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fa3ca0548f12a7a8f7774cfa918cba426be45f96
gnu-social/extlib/DB.php

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some extlibs that were missing from 0.6.0 darcs-hash:20080930133847-5ed1f-429b4b3c6ff4f56f50e2dad19de76066589b9e05.gz
2008-09-30 09:38:47 -04:00
<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* Database independent query interface
*
* 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 Stig Bakken <ssb@php.net>
* @author Tomas V.V.Cox <cox@idecnet.com>
* @author Daniel Convissor <danielc@php.net>
* @copyright 1997-2007 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version CVS: $Id: DB.php,v 1.88 2007/08/12 05:27:25 aharvey Exp $
* @link http://pear.php.net/package/DB
*/
/**
* Obtain the PEAR class so it can be extended from
*/
require_once 'PEAR.php';
// {{{ constants
// {{{ error codes
/**#@+
* One of PEAR DB's portable error codes.
* @see DB_common::errorCode(), DB::errorMessage()
*
* {@internal If you add an error code here, make sure you also add a textual
* version of it in DB::errorMessage().}}
*/
/**
* The code returned by many methods upon success
*/
define('DB_OK', 1);
/**
* Unkown error
*/
define('DB_ERROR', -1);
/**
* Syntax error
*/
define('DB_ERROR_SYNTAX', -2);
/**
* Tried to insert a duplicate value into a primary or unique index
*/
define('DB_ERROR_CONSTRAINT', -3);
/**
* An identifier in the query refers to a non-existant object
*/
define('DB_ERROR_NOT_FOUND', -4);
/**
* Tried to create a duplicate object
*/
define('DB_ERROR_ALREADY_EXISTS', -5);
/**
* The current driver does not support the action you attempted
*/
define('DB_ERROR_UNSUPPORTED', -6);
/**
* The number of parameters does not match the number of placeholders
*/
define('DB_ERROR_MISMATCH', -7);
/**
* A literal submitted did not match the data type expected
*/
define('DB_ERROR_INVALID', -8);
/**
* The current DBMS does not support the action you attempted
*/
define('DB_ERROR_NOT_CAPABLE', -9);
/**
* A literal submitted was too long so the end of it was removed
*/
define('DB_ERROR_TRUNCATED', -10);
/**
* A literal number submitted did not match the data type expected
*/
define('DB_ERROR_INVALID_NUMBER', -11);
/**
* A literal date submitted did not match the data type expected
*/
define('DB_ERROR_INVALID_DATE', -12);
/**
* Attempt to divide something by zero
*/
define('DB_ERROR_DIVZERO', -13);
/**
* A database needs to be selected
*/
define('DB_ERROR_NODBSELECTED', -14);
/**
* Could not create the object requested
*/
define('DB_ERROR_CANNOT_CREATE', -15);
/**
* Could not drop the database requested because it does not exist
*/
define('DB_ERROR_CANNOT_DROP', -17);
/**
* An identifier in the query refers to a non-existant table
*/
define('DB_ERROR_NOSUCHTABLE', -18);
/**
* An identifier in the query refers to a non-existant column
*/
define('DB_ERROR_NOSUCHFIELD', -19);
/**
* The data submitted to the method was inappropriate
*/
define('DB_ERROR_NEED_MORE_DATA', -20);
/**
* The attempt to lock the table failed
*/
define('DB_ERROR_NOT_LOCKED', -21);
/**
* The number of columns doesn't match the number of values
*/
define('DB_ERROR_VALUE_COUNT_ON_ROW', -22);
/**
* The DSN submitted has problems
*/
define('DB_ERROR_INVALID_DSN', -23);
/**
* Could not connect to the database
*/
define('DB_ERROR_CONNECT_FAILED', -24);
/**
* The PHP extension needed for this DBMS could not be found
*/
define('DB_ERROR_EXTENSION_NOT_FOUND',-25);
/**
* The present user has inadequate permissions to perform the task requestd
*/
define('DB_ERROR_ACCESS_VIOLATION', -26);
/**
* The database requested does not exist
*/
define('DB_ERROR_NOSUCHDB', -27);
/**
* Tried to insert a null value into a column that doesn't allow nulls
*/
define('DB_ERROR_CONSTRAINT_NOT_NULL',-29);
/**#@-*/
// }}}
// {{{ prepared statement-related
/**#@+
* Identifiers for the placeholders used in prepared statements.
* @see DB_common::prepare()
*/
/**
* Indicates a scalar (<kbd>?</kbd>) placeholder was used
*
* Quote and escape the value as necessary.
*/
define('DB_PARAM_SCALAR', 1);
/**
* Indicates an opaque (<kbd>&</kbd>) placeholder was used
*
* The value presented is a file name. Extract the contents of that file
* and place them in this column.
*/
define('DB_PARAM_OPAQUE', 2);
/**
* Indicates a misc (<kbd>!</kbd>) placeholder was used
*
* The value should not be quoted or escaped.
*/
define('DB_PARAM_MISC', 3);
/**#@-*/
// }}}
// {{{ binary data-related
/**#@+
* The different ways of returning binary data from queries.
*/
/**
* Sends the fetched data straight through to output
*/
define('DB_BINMODE_PASSTHRU', 1);
/**
* Lets you return data as usual
*/
define('DB_BINMODE_RETURN', 2);
/**
* Converts the data to hex format before returning it
*
* For example the string "123" would become "313233".
*/
define('DB_BINMODE_CONVERT', 3);
/**#@-*/
// }}}
// {{{ fetch modes
/**#@+
* Fetch Modes.
* @see DB_common::setFetchMode()
*/
/**
* Indicates the current default fetch mode should be used
* @see DB_common::$fetchmode
*/
define('DB_FETCHMODE_DEFAULT', 0);
/**
* Column data indexed by numbers, ordered from 0 and up
*/
define('DB_FETCHMODE_ORDERED', 1);
/**
* Column data indexed by column names
*/
define('DB_FETCHMODE_ASSOC', 2);
/**
* Column data as object properties
*/
define('DB_FETCHMODE_OBJECT', 3);
/**
* For multi-dimensional results, make the column name the first level
* of the array and put the row number in the second level of the array
*
* This is flipped from the normal behavior, which puts the row numbers
* in the first level of the array and the column names in the second level.
*/
define('DB_FETCHMODE_FLIPPED', 4);
/**#@-*/
/**#@+
* Old fetch modes. Left here for compatibility.
*/
define('DB_GETMODE_ORDERED', DB_FETCHMODE_ORDERED);
define('DB_GETMODE_ASSOC', DB_FETCHMODE_ASSOC);
define('DB_GETMODE_FLIPPED', DB_FETCHMODE_FLIPPED);
/**#@-*/
// }}}
// {{{ tableInfo() && autoPrepare()-related
/**#@+
* The type of information to return from the tableInfo() method.
*
* Bitwised constants, so they can be combined using <kbd>|</kbd>
* and removed using <kbd>^</kbd>.
*
* @see DB_common::tableInfo()
*
* {@internal Since the TABLEINFO constants are bitwised, if more of them are
* added in the future, make sure to adjust DB_TABLEINFO_FULL accordingly.}}
*/
define('DB_TABLEINFO_ORDER', 1);
define('DB_TABLEINFO_ORDERTABLE', 2);
define('DB_TABLEINFO_FULL', 3);
/**#@-*/
/**#@+
* The type of query to create with the automatic query building methods.
* @see DB_common::autoPrepare(), DB_common::autoExecute()
*/
define('DB_AUTOQUERY_INSERT', 1);
define('DB_AUTOQUERY_UPDATE', 2);
/**#@-*/
// }}}
// {{{ portability modes
/**#@+
* Portability Modes.
*
* Bitwised constants, so they can be combined using <kbd>|</kbd>
* and removed using <kbd>^</kbd>.
*
* @see DB_common::setOption()
*
* {@internal Since the PORTABILITY constants are bitwised, if more of them are
* added in the future, make sure to adjust DB_PORTABILITY_ALL accordingly.}}
*/
/**
* Turn off all portability features
*/
define('DB_PORTABILITY_NONE', 0);
/**
* Convert names of tables and fields to lower case
* when using the get*(), fetch*() and tableInfo() methods
*/
define('DB_PORTABILITY_LOWERCASE', 1);
/**
* Right trim the data output by get*() and fetch*()
*/
define('DB_PORTABILITY_RTRIM', 2);
/**
* Force reporting the number of rows deleted
*/
define('DB_PORTABILITY_DELETE_COUNT', 4);
/**
* Enable hack that makes numRows() work in Oracle
*/
define('DB_PORTABILITY_NUMROWS', 8);
/**
* Makes certain error messages in certain drivers compatible
* with those from other DBMS's
*
* + mysql, mysqli: change unique/primary key constraints
* DB_ERROR_ALREADY_EXISTS -> DB_ERROR_CONSTRAINT
*
* + odbc(access): MS's ODBC driver reports 'no such field' as code
* 07001, which means 'too few parameters.' When this option is on
* that code gets mapped to DB_ERROR_NOSUCHFIELD.
*/
define('DB_PORTABILITY_ERRORS', 16);
/**
* Convert null values to empty strings in data output by
* get*() and fetch*()
*/
define('DB_PORTABILITY_NULL_TO_EMPTY', 32);
/**
* Turn on all portability features
*/
define('DB_PORTABILITY_ALL', 63);
/**#@-*/
// }}}
// }}}
// {{{ class DB
/**
* Database independent query interface
*
* The main "DB" class is simply a container class with some static
* methods for creating DB objects as well as some utility functions
* common to all parts of DB.
*
* The object model of DB is as follows (indentation means inheritance):
* <pre>
* DB The main DB class. This is simply a utility class
* with some "static" methods for creating DB objects as
* well as common utility functions for other DB classes.
*
* DB_common The base for each DB implementation. Provides default
* | implementations (in OO lingo virtual methods) for
* | the actual DB implementations as well as a bunch of
* | query utility functions.
* |
* +-DB_mysql The DB implementation for MySQL. Inherits DB_common.
* When calling DB::factory or DB::connect for MySQL
* connections, the object returned is an instance of this
* class.
* </pre>
*
* @category Database
* @package DB
* @author Stig Bakken <ssb@php.net>
* @author Tomas V.V.Cox <cox@idecnet.com>
* @author Daniel Convissor <danielc@php.net>
* @copyright 1997-2007 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version Release: 1.7.13
* @link http://pear.php.net/package/DB
*/
class DB
{
// {{{ &factory()
/**
* Create a new DB object for the specified database type but don't
* connect to the database
*
* @param string $type the database type (eg "mysql")
* @param array $options an associative array of option names and values
*
* @return object a new DB object. A DB_Error object on failure.
*
* @see DB_common::setOption()
*/
function &factory($type, $options = false)
{
if (!is_array($options)) {
$options = array('persistent' => $options);
}
if (isset($options['debug']) && $options['debug'] >= 2) {
// expose php errors with sufficient debug level
include_once "DB/{$type}.php";
} else {
@include_once "DB/{$type}.php";
}
$classname = "DB_${type}";
if (!class_exists($classname)) {
$tmp = PEAR::raiseError(null, DB_ERROR_NOT_FOUND, null, null,
"Unable to include the DB/{$type}.php"
. " file for '$dsn'",
'DB_Error', true);
return $tmp;
}
@$obj = new $classname;
foreach ($options as $option => $value) {
$test = $obj->setOption($option, $value);
if (DB::isError($test)) {
return $test;
}
}
return $obj;
}
// }}}
// {{{ &connect()
/**
* Create a new DB object including a connection to the specified database
*
* Example 1.
* <code>
* require_once 'DB.php';
*
* $dsn = 'pgsql://user:password@host/database';
* $options = array(
* 'debug' => 2,
* 'portability' => DB_PORTABILITY_ALL,
* );
*
* $db =& DB::connect($dsn, $options);
* if (PEAR::isError($db)) {
* die($db->getMessage());
* }
* </code>
*
* @param mixed $dsn the string "data source name" or array in the
* format returned by DB::parseDSN()
* @param array $options an associative array of option names and values
*
* @return object a new DB object. A DB_Error object on failure.
*
* @uses DB_dbase::connect(), DB_fbsql::connect(), DB_ibase::connect(),
* DB_ifx::connect(), DB_msql::connect(), DB_mssql::connect(),
* DB_mysql::connect(), DB_mysqli::connect(), DB_oci8::connect(),
* DB_odbc::connect(), DB_pgsql::connect(), DB_sqlite::connect(),
* DB_sybase::connect()
*
* @uses DB::parseDSN(), DB_common::setOption(), PEAR::isError()
*/
function &connect($dsn, $options = array())
{
$dsninfo = DB::parseDSN($dsn);
$type = $dsninfo['phptype'];
if (!is_array($options)) {
/*
* For backwards compatibility. $options used to be boolean,
* indicating whether the connection should be persistent.
*/
$options = array('persistent' => $options);
}
if (isset($options['debug']) && $options['debug'] >= 2) {
// expose php errors with sufficient debug level
include_once "DB/${type}.php";
} else {
@include_once "DB/${type}.php";
}
$classname = "DB_${type}";
if (!class_exists($classname)) {
$tmp = PEAR::raiseError(null, DB_ERROR_NOT_FOUND, null, null,
"Unable to include the DB/{$type}.php"
. " file for '$dsn'",
'DB_Error', true);
return $tmp;
}
@$obj = new $classname;
foreach ($options as $option => $value) {
$test = $obj->setOption($option, $value);
if (DB::isError($test)) {
return $test;
}
}
$err = $obj->connect($dsninfo, $obj->getOption('persistent'));
if (DB::isError($err)) {
if (is_array($dsn)) {
$err->addUserInfo(DB::getDSNString($dsn, true));
} else {
$err->addUserInfo($dsn);
}
return $err;
}
return $obj;
}
// }}}
// {{{ apiVersion()
/**
* Return the DB API version
*
* @return string the DB API version number
*/
function apiVersion()
{
return '1.7.13';
}
// }}}
// {{{ isError()
/**
* Determines if a variable is a DB_Error object
*
* @param mixed $value the variable to check
*
* @return bool whether $value is DB_Error object
*/
function isError($value)
{
return is_a($value, 'DB_Error');
}
// }}}
// {{{ isConnection()
/**
* Determines if a value is a DB_<driver> object
*
* @param mixed $value the value to test
*
* @return bool whether $value is a DB_<driver> object
*/
function isConnection($value)
{
return (is_object($value) &&
is_subclass_of($value, 'db_common') &&
method_exists($value, 'simpleQuery'));
}
// }}}
// {{{ isManip()
/**
* Tell whether a query is a data manipulation or data definition query
*
* Examples of data manipulation queries are INSERT, UPDATE and DELETE.
* Examples of data definition queries are CREATE, DROP, ALTER, GRANT,
* REVOKE.
*
* @param string $query the query
*
* @return boolean whether $query is a data manipulation query
*/
function isManip($query)
{
$manips = 'INSERT|UPDATE|DELETE|REPLACE|'
. 'CREATE|DROP|'
. 'LOAD DATA|SELECT .* INTO .* FROM|COPY|'
. 'ALTER|GRANT|REVOKE|'
. 'LOCK|UNLOCK';
if (preg_match('/^\s*"?(' . $manips . ')\s+/i', $query)) {
return true;
}
return false;
}
// }}}
// {{{ errorMessage()
/**
* Return a textual error message for a DB error code
*
* @param integer $value the DB error code
*
* @return string the error message or false if the error code was
* not recognized
*/
function errorMessage($value)
{
static $errorMessages;
if (!isset($errorMessages)) {
$errorMessages = array(
DB_ERROR => 'unknown error',
DB_ERROR_ACCESS_VIOLATION => 'insufficient permissions',
DB_ERROR_ALREADY_EXISTS => 'already exists',
DB_ERROR_CANNOT_CREATE => 'can not create',
DB_ERROR_CANNOT_DROP => 'can not drop',
DB_ERROR_CONNECT_FAILED => 'connect failed',
DB_ERROR_CONSTRAINT => 'constraint violation',
DB_ERROR_CONSTRAINT_NOT_NULL=> 'null value violates not-null constraint',
DB_ERROR_DIVZERO => 'division by zero',
DB_ERROR_EXTENSION_NOT_FOUND=> 'extension not found',
DB_ERROR_INVALID => 'invalid',
DB_ERROR_INVALID_DATE => 'invalid date or time',
DB_ERROR_INVALID_DSN => 'invalid DSN',
DB_ERROR_INVALID_NUMBER => 'invalid number',
DB_ERROR_MISMATCH => 'mismatch',
DB_ERROR_NEED_MORE_DATA => 'insufficient data supplied',
DB_ERROR_NODBSELECTED => 'no database selected',
DB_ERROR_NOSUCHDB => 'no such database',
DB_ERROR_NOSUCHFIELD => 'no such field',
DB_ERROR_NOSUCHTABLE => 'no such table',
DB_ERROR_NOT_CAPABLE => 'DB backend not capable',
DB_ERROR_NOT_FOUND => 'not found',
DB_ERROR_NOT_LOCKED => 'not locked',
DB_ERROR_SYNTAX => 'syntax error',
DB_ERROR_UNSUPPORTED => 'not supported',
DB_ERROR_TRUNCATED => 'truncated',
DB_ERROR_VALUE_COUNT_ON_ROW => 'value count on row',
DB_OK => 'no error',
);
}
if (DB::isError($value)) {
$value = $value->getCode();
}
return isset($errorMessages[$value]) ? $errorMessages[$value]
: $errorMessages[DB_ERROR];
}
// }}}
// {{{ parseDSN()
/**
* Parse a data source name
*
* Additional keys can be added by appending a URI query string to the
* end of the DSN.
*
* The format of the supplied DSN is in its fullest form:
* <code>
* phptype(dbsyntax)://username:password@protocol+hostspec/database?option=8&another=true
* </code>
*
* Most variations are allowed:
* <code>
* phptype://username:password@protocol+hostspec:110//usr/db_file.db?mode=0644
* phptype://username:password@hostspec/database_name
* phptype://username:password@hostspec
* phptype://username@hostspec
* phptype://hostspec/database
* phptype://hostspec
* phptype(dbsyntax)
* phptype
* </code>
*
* @param string $dsn Data Source Name to be parsed
*
* @return array an associative array with the following keys:
* + phptype: Database backend used in PHP (mysql, odbc etc.)
* + dbsyntax: Database used with regards to SQL syntax etc.
* + protocol: Communication protocol to use (tcp, unix etc.)
* + hostspec: Host specification (hostname[:port])
* + database: Database to use on the DBMS server
* + username: User name for login
* + password: Password for login
*/
function parseDSN($dsn)
{
$parsed = array(
'phptype' => false,
'dbsyntax' => false,
'username' => false,
'password' => false,
'protocol' => false,
'hostspec' => false,
'port' => false,
'socket' => false,
'database' => false,
);
if (is_array($dsn)) {
$dsn = array_merge($parsed, $dsn);
if (!$dsn['dbsyntax']) {
$dsn['dbsyntax'] = $dsn['phptype'];
}
return $dsn;
}
// Find phptype and dbsyntax
if (($pos = strpos($dsn, '://')) !== false) {
$str = substr($dsn, 0, $pos);
$dsn = substr($dsn, $pos + 3);
} else {
$str = $dsn;
$dsn = null;
}
// Get phptype and dbsyntax
// $str => phptype(dbsyntax)
if (preg_match('|^(.+?)\((.*?)\)$|', $str, $arr)) {
$parsed['phptype'] = $arr[1];
$parsed['dbsyntax'] = !$arr[2] ? $arr[1] : $arr[2];
} else {
$parsed['phptype'] = $str;
$parsed['dbsyntax'] = $str;
}
if (!count($dsn)) {
return $parsed;
}
// Get (if found): username and password
// $dsn => username:password@protocol+hostspec/database
if (($at = strrpos($dsn,'@')) !== false) {
$str = substr($dsn, 0, $at);
$dsn = substr($dsn, $at + 1);
if (($pos = strpos($str, ':')) !== false) {
$parsed['username'] = rawurldecode(substr($str, 0, $pos));
$parsed['password'] = rawurldecode(substr($str, $pos + 1));
} else {
$parsed['username'] = rawurldecode($str);
}
}
// Find protocol and hostspec
if (preg_match('|^([^(]+)\((.*?)\)/?(.*?)$|', $dsn, $match)) {
// $dsn => proto(proto_opts)/database
$proto = $match[1];
$proto_opts = $match[2] ? $match[2] : false;
$dsn = $match[3];
} else {
// $dsn => protocol+hostspec/database (old format)
if (strpos($dsn, '+') !== false) {
list($proto, $dsn) = explode('+', $dsn, 2);
}
if (strpos($dsn, '/') !== false) {
list($proto_opts, $dsn) = explode('/', $dsn, 2);
} else {
$proto_opts = $dsn;
$dsn = null;
}
}
// process the different protocol options
$parsed['protocol'] = (!empty($proto)) ? $proto : 'tcp';
$proto_opts = rawurldecode($proto_opts);
if (strpos($proto_opts, ':') !== false) {
list($proto_opts, $parsed['port']) = explode(':', $proto_opts);
}
if ($parsed['protocol'] == 'tcp') {
$parsed['hostspec'] = $proto_opts;
} elseif ($parsed['protocol'] == 'unix') {
$parsed['socket'] = $proto_opts;
}
// Get dabase if any
// $dsn => database
if ($dsn) {
if (($pos = strpos($dsn, '?')) === false) {
// /database
$parsed['database'] = rawurldecode($dsn);
} else {
// /database?param1=value1&param2=value2
$parsed['database'] = rawurldecode(substr($dsn, 0, $pos));
$dsn = substr($dsn, $pos + 1);
if (strpos($dsn, '&') !== false) {
$opts = explode('&', $dsn);
} else { // database?param1=value1
$opts = array($dsn);
}
foreach ($opts as $opt) {
list($key, $value) = explode('=', $opt);
if (!isset($parsed[$key])) {
// don't allow params overwrite
$parsed[$key] = rawurldecode($value);
}
}
}
}
return $parsed;
}
// }}}
// {{{ getDSNString()
/**
* Returns the given DSN in a string format suitable for output.
*
* @param array|string the DSN to parse and format
* @param boolean true to hide the password, false to include it
* @return string
*/
function getDSNString($dsn, $hidePassword) {
/* Calling parseDSN will ensure that we have all the array elements
* defined, and means that we deal with strings and array in the same
* manner. */
$dsnArray = DB::parseDSN($dsn);
if ($hidePassword) {
$dsnArray['password'] = 'PASSWORD';
}
/* Protocol is special-cased, as using the default "tcp" along with an
* Oracle TNS connection string fails. */
if (is_string($dsn) && strpos($dsn, 'tcp') === false && $dsnArray['protocol'] == 'tcp') {
$dsnArray['protocol'] = false;
}
// Now we just have to construct the actual string. This is ugly.
$dsnString = $dsnArray['phptype'];
if ($dsnArray['dbsyntax']) {
$dsnString .= '('.$dsnArray['dbsyntax'].')';
}
$dsnString .= '://'
.$dsnArray['username']
.':'
.$dsnArray['password']
.'@'
.$dsnArray['protocol'];
if ($dsnArray['socket']) {
$dsnString .= '('.$dsnArray['socket'].')';
}
if ($dsnArray['protocol'] && $dsnArray['hostspec']) {
$dsnString .= '+';
}
$dsnString .= $dsnArray['hostspec'];
if ($dsnArray['port']) {
$dsnString .= ':'.$dsnArray['port'];
}
$dsnString .= '/'.$dsnArray['database'];
/* Option handling. Unfortunately, parseDSN simply places options into
* the top-level array, so we'll first get rid of the fields defined by
* DB and see what's left. */
unset($dsnArray['phptype'],
$dsnArray['dbsyntax'],
$dsnArray['username'],
$dsnArray['password'],
$dsnArray['protocol'],
$dsnArray['socket'],
$dsnArray['hostspec'],
$dsnArray['port'],
$dsnArray['database']
);
if (count($dsnArray) > 0) {
$dsnString .= '?';
$i = 0;
foreach ($dsnArray as $key => $value) {
if (++$i > 1) {
$dsnString .= '&';
}
$dsnString .= $key.'='.$value;
}
}
return $dsnString;
}
// }}}
}
// }}}
// {{{ class DB_Error
/**
* DB_Error implements a class for reporting portable database error
* messages
*
* @category Database
* @package DB
* @author Stig Bakken <ssb@php.net>
* @copyright 1997-2007 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version Release: 1.7.13
* @link http://pear.php.net/package/DB
*/
class DB_Error extends PEAR_Error
{
// {{{ constructor
/**
* DB_Error constructor
*
* @param mixed $code DB error code, or string with error message
* @param int $mode what "error mode" to operate in
* @param int $level what error level to use for $mode &
* PEAR_ERROR_TRIGGER
* @param mixed $debuginfo additional debug info, such as the last query
*
* @see PEAR_Error
*/
function DB_Error($code = DB_ERROR, $mode = PEAR_ERROR_RETURN,
$level = E_USER_NOTICE, $debuginfo = null)
{
if (is_int($code)) {
$this->PEAR_Error('DB Error: ' . DB::errorMessage($code), $code,
$mode, $level, $debuginfo);
} else {
$this->PEAR_Error("DB Error: $code", DB_ERROR,
$mode, $level, $debuginfo);
}
}
// }}}
}
// }}}
// {{{ class DB_result
/**
* This class implements a wrapper for a DB result set
*
* A new instance of this class will be returned by the DB implementation
* after processing a query that returns data.
*
* @category Database
* @package DB
* @author Stig Bakken <ssb@php.net>
* @copyright 1997-2007 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version Release: 1.7.13
* @link http://pear.php.net/package/DB
*/
class DB_result
{
// {{{ properties
/**
* Should results be freed automatically when there are no more rows?
* @var boolean
* @see DB_common::$options
*/
var $autofree;
/**
* A reference to the DB_<driver> object
* @var object
*/
var $dbh;
/**
* The current default fetch mode
* @var integer
* @see DB_common::$fetchmode
*/
var $fetchmode;
/**
* The name of the class into which results should be fetched when
* DB_FETCHMODE_OBJECT is in effect
*
* @var string
* @see DB_common::$fetchmode_object_class
*/
var $fetchmode_object_class;
/**
* The number of rows to fetch from a limit query
* @var integer
*/
var $limit_count = null;
/**
* The row to start fetching from in limit queries
* @var integer
*/
var $limit_from = null;
/**
* The execute parameters that created this result
* @var array
* @since Property available since Release 1.7.0
*/
var $parameters;
/**
* The query string that created this result
*
* Copied here incase it changes in $dbh, which is referenced
*
* @var string
* @since Property available since Release 1.7.0
*/
var $query;
/**
* The query result resource id created by PHP
* @var resource
*/
var $result;
/**
* The present row being dealt with
* @var integer
*/
var $row_counter = null;
/**
* The prepared statement resource id created by PHP in $dbh
*
* This resource is only available when the result set was created using
* a driver's native execute() method, not PEAR DB's emulated one.
*
* Copied here incase it changes in $dbh, which is referenced
*
* {@internal Mainly here because the InterBase/Firebird API is only
* able to retrieve data from result sets if the statemnt handle is
* still in scope.}}
*
* @var resource
* @since Property available since Release 1.7.0
*/
var $statement;
// }}}
// {{{ constructor
/**
* This constructor sets the object's properties
*
* @param object &$dbh the DB object reference
* @param resource $result the result resource id
* @param array $options an associative array with result options
*
* @return void
*/
function DB_result(&$dbh, $result, $options = array())
{
$this->autofree = $dbh->options['autofree'];
$this->dbh = &$dbh;
$this->fetchmode = $dbh->fetchmode;
$this->fetchmode_object_class = $dbh->fetchmode_object_class;
$this->parameters = $dbh->last_parameters;
$this->query = $dbh->last_query;
$this->result = $result;
$this->statement = empty($dbh->last_stmt) ? null : $dbh->last_stmt;
foreach ($options as $key => $value) {
$this->setOption($key, $value);
}
}
/**
* Set options for the DB_result object
*
* @param string $key the option to set
* @param mixed $value the value to set the option to
*
* @return void
*/
function setOption($key, $value = null)
{
switch ($key) {
case 'limit_from':
$this->limit_from = $value;
break;
case 'limit_count':
$this->limit_count = $value;
}
}
// }}}
// {{{ fetchRow()
/**
* Fetch a row of data and return it by reference into an array
*
* The type of array returned can be controlled either by setting this
* method's <var>$fetchmode</var> parameter or by changing the default
* fetch mode setFetchMode() before calling this method.
*
* There are two options for standardizing the information returned
* from databases, ensuring their values are consistent when changing
* DBMS's. These portability options can be turned on when creating a
* new DB object or by using setOption().
*
* + <var>DB_PORTABILITY_LOWERCASE</var>
* convert names of fields to lower case
*
* + <var>DB_PORTABILITY_RTRIM</var>
* right trim the data
*
* @param int $fetchmode the constant indicating how to format the data
* @param int $rownum the row number to fetch (index starts at 0)
*
* @return mixed an array or object containing the row's data,
* NULL when the end of the result set is reached
* or a DB_Error object on failure.
*
* @see DB_common::setOption(), DB_common::setFetchMode()
*/
function &fetchRow($fetchmode = DB_FETCHMODE_DEFAULT, $rownum = null)
{
if ($fetchmode === DB_FETCHMODE_DEFAULT) {
$fetchmode = $this->fetchmode;
}
if ($fetchmode === DB_FETCHMODE_OBJECT) {
$fetchmode = DB_FETCHMODE_ASSOC;
$object_class = $this->fetchmode_object_class;
}
if (is_null($rownum) && $this->limit_from !== null) {
if ($this->row_counter === null) {
$this->row_counter = $this->limit_from;
// Skip rows
if ($this->dbh->features['limit'] === false) {
$i = 0;
while ($i++ < $this->limit_from) {
$this->dbh->fetchInto($this->result, $arr, $fetchmode);
}
}
}
if ($this->row_counter >= ($this->limit_from + $this->limit_count))
{
if ($this->autofree) {
$this->free();
}
$tmp = null;
return $tmp;
}
if ($this->dbh->features['limit'] === 'emulate') {
$rownum = $this->row_counter;
}
$this->row_counter++;
}
$res = $this->dbh->fetchInto($this->result, $arr, $fetchmode, $rownum);
if ($res === DB_OK) {
if (isset($object_class)) {
// The default mode is specified in the
// DB_common::fetchmode_object_class property
if ($object_class == 'stdClass') {
$arr = (object) $arr;
} else {
$arr = new $object_class($arr);
}
}
return $arr;
}
if ($res == null && $this->autofree) {
$this->free();
}
return $res;
}
// }}}
// {{{ fetchInto()
/**
* Fetch a row of data into an array which is passed by reference
*
* The type of array returned can be controlled either by setting this
* method's <var>$fetchmode</var> parameter or by changing the default
* fetch mode setFetchMode() before calling this method.
*
* There are two options for standardizing the information returned
* from databases, ensuring their values are consistent when changing
* DBMS's. These portability options can be turned on when creating a
* new DB object or by using setOption().
*
* + <var>DB_PORTABILITY_LOWERCASE</var>
* convert names of fields to lower case
*
* + <var>DB_PORTABILITY_RTRIM</var>
* right trim the data
*
* @param array &$arr the variable where the data should be placed
* @param int $fetchmode the constant indicating how to format the data
* @param int $rownum the row number to fetch (index starts at 0)
*
* @return mixed DB_OK if a row is processed, NULL when the end of the
* result set is reached or a DB_Error object on failure
*
* @see DB_common::setOption(), DB_common::setFetchMode()
*/
function fetchInto(&$arr, $fetchmode = DB_FETCHMODE_DEFAULT, $rownum = null)
{
if ($fetchmode === DB_FETCHMODE_DEFAULT) {
$fetchmode = $this->fetchmode;
}
if ($fetchmode === DB_FETCHMODE_OBJECT) {
$fetchmode = DB_FETCHMODE_ASSOC;
$object_class = $this->fetchmode_object_class;
}
if (is_null($rownum) && $this->limit_from !== null) {
if ($this->row_counter === null) {
$this->row_counter = $this->limit_from;
// Skip rows
if ($this->dbh->features['limit'] === false) {
$i = 0;
while ($i++ < $this->limit_from) {
$this->dbh->fetchInto($this->result, $arr, $fetchmode);
}
}
}
if ($this->row_counter >= (
$this->limit_from + $this->limit_count))
{
if ($this->autofree) {
$this->free();
}
return null;
}
if ($this->dbh->features['limit'] === 'emulate') {
$rownum = $this->row_counter;
}
$this->row_counter++;
}
$res = $this->dbh->fetchInto($this->result, $arr, $fetchmode, $rownum);
if ($res === DB_OK) {
if (isset($object_class)) {
// default mode specified in the
// DB_common::fetchmode_object_class property
if ($object_class == 'stdClass') {
$arr = (object) $arr;
} else {
$arr = new $object_class($arr);
}
}
return DB_OK;
}
if ($res == null && $this->autofree) {
$this->free();
}
return $res;
}
// }}}
// {{{ numCols()
/**
* Get the the number of columns in a result set
*
* @return int the number of columns. A DB_Error object on failure.
*/
function numCols()
{
return $this->dbh->numCols($this->result);
}
// }}}
// {{{ numRows()
/**
* Get the number of rows in a result set
*
* @return int the number of rows. A DB_Error object on failure.
*/
function numRows()
{
if ($this->dbh->features['numrows'] === 'emulate'
&& $this->dbh->options['portability'] & DB_PORTABILITY_NUMROWS)
{
if ($this->dbh->features['prepare']) {
$res = $this->dbh->query($this->query, $this->parameters);
} else {
$res = $this->dbh->query($this->query);
}
if (DB::isError($res)) {
return $res;
}
$i = 0;
while ($res->fetchInto($tmp, DB_FETCHMODE_ORDERED)) {
$i++;
}
$count = $i;
} else {
$count = $this->dbh->numRows($this->result);
}
/* fbsql is checked for here because limit queries are implemented
* using a TOP() function, which results in fbsql_num_rows still
* returning the total number of rows that would have been returned,
* rather than the real number. As a result, we'll just do the limit
* calculations for fbsql in the same way as a database with emulated
* limits. Unfortunately, we can't just do this in DB_fbsql::numRows()
* because that only gets the result resource, rather than the full
* DB_Result object. */
if (($this->dbh->features['limit'] === 'emulate'
&& $this->limit_from !== null)
|| $this->dbh->phptype == 'fbsql') {
$limit_count = is_null($this->limit_count) ? $count : $this->limit_count;
if ($count < $this->limit_from) {
$count = 0;
} elseif ($count < ($this->limit_from + $limit_count)) {
$count -= $this->limit_from;
} else {
$count = $limit_count;
}
}
return $count;
}
// }}}
// {{{ nextResult()
/**
* Get the next result if a batch of queries was executed
*
* @return bool true if a new result is available or false if not
*/
function nextResult()
{
return $this->dbh->nextResult($this->result);
}
// }}}
// {{{ free()
/**
* Frees the resources allocated for this result set
*
* @return bool true on success. A DB_Error object on failure.
*/
function free()
{
$err = $this->dbh->freeResult($this->result);
if (DB::isError($err)) {
return $err;
}
$this->result = false;
$this->statement = false;
return true;
}
// }}}
// {{{ tableInfo()
/**
* @see DB_common::tableInfo()
* @deprecated Method deprecated some time before Release 1.2
*/
function tableInfo($mode = null)
{
if (is_string($mode)) {
return $this->dbh->raiseError(DB_ERROR_NEED_MORE_DATA);
}
return $this->dbh->tableInfo($this, $mode);
}
// }}}
// {{{ getQuery()
/**
* Determine the query string that created this result
*
* @return string the query string
*
* @since Method available since Release 1.7.0
*/
function getQuery()
{
return $this->query;
}
// }}}
// {{{ getRowCounter()
/**
* Tells which row number is currently being processed
*
* @return integer the current row being looked at. Starts at 1.
*/
function getRowCounter()
{
return $this->row_counter;
}
// }}}
}
// }}}
// {{{ class DB_row
/**
* PEAR DB Row Object
*
* The object contains a row of data from a result set. Each column's data
* is placed in a property named for the column.
*
* @category Database
* @package DB
* @author Stig Bakken <ssb@php.net>
* @copyright 1997-2007 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version Release: 1.7.13
* @link http://pear.php.net/package/DB
* @see DB_common::setFetchMode()
*/
class DB_row
{
// {{{ constructor
/**
* The constructor places a row's data into properties of this object
*
* @param array the array containing the row's data
*
* @return void
*/
function DB_row(&$arr)
{
foreach ($arr as $key => $value) {
$this->$key = &$arr[$key];
}
}
// }}}
}
// }}}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/
?>
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