failure. |
*/ |
function connect($dsn, $persistent = false) |
{ |
if (!PEAR::loadExtension('mysqli')) { |
return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND); |
} |
|
$this->dsn = $dsn; |
if ($dsn['dbsyntax']) { |
$this->dbsyntax = $dsn['dbsyntax']; |
} |
|
$ini = ini_get('track_errors'); |
ini_set('track_errors', 1); |
$php_errormsg = ''; |
|
if ($this->getOption('ssl') === true) { |
$init = mysqli_init(); |
mysqli_ssl_set( |
$init, |
empty($dsn['key']) ? null : $dsn['key'], |
empty($dsn['cert']) ? null : $dsn['cert'], |
empty($dsn['ca']) ? null : $dsn['ca'], |
empty($dsn['capath']) ? null : $dsn['capath'], |
empty($dsn['cipher']) ? null : $dsn['cipher'] |
); |
if ($this->connection = @mysqli_real_connect( |
$init, |
$dsn['hostspec'], |
$dsn['username'], |
$dsn['password'], |
$dsn['database'], |
$dsn['port'], |
$dsn['socket'])) |
{ |
$this->connection = $init; |
} |
} else { |
$this->connection = @mysqli_connect( |
$dsn['hostspec'], |
$dsn['username'], |
$dsn['password'], |
$dsn['database'], |
$dsn['port'], |
$dsn['socket'] |
); |
} |
|
ini_set('track_errors', $ini); |
|
if (!$this->connection) { |
if (($err = @mysqli_connect_error()) != '') { |
return $this->raiseError(DB_ERROR_CONNECT_FAILED, |
null, null, null, |
$err); |
} else { |
return $this->raiseError(DB_ERROR_CONNECT_FAILED, |
null, null, null, |
$php_errormsg); |
} |
} |
|
if ($dsn['database']) { |
$this->_db = $dsn['database']; |
} |
|
return DB_OK; |
} |
|
// }}} |
// {{{ disconnect() |
|
/** |
* Disconnects from the database server |
* |
* @return bool TRUE on success, FALSE on failure |
*/ |
function disconnect() |
{ |
$ret = @mysqli_close($this->connection); |
$this->connection = null; |
return $ret; |
} |
|
// }}} |
// {{{ simpleQuery() |
|
/** |
* Sends a query to the database server |
* |
* @param string the SQL query string |
* |
* @return mixed + a PHP result resrouce for successful SELECT queries |
* + the DB_OK constant for other successful queries |
* + a DB_Error object on failure |
*/ |
function simpleQuery($query) |
{ |
$ismanip = DB::isManip($query); |
$this->last_query = $query; |
$query = $this->modifyQuery($query); |
if ($this->_db) { |
if (!@mysqli_select_db($this->connection, $this->_db)) { |
return $this->mysqliRaiseError(DB_ERROR_NODBSELECTED); |
} |
} |
if (!$this->autocommit && $ismanip) { |
if ($this->transaction_opcount == 0) { |
$result = @mysqli_query($this->connection, 'SET AUTOCOMMIT=0'); |
$result = @mysqli_query($this->connection, 'BEGIN'); |
if (!$result) { |
return $this->mysqliRaiseError(); |
} |
} |
$this->transaction_opcount++; |
} |
$result = @mysqli_query($this->connection, $query); |
if (!$result) { |
return $this->mysqliRaiseError(); |
} |
if (is_object($result)) { |
return $result; |
} |
return DB_OK; |
} |
|
// }}} |
// {{{ nextResult() |
|
/** |
* Move the internal mysql result pointer to the next available result. |
* |
* This method has not been implemented yet. |
* |
* @param resource $result a valid sql result resource |
* @return false |
* @access public |
*/ |
function nextResult($result) |
{ |
return false; |
} |
|
// }}} |
// {{{ fetchInto() |
|
/** |
* Places a row from the result set into the given array |
* |
* Formating of the array and the data therein are configurable. |
* See DB_result::fetchInto() for more information. |
* |
* This method is not meant to be called directly. Use |
* DB_result::fetchInto() instead. It can't be declared "protected" |
* because DB_result is a separate object. |
* |
* @param resource $result the query result resource |
* @param array $arr the referenced array to put the data in |
* @param int $fetchmode how the resulting array should be indexed |
* @param int $rownum the row number to fetch (0 = first row) |
* |
* @return mixed DB_OK on success, NULL when the end of a result set is |
* reached or on failure |
* |
* @see DB_result::fetchInto() |
*/ |
function fetchInto($result, &$arr, $fetchmode, $rownum = null) |
{ |
if ($rownum !== null) { |
if (!@mysqli_data_seek($result, $rownum)) { |
return null; |
} |
} |
if ($fetchmode & DB_FETCHMODE_ASSOC) { |
$arr = @mysqli_fetch_array($result, MYSQLI_ASSOC); |
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) { |
$arr = array_change_key_case($arr, CASE_LOWER); |
} |
} else { |
$arr = @mysqli_fetch_row($result); |
} |
if (!$arr) { |
return null; |
} |
if ($this->options['portability'] & DB_PORTABILITY_RTRIM) { |
/* |
* Even though this DBMS already trims output, we do this because |
* a field might have intentional whitespace at the end that |
* gets removed by DB_PORTABILITY_RTRIM under another driver. |
*/ |
$this->_rtrimArrayValues($arr); |
} |
if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) { |
$this->_convertNullArrayValuesToEmpty($arr); |
} |
return DB_OK; |
} |
|
// }}} |
// {{{ freeResult() |
|
/** |
* Deletes the result set and frees the memory occupied by the result set |
* |
* This method is not meant to be called directly. Use |
* DB_result::free() instead. It can't be declared "protected" |
* because DB_result is a separate object. |
* |
* @param resource $result PHP's query result resource |
* |
* @return bool TRUE on success, FALSE if $result is invalid |
* |
* @see DB_result::free() |
*/ |
function freeResult($result) |
{ |
return @mysqli_free_result($result); |
} |
|
// }}} |
// {{{ numCols() |
|
/** |
* Gets the number of columns in a result set |
* |
* This method is not meant to be called directly. Use |
* DB_result::numCols() instead. It can't be declared "protected" |
* because DB_result is a separate object. |
* |
* @param resource $result PHP's query result resource |
* |
* @return int the number of columns. A DB_Error object on failure. |
* |
* @see DB_result::numCols() |
*/ |
function numCols($result) |
{ |
$cols = @mysqli_num_fields($result); |
if (!$cols) { |
return $this->mysqliRaiseError(); |
} |
return $cols; |
} |
|
// }}} |
// {{{ numRows() |
|
/** |
* Gets the number of rows in a result set |
* |
* This method is not meant to be called directly. Use |
* DB_result::numRows() instead. It can't be declared "protected" |
* because DB_result is a separate object. |
* |
* @param resource $result PHP's query result resource |
* |
* @return int the number of rows. A DB_Error object on failure. |
* |
* @see DB_result::numRows() |
*/ |
function numRows($result) |
{ |
$rows = @mysqli_num_rows($result); |
if ($rows === null) { |
return $this->mysqliRaiseError(); |
} |
return $rows; |
} |
|
// }}} |
// {{{ autoCommit() |
|
/** |
* Enables or disables automatic commits |
* |
* @param bool $onoff true turns it on, false turns it off |
* |
* @return int DB_OK on success. A DB_Error object if the driver |
* doesn't support auto-committing transactions. |
*/ |
function autoCommit($onoff = false) |
{ |
// XXX if $this->transaction_opcount > 0, we should probably |
// issue a warning here. |
$this->autocommit = $onoff ? true : false; |
return DB_OK; |
} |
|
// }}} |
// {{{ commit() |
|
/** |
* Commits the current transaction |
* |
* @return int DB_OK on success. A DB_Error object on failure. |
*/ |
function commit() |
{ |
if ($this->transaction_opcount > 0) { |
if ($this->_db) { |
if (!@mysqli_select_db($this->connection, $this->_db)) { |
return $this->mysqliRaiseError(DB_ERROR_NODBSELECTED); |
} |
} |
$result = @mysqli_query($this->connection, 'COMMIT'); |
$result = @mysqli_query($this->connection, 'SET AUTOCOMMIT=1'); |
$this->transaction_opcount = 0; |
if (!$result) { |
return $this->mysqliRaiseError(); |
} |
} |
return DB_OK; |
} |
|
// }}} |
// {{{ rollback() |
|
/** |
* Reverts the current transaction |
* |
* @return int DB_OK on success. A DB_Error object on failure. |
*/ |
function rollback() |
{ |
if ($this->transaction_opcount > 0) { |
if ($this->_db) { |
if (!@mysqli_select_db($this->connection, $this->_db)) { |
return $this->mysqliRaiseError(DB_ERROR_NODBSELECTED); |
} |
} |
$result = @mysqli_query($this->connection, 'ROLLBACK'); |
$result = @mysqli_query($this->connection, 'SET AUTOCOMMIT=1'); |
$this->transaction_opcount = 0; |
if (!$result) { |
return $this->mysqliRaiseError(); |
} |
} |
return DB_OK; |
} |
|
// }}} |
// {{{ affectedRows() |
|
/** |
* Determines the number of rows affected by a data maniuplation query |
* |
* 0 is returned for queries that don't manipulate data. |
* |
* @return int the number of rows. A DB_Error object on failure. |
*/ |
function affectedRows() |
{ |
if (DB::isManip($this->last_query)) { |
return @mysqli_affected_rows($this->connection); |
} else { |
return 0; |
} |
} |
|
// }}} |
// {{{ nextId() |
|
/** |
* Returns the next free id in a sequence |
* |
* @param string $seq_name name of the sequence |
* @param boolean $ondemand when true, the seqence is automatically |
* created if it does not exist |
* |
* @return int the next id number in the sequence. |
* A DB_Error object on failure. |
* |
* @see DB_common::nextID(), DB_common::getSequenceName(), |
* DB_mysqli::createSequence(), DB_mysqli::dropSequence() |
*/ |
function nextId($seq_name, $ondemand = true) |
{ |
$seqname = $this->getSequenceName($seq_name); |
do { |
$repeat = 0; |
$this->pushErrorHandling(PEAR_ERROR_RETURN); |
$result = $this->query('UPDATE ' . $seqname |
. ' SET id = LAST_INSERT_ID(id + 1)'); |
$this->popErrorHandling(); |
if ($result === DB_OK) { |
// COMMON CASE |
$id = @mysqli_insert_id($this->connection); |
if ($id != 0) { |
return $id; |
} |
|
// EMPTY SEQ TABLE |
// Sequence table must be empty for some reason, |
// so fill it and return 1 |
// Obtain a user-level lock |
$result = $this->getOne('SELECT GET_LOCK(' |
. "'${seqname}_lock', 10)"); |
if (DB::isError($result)) { |
return $this->raiseError($result); |
} |
if ($result == 0) { |
return $this->mysqliRaiseError(DB_ERROR_NOT_LOCKED); |
} |
|
// add the default value |
$result = $this->query('REPLACE INTO ' . $seqname |
. ' (id) VALUES (0)'); |
if (DB::isError($result)) { |
return $this->raiseError($result); |
} |
|
// Release the lock |
$result = $this->getOne('SELECT RELEASE_LOCK(' |
. "'${seqname}_lock')"); |
if (DB::isError($result)) { |
return $this->raiseError($result); |
} |
// We know what the result will be, so no need to try again |
return 1; |
|
} elseif ($ondemand && DB::isError($result) && |
$result->getCode() == DB_ERROR_NOSUCHTABLE) |
{ |
// ONDEMAND TABLE CREATION |
$result = $this->createSequence($seq_name); |
|
// Since createSequence initializes the ID to be 1, |
// we do not need to retrieve the ID again (or we will get 2) |
if (DB::isError($result)) { |
return $this->raiseError($result); |
} else { |
// First ID of a newly created sequence is 1 |
return 1; |
} |
|
} elseif (DB::isError($result) && |
$result->getCode() == DB_ERROR_ALREADY_EXISTS) |
{ |
// BACKWARDS COMPAT |
// see _BCsequence() comment |
$result = $this->_BCsequence($seqname); |
if (DB::isError($result)) { |
return $this->raiseError($result); |
} |
$repeat = 1; |
} |
} while ($repeat); |
|
return $this->raiseError($result); |
} |
|
/** |
* Creates a new sequence |
* |
* @param string $seq_name name of the new sequence |
* |
* @return int DB_OK on success. A DB_Error object on failure. |
* |
* @see DB_common::createSequence(), DB_common::getSequenceName(), |
* DB_mysqli::nextID(), DB_mysqli::dropSequence() |
*/ |
function createSequence($seq_name) |
{ |
$seqname = $this->getSequenceName($seq_name); |
$res = $this->query('CREATE TABLE ' . $seqname |
. ' (id INTEGER UNSIGNED AUTO_INCREMENT NOT NULL,' |
. ' PRIMARY KEY(id))'); |
if (DB::isError($res)) { |
return $res; |
} |
// insert yields value 1, nextId call will generate ID 2 |
return $this->query("INSERT INTO ${seqname} (id) VALUES (0)"); |
} |
|
// }}} |
// {{{ dropSequence() |
|
/** |
* Deletes a sequence |
* |
* @param string $seq_name name of the sequence to be deleted |
* |
* @return int DB_OK on success. A DB_Error object on failure. |
* |
* @see DB_common::dropSequence(), DB_common::getSequenceName(), |
* DB_mysql::nextID(), DB_mysql::createSequence() |
*/ |
function dropSequence($seq_name) |
{ |
return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name)); |
} |
|
// }}} |
// {{{ _BCsequence() |
|
/** |
* Backwards compatibility with old sequence emulation implementation |
* (clean up the dupes) |
* |
* @param string $seqname the sequence name to clean up |
* |
* @return bool true on success. A DB_Error object on failure. |
* |
* @access private |
*/ |
function _BCsequence($seqname) |
{ |
// Obtain a user-level lock... this will release any previous |
// application locks, but unlike LOCK TABLES, it does not abort |
// the current transaction and is much less frequently used. |
$result = $this->getOne("SELECT GET_LOCK('${seqname}_lock',10)"); |
if (DB::isError($result)) { |
return $result; |
} |
if ($result == 0) { |
// Failed to get the lock, can't do the conversion, bail |
// with a DB_ERROR_NOT_LOCKED error |
return $this->mysqliRaiseError(DB_ERROR_NOT_LOCKED); |
} |
|
$highest_id = $this->getOne("SELECT MAX(id) FROM ${seqname}"); |
if (DB::isError($highest_id)) { |
return $highest_id; |
} |
|
// This should kill all rows except the highest |
// We should probably do something if $highest_id isn't |
// numeric, but I'm at a loss as how to handle that... |
$result = $this->query('DELETE FROM ' . $seqname |
. " WHERE id <> $highest_id"); |
if (DB::isError($result)) { |
return $result; |
} |
|
// If another thread has been waiting for this lock, |
// it will go thru the above procedure, but will have no |
// real effect |
$result = $this->getOne("SELECT RELEASE_LOCK('${seqname}_lock')"); |
if (DB::isError($result)) { |
return $result; |
} |
return true; |
} |
|
// }}} |
// {{{ quoteIdentifier() |
|
/** |
* Quotes a string so it can be safely used as a table or column name |
* |
* MySQL can't handle the backtick character (<kbd>`</kbd>) in |
* table or column names. |
* |
* @param string $str identifier name to be quoted |
* |
* @return string quoted identifier string |
* |
* @see DB_common::quoteIdentifier() |
* @since Method available since Release 1.6.0 |
*/ |
function quoteIdentifier($str) |
{ |
return '`' . $str . '`'; |
} |
|
// }}} |
// {{{ escapeSimple() |
|
/** |
* Escapes a string according to the current DBMS's standards |
* |
* @param string $str the string to be escaped |
* |
* @return string the escaped string |
* |
* @see DB_common::quoteSmart() |
* @since Method available since Release 1.6.0 |
*/ |
function escapeSimple($str) |
{ |
return @mysqli_real_escape_string($this->connection, $str); |
} |
|
// }}} |
// {{{ modifyLimitQuery() |
|
/** |
* Adds LIMIT clauses to a query string according to current DBMS standards |
* |
* @param string $query the query to modify |
* @param int $from the row to start to fetching (0 = the first row) |
* @param int $count the numbers of rows to fetch |
* @param mixed $params array, string or numeric data to be used in |
* execution of the statement. Quantity of items |
* passed must match quantity of placeholders in |
* query: meaning 1 placeholder for non-array |
* parameters or 1 placeholder per array element. |
* |
* @return string the query string with LIMIT clauses added |
* |
* @access protected |
*/ |
function modifyLimitQuery($query, $from, $count, $params = array()) |
{ |
if (DB::isManip($query)) { |
return $query . " LIMIT $count"; |
} else { |
return $query . " LIMIT $from, $count"; |
} |
} |
|
// }}} |
// {{{ mysqliRaiseError() |
|
/** |
* Produces a DB_Error object regarding the current problem |
* |
* @param int $errno if the error is being manually raised pass a |
* DB_ERROR* constant here. If this isn't passed |
* the error information gathered from the DBMS. |
* |
* @return object the DB_Error object |
* |
* @see DB_common::raiseError(), |
* DB_mysqli::errorNative(), DB_common::errorCode() |
*/ |
function mysqliRaiseError($errno = null) |
{ |
if ($errno === null) { |
if ($this->options['portability'] & DB_PORTABILITY_ERRORS) { |
$this->errorcode_map[1022] = DB_ERROR_CONSTRAINT; |
$this->errorcode_map[1048] = DB_ERROR_CONSTRAINT_NOT_NULL; |
$this->errorcode_map[1062] = DB_ERROR_CONSTRAINT; |
} else { |
// Doing this in case mode changes during runtime. |
$this->errorcode_map[1022] = DB_ERROR_ALREADY_EXISTS; |
$this->errorcode_map[1048] = DB_ERROR_CONSTRAINT; |
$this->errorcode_map[1062] = DB_ERROR_ALREADY_EXISTS; |
} |
$errno = $this->errorCode(mysqli_errno($this->connection)); |
} |
return $this->raiseError($errno, null, null, null, |
@mysqli_errno($this->connection) . ' ** ' . |
@mysqli_error($this->connection)); |
} |
|
// }}} |
// {{{ errorNative() |
|
/** |
* Gets the DBMS' native error code produced by the last query |
* |
* @return int the DBMS' error code |
*/ |
function errorNative() |
{ |
return @mysqli_errno($this->connection); |
} |
|
// }}} |
// {{{ tableInfo() |
|
/** |
* Returns information about a table or a result set |
* |
* @param object|string $result DB_result object from a query or a |
* string containing the name of a table. |
* While this also accepts a query result |
* resource identifier, this behavior is |
* deprecated. |
* @param int $mode a valid tableInfo mode |
* |
* @return array an associative array with the information requested. |
* A DB_Error object on failure. |
* |
* @see DB_common::setOption() |
*/ |
function tableInfo($result, $mode = null) |
{ |
if (is_string($result)) { |
/* |
* Probably received a table name. |
* Create a result resource identifier. |
*/ |
$id = @mysqli_query($this->connection, |
"SELECT * FROM $result LIMIT 0"); |
$got_string = true; |
} elseif (isset($result->result)) { |
/* |
* Probably received a result object. |
* Extract the result resource identifier. |
*/ |
$id = $result->result; |
$got_string = false; |
} else { |
/* |
* Probably received a result resource identifier. |
* Copy it. |
* Deprecated. Here for compatibility only. |
*/ |
$id = $result; |
$got_string = false; |
} |
|
if (!is_a($id, 'mysqli_result')) { |
return $this->mysqliRaiseError(DB_ERROR_NEED_MORE_DATA); |
} |
|
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) { |
$case_func = 'strtolower'; |
} else { |
$case_func = 'strval'; |
} |
|
$count = @mysqli_num_fields($id); |
$res = array(); |
|
if ($mode) { |
$res['num_fields'] = $count; |
} |
|
for ($i = 0; $i < $count; $i++) { |
$tmp = @mysqli_fetch_field($id); |
|
$flags = ''; |
foreach ($this->mysqli_flags as $const => $means) { |
if ($tmp->flags & $const) { |
$flags .= $means . ' '; |
} |
} |
if ($tmp->def) { |
$flags .= 'default_' . rawurlencode($tmp->def); |
} |
$flags = trim($flags); |
|
$res[$i] = array( |
'table' => $case_func($tmp->table), |
'name' => $case_func($tmp->name), |
'type' => isset($this->mysqli_types[$tmp->type]) |
? $this->mysqli_types[$tmp->type] |
: 'unknown', |
'len' => $tmp->max_length, |
'flags' => $flags, |
); |
|
if ($mode & DB_TABLEINFO_ORDER) { |
$res['order'][$res[$i]['name']] = $i; |
} |
if ($mode & DB_TABLEINFO_ORDERTABLE) { |
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i; |
} |
} |
|
// free the result only if we were called on a table |
if ($got_string) { |
@mysqli_free_result($id); |
} |
return $res; |
} |
|
// }}} |
// {{{ getSpecialQuery() |
|
/** |
* Obtains the query string needed for listing a given type of objects |
* |
* @param string $type the kind of objects you want to retrieve |
* |
* @return string the SQL query string or null if the driver doesn't |
* support the object type requested |
* |
* @access protected |
* @see DB_common::getListOf() |
*/ |
function getSpecialQuery($type) |
{ |
switch ($type) { |
case 'tables': |
return 'SHOW TABLES'; |
case 'users': |
return 'SELECT DISTINCT User FROM mysql.user'; |
case 'databases': |
return 'SHOW DATABASES'; |
default: |
return null; |
} |
} |
|
// }}} |
|
} |
|
/* |
* Local variables: |
* tab-width: 4 |
* c-basic-offset: 4 |
* End: |
*/ |
|
?> |