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<?php/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: *//*** The PEAR DB driver for PHP's sqlite extension* for interacting with SQLite 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 Urs Gehrig <urs@circle.ch>* @author Mika Tuupola <tuupola@appelsiini.net>* @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 3.0* @version CVS: $Id: sqlite.php,v 1.2 2005-09-20 17:01:22 ddelon 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 sqlite extension* for interacting with SQLite databases** These methods overload the ones declared in DB_common.** NOTICE: This driver needs PHP's track_errors ini setting to be on.* It is automatically turned on when connecting to the database.* Make sure your scripts don't turn it off.** @category Database* @package DB* @author Urs Gehrig <urs@circle.ch>* @author Mika Tuupola <tuupola@appelsiini.net>* @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 3.0* @version Release: @package_version@* @link http://pear.php.net/package/DB*/class DB_sqlite extends DB_common{// {{{ properties/*** The DB driver type (mysql, oci8, odbc, etc.)* @var string*/var $phptype = 'sqlite';/*** The database syntax variant to be used (db2, access, etc.), if any* @var string*/var $dbsyntax = 'sqlite';/*** 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' => true,'prepare' => false,'ssl' => false,'transactions' => false,);/*** A mapping of native error codes to DB error codes** {@internal Error codes according to sqlite_exec. See the online* manual at http://sqlite.org/c_interface.html for info.* This error handling based on sqlite_exec is not yet implemented.}}** @var array*/var $errorcode_map = array();/*** The raw database connection created by PHP* @var resource*/var $connection;/*** The DSN information for connecting to a database* @var array*/var $dsn = array();/*** SQLite data types** @link http://www.sqlite.org/datatypes.html** @var array*/var $keywords = array ('BLOB' => '','BOOLEAN' => '','CHARACTER' => '','CLOB' => '','FLOAT' => '','INTEGER' => '','KEY' => '','NATIONAL' => '','NUMERIC' => '','NVARCHAR' => '','PRIMARY' => '','TEXT' => '','TIMESTAMP' => '','UNIQUE' => '','VARCHAR' => '','VARYING' => '',);/*** The most recent error message from $php_errormsg* @var string* @access private*/var $_lasterror = '';// }}}// {{{ constructor/*** This constructor calls <kbd>$this->DB_common()</kbd>** @return void*/function DB_sqlite(){$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 sqlite driver supports the following extra DSN options:* + mode The permissions for the database file, in four digit* chmod octal format (eg "0600").** Example of connecting to a database in read-only mode:* <code>* require_once 'DB.php';** $dsn = 'sqlite:///path/and/name/of/db/file?mode=0400';* $options = array(* 'portability' => DB_PORTABILITY_ALL,* );** $db =& DB::connect($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('sqlite')) {return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);}$this->dsn = $dsn;if ($dsn['dbsyntax']) {$this->dbsyntax = $dsn['dbsyntax'];}if ($dsn['database']) {if (!file_exists($dsn['database'])) {if (!touch($dsn['database'])) {return $this->sqliteRaiseError(DB_ERROR_NOT_FOUND);}if (!isset($dsn['mode']) ||!is_numeric($dsn['mode'])){$mode = 0644;} else {$mode = octdec($dsn['mode']);}if (!chmod($dsn['database'], $mode)) {return $this->sqliteRaiseError(DB_ERROR_NOT_FOUND);}if (!file_exists($dsn['database'])) {return $this->sqliteRaiseError(DB_ERROR_NOT_FOUND);}}if (!is_file($dsn['database'])) {return $this->sqliteRaiseError(DB_ERROR_INVALID);}if (!is_readable($dsn['database'])) {return $this->sqliteRaiseError(DB_ERROR_ACCESS_VIOLATION);}} else {return $this->sqliteRaiseError(DB_ERROR_ACCESS_VIOLATION);}$connect_function = $persistent ? 'sqlite_popen' : 'sqlite_open';// track_errors must remain on for simpleQuery()ini_set('track_errors', 1);$php_errormsg = '';if (!$this->connection = @$connect_function($dsn['database'])) {return $this->raiseError(DB_ERROR_NODBSELECTED,null, null, null,$php_errormsg);}return DB_OK;}// }}}// {{{ disconnect()/*** Disconnects from the database server** @return bool TRUE on success, FALSE on failure*/function disconnect(){$ret = @sqlite_close($this->connection);$this->connection = null;return $ret;}// }}}// {{{ simpleQuery()/*** Sends a query to the database server** NOTICE: This method needs PHP's track_errors ini setting to be on.* It is automatically turned on when connecting to the database.* Make sure your scripts don't turn it off.** @param string the SQL query string** @return mixed + a PHP result resrouce for successful SELECT queries* + the DB_OK constant for other successful queries* + a DB_Error object on failure*/function simpleQuery($query){$ismanip = DB::isManip($query);$this->last_query = $query;$query = $this->modifyQuery($query);$php_errormsg = '';$result = @sqlite_query($query, $this->connection);$this->_lasterror = $php_errormsg ? $php_errormsg : '';$this->result = $result;if (!$this->result) {return $this->sqliteRaiseError(null);}// sqlite_query() seems to allways return a resource// so cant use that. Using $ismanip insteadif (!$ismanip) {$numRows = $this->numRows($result);if (is_object($numRows)) {// we've got PEAR_Errorreturn $numRows;}return $result;}return DB_OK;}// }}}// {{{ nextResult()/*** Move the internal sqlite result pointer to the next available result** @param resource $result the valid sqlite result resource** @return bool true if a result is available otherwise return false*/function nextResult($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 (!@sqlite_seek($this->result, $rownum)) {return null;}}if ($fetchmode & DB_FETCHMODE_ASSOC) {$arr = @sqlite_fetch_array($result, SQLITE_ASSOC);if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {$arr = array_change_key_case($arr, CASE_LOWER);}} else {$arr = @sqlite_fetch_array($result, SQLITE_NUM);}if (!$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){// XXX No native free?if (!is_resource($result)) {return false;}$result = null;return true;}// }}}// {{{ 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){$cols = @sqlite_num_fields($result);if (!$cols) {return $this->sqliteRaiseError();}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){$rows = @sqlite_num_rows($result);if ($rows === null) {return $this->sqliteRaiseError();}return $rows;}// }}}// {{{ affected()/*** Determines the number of rows affected by a data maniuplation query** 0 is returned for queries that don't manipulate data.** @return int the number of rows. A DB_Error object on failure.*/function affectedRows(){return @sqlite_changes($this->connection);}// }}}// {{{ dropSequence()/*** Deletes a sequence** @param string $seq_name name of the sequence to be deleted** @return int DB_OK on success. A DB_Error object on failure.** @see DB_common::dropSequence(), DB_common::getSequenceName(),* DB_sqlite::nextID(), DB_sqlite::createSequence()*/function dropSequence($seq_name){return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name));}/*** Creates a new sequence** @param string $seq_name name of the new sequence** @return int DB_OK on success. A DB_Error object on failure.** @see DB_common::createSequence(), DB_common::getSequenceName(),* DB_sqlite::nextID(), DB_sqlite::dropSequence()*/function createSequence($seq_name){$seqname = $this->getSequenceName($seq_name);$query = 'CREATE TABLE ' . $seqname .' (id INTEGER UNSIGNED PRIMARY KEY) ';$result = $this->query($query);if (DB::isError($result)) {return($result);}$query = "CREATE TRIGGER ${seqname}_cleanup AFTER INSERT ON $seqnameBEGINDELETE FROM $seqname WHERE id<LAST_INSERT_ROWID();END ";$result = $this->query($query);if (DB::isError($result)) {return($result);}}// }}}// {{{ nextId()/*** Returns the next free id in a sequence** @param string $seq_name name of the sequence* @param boolean $ondemand when true, the seqence is automatically* created if it does not exist** @return int the next id number in the sequence.* A DB_Error object on failure.** @see DB_common::nextID(), DB_common::getSequenceName(),* DB_sqlite::createSequence(), DB_sqlite::dropSequence()*/function nextId($seq_name, $ondemand = true){$seqname = $this->getSequenceName($seq_name);do {$repeat = 0;$this->pushErrorHandling(PEAR_ERROR_RETURN);$result = $this->query("INSERT INTO $seqname (id) VALUES (NULL)");$this->popErrorHandling();if ($result === DB_OK) {$id = @sqlite_last_insert_rowid($this->connection);if ($id != 0) {return $id;}} elseif ($ondemand && DB::isError($result) &&$result->getCode() == DB_ERROR_NOSUCHTABLE){$result = $this->createSequence($seq_name);if (DB::isError($result)) {return $this->raiseError($result);} else {$repeat = 1;}}} while ($repeat);return $this->raiseError($result);}// }}}// {{{ getDbFileStats()/*** Get the file stats for the current database** Possible arguments are dev, ino, mode, nlink, uid, gid, rdev, size,* atime, mtime, ctime, blksize, blocks or a numeric key between* 0 and 12.** @param string $arg the array key for stats()** @return mixed an array on an unspecified key, integer on a passed* arg and false at a stats error*/function getDbFileStats($arg = ''){$stats = stat($this->dsn['database']);if ($stats == false) {return false;}if (is_array($stats)) {if (is_numeric($arg)) {if (((int)$arg <= 12) & ((int)$arg >= 0)) {return false;}return $stats[$arg ];}if (array_key_exists(trim($arg), $stats)) {return $stats[$arg ];}}return $stats;}// }}}// {{{ escapeSimple()/*** Escapes a string according to the current DBMS's standards** In SQLite, this makes things safe for inserts/updates, but may* cause problems when performing text comparisons against columns* containing binary data. See the* {@link http://php.net/sqlite_escape_string PHP manual} for more info.** @param string $str the string to be escaped** @return string the escaped string** @since Method available since Release 1.6.1* @see DB_common::escapeSimple()*/function escapeSimple($str){return @sqlite_escape_string($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, $params = array()){return "$query LIMIT $count OFFSET $from";}// }}}// {{{ modifyQuery()/*** Changes a query string for various DBMS specific reasons** This little hack lets you know how many rows were deleted* when running a "DELETE FROM table" query. Only implemented* if the DB_PORTABILITY_DELETE_COUNT portability option is on.** @param string $query the query string to modify** @return string the modified query string** @access protected* @see DB_common::setOption()*/function modifyQuery($query){if ($this->options['portability'] & DB_PORTABILITY_DELETE_COUNT) {if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {$query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/','DELETE FROM \1 WHERE 1=1', $query);}}return $query;}// }}}// {{{ sqliteRaiseError()/*** Produces a DB_Error object regarding the current problem** @param int $errno if the error is being manually raised pass a* DB_ERROR* constant here. If this isn't passed* the error information gathered from the DBMS.** @return object the DB_Error object** @see DB_common::raiseError(),* DB_sqlite::errorNative(), DB_sqlite::errorCode()*/function sqliteRaiseError($errno = null){$native = $this->errorNative();if ($errno === null) {$errno = $this->errorCode($native);}$errorcode = @sqlite_last_error($this->connection);$userinfo = "$errorcode ** $this->last_query";return $this->raiseError($errno, null, null, $userinfo, $native);}// }}}// {{{ errorNative()/*** Gets the DBMS' native error message produced by the last query** {@internal This is used to retrieve more meaningfull error messages* because sqlite_last_error() does not provide adequate info.}}** @return string the DBMS' error message*/function errorNative(){return $this->_lasterror;}// }}}// {{{ errorCode()/*** Determines PEAR::DB error code from the database's text error message** @param string $errormsg the error message returned from the database** @return integer the DB error number*/function errorCode($errormsg){static $error_regexps;if (!isset($error_regexps)) {$error_regexps = array('/^no such table:/' => DB_ERROR_NOSUCHTABLE,'/^no such index:/' => DB_ERROR_NOT_FOUND,'/^(table|index) .* already exists$/' => DB_ERROR_ALREADY_EXISTS,'/PRIMARY KEY must be unique/i' => DB_ERROR_CONSTRAINT,'/is not unique/' => DB_ERROR_CONSTRAINT,'/columns .* are not unique/i' => DB_ERROR_CONSTRAINT,'/uniqueness constraint failed/' => DB_ERROR_CONSTRAINT,'/may not be NULL/' => DB_ERROR_CONSTRAINT_NOT_NULL,'/^no such column:/' => DB_ERROR_NOSUCHFIELD,'/column not present in both tables/i' => DB_ERROR_NOSUCHFIELD,'/^near ".*": syntax error$/' => DB_ERROR_SYNTAX,'/[0-9]+ values for [0-9]+ columns/i' => DB_ERROR_VALUE_COUNT_ON_ROW,);}foreach ($error_regexps as $regexp => $code) {if (preg_match($regexp, $errormsg)) {return $code;}}// Fall back to DB_ERROR if there was no mapping.return DB_ERROR;}// }}}// {{{ tableInfo()/*** Returns information about a table** @param string $result a string containing the name of a table* @param int $mode a valid tableInfo mode** @return array an associative array with the information requested.* A DB_Error object on failure.** @see DB_common::tableInfo()* @since Method available since Release 1.7.0*/function tableInfo($result, $mode = null){if (is_string($result)) {/** Probably received a table name.* Create a result resource identifier.*/$id = @sqlite_array_query($this->connection,"PRAGMA table_info('$result');",SQLITE_ASSOC);$got_string = true;} else {$this->last_query = '';return $this->raiseError(DB_ERROR_NOT_CAPABLE, null, null, null,'This DBMS can not obtain tableInfo' .' from result sets');}if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {$case_func = 'strtolower';} else {$case_func = 'strval';}$count = count($id);$res = array();if ($mode) {$res['num_fields'] = $count;}for ($i = 0; $i < $count; $i++) {if (strpos($id[$i]['type'], '(') !== false) {$bits = explode('(', $id[$i]['type']);$type = $bits[0];$len = rtrim($bits[1],')');} else {$type = $id[$i]['type'];$len = 0;}$flags = '';if ($id[$i]['pk']) {$flags .= 'primary_key ';}if ($id[$i]['notnull']) {$flags .= 'not_null ';}if ($id[$i]['dflt_value'] !== null) {$flags .= 'default_' . rawurlencode($id[$i]['dflt_value']);}$flags = trim($flags);$res[$i] = array('table' => $case_func($result),'name' => $case_func($id[$i]['name']),'type' => $type,'len' => $len,'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;}}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* @param array $args SQLITE DRIVER ONLY: a private array of arguments* used by the getSpecialQuery(). Do not use* this directly.** @return string the SQL query string or null if the driver doesn't* support the object type requested** @access protected* @see DB_common::getListOf()*/function getSpecialQuery($type, $args = array()){if (!is_array($args)) {return $this->raiseError('no key specified', null, null, null,'Argument has to be an array.');}switch ($type) {case 'master':return 'SELECT * FROM sqlite_master;';case 'tables':return "SELECT name FROM sqlite_master WHERE type='table' ". 'UNION ALL SELECT name FROM sqlite_temp_master '. "WHERE type='table' ORDER BY name;";case 'schema':return 'SELECT sql FROM (SELECT * FROM sqlite_master '. 'UNION ALL SELECT * FROM sqlite_temp_master) '. "WHERE type!='meta' ". 'ORDER BY tbl_name, type DESC, name;';case 'schemax':case 'schema_x':/** Use like:* $res = $db->query($db->getSpecialQuery('schema_x',* array('table' => 'table3')));*/return 'SELECT sql FROM (SELECT * FROM sqlite_master '. 'UNION ALL SELECT * FROM sqlite_temp_master) '. "WHERE tbl_name LIKE '{$args['table']}' ". "AND type!='meta' ". 'ORDER BY type DESC, name;';case 'alter':/** SQLite does not support ALTER TABLE; this is a helper query* to handle this. 'table' represents the table name, 'rows'* the news rows to create, 'save' the row(s) to keep _with_* the data.** Use like:* $args = array(* 'table' => $table,* 'rows' => "id INTEGER PRIMARY KEY, firstname TEXT, surname TEXT, datetime TEXT",* 'save' => "NULL, titel, content, datetime"* );* $res = $db->query( $db->getSpecialQuery('alter', $args));*/$rows = strtr($args['rows'], $this->keywords);$q = array('BEGIN TRANSACTION',"CREATE TEMPORARY TABLE {$args['table']}_backup ({$args['rows']})","INSERT INTO {$args['table']}_backup SELECT {$args['save']} FROM {$args['table']}","DROP TABLE {$args['table']}","CREATE TABLE {$args['table']} ({$args['rows']})","INSERT INTO {$args['table']} SELECT {$rows} FROM {$args['table']}_backup","DROP TABLE {$args['table']}_backup",'COMMIT',);/** This is a dirty hack, since the above query will not get* executed with a single query call so here the query method* will be called directly and return a select instead.*/foreach ($q as $query) {$this->query($query);}return "SELECT * FROM {$args['table']};";default:return null;}}// }}}}/** Local variables:* tab-width: 4* c-basic-offset: 4* End:*/?>