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|
<?php
/**
* SAM storage implementation for PHP's PEAR database abstraction layer.
*
* Required parameters:<pre>
* 'phptype' The database type (ie. 'pgsql', 'mysql', etc.).</pre>
*
* Optional preferences:<pre>
* 'table' The name of the SAM options table in 'database'.
* DEFAULT: 'userpref'</pre>
*
* Required by some database implementations:<pre>
* 'hostspec' The hostname of the database server.
* 'protocol' The communication protocol ('tcp', 'unix', etc.).
* 'database' The name of the database.
* 'username' The username with which to connect to the database.
* 'password' The password associated with 'username'.
* 'options ' Additional options to pass to the database.
* 'port' The port on which to connect to the database.
* 'tty' The TTY on which to connect to the database.</pre>
*
* The table structure can be created by the scripts/sql/amavisd_*.sql
* script appropriate for your database, or modified from one that is
* available.
*
* $Horde: sam/lib/Driver/amavisd_sql.php,v 1.20 2006/01/18 17:49:02 ben Exp $
*
* @author Max Kalika <max@horde.org>
* @since SAM 0.0.1
* @package Sam
*/
/**
* Backend-specific 'false' value.
*/
define('_SAM_OPTION_OFF', 'N');
/**
* Backend-specific 'true' value.
*/
define('_SAM_OPTION_ON', 'Y');
class SAM_Driver_amavisd_sql extends SAM_Driver {
/**
* Handle for the current database connection.
*
* @var DB
*/
var $_db;
/**
* Boolean indicating whether or not we're connected to the SQL server.
*
* @var boolean
*/
var $_connected = false;
/**
* List of the capabilities supported by this driver.
*
* @var array
*/
var $_capabilities = array('tag_level',
'hit_level',
'kill_level',
'rewrite_sub',
'spam_extension',
'virus_extension',
'banned_extension',
'spam_quarantine',
'allow_virus',
'allow_spam',
'allow_banned',
'allow_header',
'skip_virus',
'skip_spam',
'skip_banned',
'skip_header',
'whitelist_from',
'blacklist_from');
/**
* Constructs a new SQL storage object.
*
* @param string $user The user who owns these SPAM options.
* @param array $params A hash containing connection parameters.
*/
function SAM_Driver_amavisd_sql($user, $params = array())
{
global $conf;
$this->_user = $user;
$this->_params = array_merge($conf['sql'], $params);
}
/**
* Converts a SAM table name to a table name that Amavisd-new will use.
*
* @access private
*
* @param string $table The SAM table to lookup.
*
* @return string The converted Amavisd-new table or the original name if
* no match is found.
*/
function _mapNameToTable($table)
{
return isset($this->_params['table_map'][$table]['name'])
? $this->_params['table_map'][$table]['name'] : $table;
}
/**
* Converts a SAM attribute from a specific table to a field that
* Amavisd-new will use.
*
* @access private
*
* @param string $table The SAM table to lookup.
* @param string $attribute The SAM attribute to convert.
*
* @return string The converted Amavisd-new field or the original
* attribute if no match is found.
*/
function _mapAttributeToField($table, $attribute)
{
return isset($this->_params['table_map'][$table]['field_map'][$attribute])
? $this->_params['table_map'][$table]['field_map'][$attribute] : $attribute;
}
/**
* Converts a Amavisd-new field from a specific table to a SAM attribute.
*
* @access private
*
* @param string $table The SAM table to lookup.
* @param string $field The Amavisd-new field to convert.
*
* @return string The converted SAM attribute or the original field if no
* match is found.
*/
function _mapFieldToAttribute($table, $field)
{
$attribute_map = array();
if (isset($this->_params['table_map'][$table]['field_map'])) {
$attribute_map = array_flip($this->_params['table_map'][$table]['field_map']);
}
return isset($attribute_map[$field]) ? $attribute_map[$field] : $field;
}
/*
* Create an Amavisd-new recipient for policy, whitelist and blacklist
* storage and retrieval.
*
* @access private
*
* @return mixed The id of the newly created recipient or a PEAR_Error
* object on failure.
*/
function _createUserID()
{
/* Make sure we have a valid database connection. */
$this->_connect();
/* Build the recipient creation query. */
$query = sprintf('INSERT INTO %s (%s) VALUES (?)',
$this->_mapNameToTable('recipients'),
$this->_mapAttributeToField('recipients', 'email'));
$values = array($this->_user);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_createUserID(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$result = $this->_db->query($query, $values);
if (is_a($result, 'PEAR_Error')) {
return PEAR::raiseError(sprintf(_("Cannot create recipient %s: %s"),
$this->_user, $result->getMessage()));
} else {
$GLOBALS['notification']->push(sprintf(_("Recipient created: %s"),
$this->_user), 'horde.success');
return $this->_lookupUserID();
}
}
/*
* Lookup an Amavisd-new recipient for policy, whitelist and blacklist
* storage and retrieval.
*
* This function will cache the found ID for quicker lookup on subsequent
* calls.
*
* @access private
*
* @return mixed The ID of the found or newly created recipient or a
* PEAR_Error object on failure.
*/
function _lookupUserID()
{
static $_userID;
if (!empty($_userID)) {
return $_userID;
}
/* Make sure we have a valid database connection. */
$this->_connect();
/* Build the recipient lookup query. */
$query = sprintf('SELECT %s FROM %s WHERE %s = ?',
$this->_mapAttributeToField('recipients', 'id'),
$this->_mapNameToTable('recipients'),
$this->_mapAttributeToField('recipients', 'email'));
$values = array($this->_user);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_lookupUserID(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
/* Execute the query. */
$result = $this->_db->getOne($query, $values);
if (is_a($result, 'PEAR_Error')) {
Horde::logMessage($result, __FILE__, __LINE__, PEAR_LOG_ERR);
return $result;
} elseif (is_null($result)) {
$_userID = $this->_createUserID();
} else {
$_userID = $result;
}
return $_userID;
}
/*
* Lookup an Amavisd-new policy for storage and retrieval.
*
* @access private
*
* @return mixed The results of the of the policy lookup. Can be the ID of
* the policy, null if not found, or a PEAR_Error object on
* failure.
*/
function _lookupPolicyID()
{
/* Make sure we have a valid database connection. */
$this->_connect();
/* Build the policy lookup query. */
$query = sprintf('SELECT %s FROM %s WHERE %s = ?',
$this->_mapAttributeToField('policies', 'id'),
$this->_mapNameToTable('policies'),
$this->_mapAttributeToField('policies', 'name'));
$values = array($this->_user);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_lookupPolicyID(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
/* Execute the query. */
$result = $this->_db->getOne($query, $values);
if (is_a($result, 'PEAR_Error')) {
Horde::logMessage($result, __FILE__, __LINE__, PEAR_LOG_ERR);
}
return $result;
}
/**
* Retrieve an option set from the storage backend.
*
* @access private
*
* @return mixed Array of field-value pairs or a PEAR_Error object on
* failure.
*/
function _retrieve()
{
/* Make sure we have a valid database connection. */
$this->_connect();
/* Find the user id. */
$userID = $this->_lookupUserID();
if (is_a($userID, 'PEAR_Error')) {
return $userID;
}
/* Find the policy id. */
$policyID = $this->_lookupPolicyID();
if (is_a($policyID, 'PEAR_Error')) {
return $policyID;
}
$return = array();
/* Build the SQL query for SPAM policy. */
$query = sprintf('SELECT * FROM %s WHERE %s = ?',
$this->_mapNameToTable('policies'),
$this->_mapAttributeToField('policies', 'id'));
$values = array($policyID);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_retrieve(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
/* Execute the query. */
$result = $this->_db->getRow($query, $values, DB_FETCHMODE_ASSOC);
if (is_a($result, 'PEAR_Error')) {
Horde::logMessage($result, __FILE__, __LINE__, PEAR_LOG_ERR);
return $result;
}
/* Loop through elements of the result, retrieving options. */
if (!is_null($result)) {
foreach ($result as $field => $value) {
$attribute = $this->_mapFieldToAttribute('policies', $field);
if ($this->hasCapability($attribute) && !is_null($value)) {
$return[$attribute] = $value;
}
}
}
/* Build the SQL query for whitelists and blacklists. */
$query = sprintf('SELECT %s, %s FROM %s WHERE %s = ?',
$this->_mapAttributeToField('wblists', 'sender'),
$this->_mapAttributeToField('wblists', 'type'),
$this->_mapNameToTable('wblists'),
$this->_mapAttributeToField('wblists', 'recipient'));
$values = array($userID);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_retrieve(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$result = $this->_db->query($query, $values);
if (is_a($result, 'PEAR_Error')) {
Horde::logMessage($result, __FILE__, __LINE__, PEAR_LOG_ERR);
return $result;
}
/* Loop through results, retrieving whitelists and blacklists. */
while (($row = $result->fetchRow(DB_FETCHMODE_ASSOC)) &&
!is_a($row, 'PEAR_Error')) {
$type = $row[$this->_mapAttributeToField('wblists', 'type')];
$senderID = $row[$this->_mapAttributeToField('wblists', 'sender')];
/* Only proceed if sender is listed white or black. */
if (preg_match('/[WYBN]/i', $type)) {
$query = sprintf('SELECT %s FROM %s WHERE %s = ?',
$this->_mapAttributeToField('senders', 'email'),
$this->_mapNameToTable('senders'),
$this->_mapAttributeToField('senders', 'id'));
$values = array($senderID);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_retrieve(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$sender = $this->_db->getOne($query, $values);
if (is_a($sender, 'PEAR_Error')) {
Horde::logMessage($sender, __FILE__, __LINE__, PEAR_LOG_ERR);
return $sender;
} else {
$list = preg_match('/[WY]/i', $type) ? 'whitelist_from' : 'blacklist_from';
if (isset($return[$list])) {
if (!in_array($sender, $return[$list])) {
$return[$list][] = $sender;
}
} else {
$return[$list] = array($sender);
}
}
}
}
$result->free();
if (is_a($row, 'PEAR_Error')) {
Horde::logMessage($row, __FILE__, __LINE__, PEAR_LOG_ERR);
return $row;
}
return $return;
}
/**
* Retrieves the user options and stores them in the member array.
*
* @return mixed True on success or a PEAR_Error object on failure.
*/
function retrieve()
{
$options = $this->_retrieve();
if (!is_a($options, 'PEAR_Error')) {
$this->_options = $options;
} else {
return $options;
}
return true;
}
/**
* Store an option set from the member array to the storage backend.
*
* @access private
*
* @return mixed True on success or a PEAR_Error object on failure.
*/
function _store()
{
/* Make sure we have a valid database connection. */
$this->_connect();
/* Check if the policy already exists. */
$policyID = $this->_lookupPolicyID();
if (is_a($policyID, 'PEAR_Error')) {
return $policyID;
}
/* Delete existing policy. */
if (!is_null($policyID)) {
$query = sprintf('DELETE FROM %s WHERE %s = ?',
$this->_mapNameToTable('policies'),
$this->_mapAttributeToField('policies', 'name'));
$values = array($this->_user);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_store(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$result = $this->_db->query($query, $values);
if (is_a($result, 'PEAR_Error')) {
Horde::logMessage($result, __FILE__, __LINE__, PEAR_LOG_ERR);
return $result;
}
}
/* Insert new policy (everything but whitelists and blacklists). */
$insertKeys = $insertVals = array();
foreach ($this->_options as $attribute => $value) {
if ($attribute != 'whitelist_from' && $attribute != 'blacklist_from') {
$insertKeys[] = $this->_mapAttributeToField('policies', $attribute);
$insertVals[] = $value;
}
}
if (count($insertKeys)) {
$query = sprintf('INSERT INTO %s (%s, %s) VALUES (%s)',
$this->_mapNameToTable('policies'),
$this->_mapAttributeToField('policies', 'name'),
implode(', ', $insertKeys),
implode(', ', array_fill(0, count($insertVals) + 1, '?')));
$values = array_merge(array($this->_user), $insertVals);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_store(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$result = $this->_db->query($query, $values);
if (is_a($result, 'PEAR_Error')) {
Horde::logMessage($result, __FILE__, __LINE__, PEAR_LOG_ERR);
return $result;
}
}
/* Get the new policy id for the recipients table. */
$policyID = $this->_lookupPolicyID();
if (is_a($policyID, 'PEAR_Error')) {
return $policyID;
}
/* Update recipients with new policy id. */
$query = sprintf('UPDATE %s SET %s = ? WHERE %s = ?',
$this->_mapNameToTable('recipients'),
$this->_mapAttributeToField('recipients', 'policy_id'),
$this->_mapAttributeToField('recipients', 'email'));
$values = array($policyID, $this->_user);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_store(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$result = $this->_db->query($query, $values);
if (is_a($result, 'PEAR_Error')) {
Horde::logMessage($result, __FILE__, __LINE__, PEAR_LOG_ERR);
return $result;
}
/* Find the user id. */
$userID = $this->_lookupUserID();
if (is_a($userID, 'PEAR_Error')) {
return $userID;
}
$existing = array('whitelist_from' => array(), 'blacklist_from' => array());
/* Build the SQL query for whitelists and blacklists. */
$query = sprintf('SELECT %s, %s FROM %s WHERE %s = ?',
$this->_mapAttributeToField('wblists', 'sender'),
$this->_mapAttributeToField('wblists', 'type'),
$this->_mapNameToTable('wblists'),
$this->_mapAttributeToField('wblists', 'recipient'));
$values = array($userID);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_store(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$result = $this->_db->query($query, $values);
if (is_a($result, 'PEAR_Error')) {
Horde::logMessage($result, __FILE__, __LINE__, PEAR_LOG_ERR);
return $result;
}
/* Loop through results, retrieving whitelists and blacklists. */
while (($row = $result->fetchRow(DB_FETCHMODE_ASSOC)) &&
!is_a($row, 'PEAR_Error')) {
$type = $row[$this->_mapAttributeToField('wblists', 'type')];
$senderID = $row[$this->_mapAttributeToField('wblists', 'sender')];
/* Only proceed if sender is listed white or black. */
if (preg_match('/[WYBN]/i', $type)) {
$query = sprintf('SELECT %s FROM %s WHERE %s = ?',
$this->_mapAttributeToField('senders', 'email'),
$this->_mapNameToTable('senders'),
$this->_mapAttributeToField('senders', 'id'));
$values = array($senderID);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_store(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$sender = $this->_db->getOne($query, $values);
if (is_a($sender, 'PEAR_Error')) {
Horde::logMessage($sender, __FILE__, __LINE__, PEAR_LOG_ERR);
return $sender;
} else {
$list = preg_match('/[WY]/i', $type) ? 'whitelist_from' : 'blacklist_from';
/* User removed an address from a list. */
if (!isset($this->_options[$list]) || !in_array($sender, $this->_options[$list])) {
$query = sprintf('DELETE FROM %s WHERE %s = ? AND %s = ?',
$this->_mapNameToTable('wblists'),
$this->_mapAttributeToField('wblists', 'sender'),
$this->_mapAttributeToField('wblists', 'recipient'));
$values = array($senderID, $userID);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_store(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$deleted = $this->_db->query($query, $values);
if (is_a($deleted, 'PEAR_Error')) {
Horde::logMessage($deleted, __FILE__, __LINE__, PEAR_LOG_ERR);
return $deleted;
}
/* Check if there is anyone else using this sender
* address. */
$query = sprintf('SELECT 1 FROM %s WHERE %s = ?',
$this->_mapNameToTable('wblists'),
$this->_mapAttributeToField('wblists', 'sender'));
$values = array($senderID);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_store(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
/* No one else needs this sender address, delete it
* from senders table. */
if (is_null($this->_db->getOne($query, $values))) {
$query = sprintf('DELETE FROM %s WHERE %s = ?',
$this->_mapNameToTable('senders'),
$this->_mapAttributeToField('senders', 'id'));
$values = array($senderID);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_store(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$deleted = $this->_db->query($query, $values);
if (is_a($deleted, 'PEAR_Error')) {
Horde::logMessage($deleted, __FILE__, __LINE__, PEAR_LOG_ERR);
return $deleted;
}
}
} else {
$existing[$list][] = $sender;
}
}
}
}
$result->free();
if (is_a($row, 'PEAR_Error')) {
Horde::logMessage($row, __FILE__, __LINE__, PEAR_LOG_ERR);
return $row;
}
/* Check any additions to the lists. */
foreach (array('whitelist_from' => 'W', 'blacklist_from' => 'B') as $list => $type) {
if (isset($this->_options[$list])) {
foreach ($this->_options[$list] as $sender) {
if (!in_array($sender, $existing[$list])) {
/* Check if this sender address exists already. */
$query = sprintf('SELECT %s FROM %s WHERE %s = ?',
$this->_mapAttributeToField('senders', 'id'),
$this->_mapNameToTable('senders'),
$this->_mapAttributeToField('senders', 'email'));
$values = array($sender);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_store(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$wb_result = $this->_db->getOne($query, $values);
if (is_null($wb_result)) {
/* Address doesn't exist, add it. */
$query = sprintf('INSERT INTO %s (%s) VALUES (?)',
$this->_mapNameToTable('senders'),
$this->_mapAttributeToField('senders', 'email'));
$values = array($sender);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_store(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$result = $this->_db->query($query, $values);
if (is_a($result, 'PEAR_Error')) {
Horde::logMessage($result, __FILE__, __LINE__, PEAR_LOG_ERR);
return $result;
}
$query = sprintf('SELECT %s FROM %s WHERE %s = ?',
$this->_mapAttributeToField('senders', 'id'),
$this->_mapNameToTable('senders'),
$this->_mapAttributeToField('senders', 'email'));
$values = array($sender);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_store(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$senderID = $this->_db->getOne($query, $values);
if (is_a($senderID, 'PEAR_Error')) {
Horde::logMessage($senderID, __FILE__, __LINE__, PEAR_LOG_ERR);
return $senderID;
}
$query = sprintf('INSERT INTO %s (%s, %s, %s) VALUES (?, ?, ?)',
$this->_mapNameToTable('wblists'),
$this->_mapAttributeToField('wblists', 'recipient'),
$this->_mapAttributeToField('wblists', 'sender'),
$this->_mapAttributeToField('wblists', 'type'));
$values = array($userID, $senderID, $type);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_store(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$result = $this->_db->query($query, $values);
if (is_a($result, 'PEAR_Error')) {
Horde::logMessage($result, __FILE__, __LINE__, PEAR_LOG_ERR);
return $result;
}
} else {
/* Address exists, use it's ID */
$query = sprintf('INSERT INTO %s (%s, %s, %s) VALUES (?, ?, ?)',
$this->_mapNameToTable('wblists'),
$this->_mapAttributeToField('wblists', 'recipient'),
$this->_mapAttributeToField('wblists', 'sender'),
$this->_mapAttributeToField('wblists', 'type'));
$values = array($userID, $wb_result, $type);
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_store(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$result = $this->_db->query($query, $values);
if (is_a($result, 'PEAR_Error')) {
Horde::logMessage($result, __FILE__, __LINE__, PEAR_LOG_ERR);
return $result;
}
}
}
}
}
}
/* Remove any disjoined sender IDs. */
$query = sprintf('DELETE FROM %s WHERE %s = ?',
$this->_mapNameToTable('wblists'),
$this->_mapAttributeToField('wblists', 'recipient'));
$values = array('');
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SAM_Driver_amavisd_sql::_store(): %s', $query),
__FILE__, __LINE__, PEAR_LOG_DEBUG);
$result = $this->_db->query($query, $values);
if (is_a($result, 'PEAR_Error')) {
Horde::logMessage($result, __FILE__, __LINE__, PEAR_LOG_ERR);
return $result;
}
return true;
}
/**
* Stores the user options from the member array.
*
* @return mixed True on success or a PEAR_Error object on failure.
*/
function store()
{
return $this->_store();
}
/**
* Attempts to open a persistent connection to the SQL server.
*
* @access private
*
* @return mixed True on success or a PEAR_Error object on failure.
*/
function _connect()
{
if (!$this->_connected) {
Horde::assertDriverConfig($this->_params, 'amavisd_sql',
array('phptype'),
'SAM backend', 'backends.php', '$backends');
if (!isset($this->_params['table'])) {
$this->_params['table'] = 'userpref';
}
if (!isset($this->_params['database'])) {
$this->_params['database'] = '';
}
if (!isset($this->_params['username'])) {
$this->_params['username'] = '';
}
if (!isset($this->_params['hostspec'])) {
$this->_params['hostspec'] = '';
}
/* Connect to the SQL server using the supplied parameters. */
require_once 'DB.php';
$this->_db = &DB::connect($this->_params,
array('persistent' => !empty($this->_params['persistent'])));
if (is_a($this->_db, 'PEAR_Error')) {
Horde::fatal($this->_db, __FILE__, __LINE__);
}
// Set DB portability options.
switch ($this->_db->phptype) {
case 'mssql':
$this->_db->setOption('portability', DB_PORTABILITY_LOWERCASE | DB_PORTABILITY_ERRORS | DB_PORTABILITY_RTRIM);
break;
default:
$this->_db->setOption('portability', DB_PORTABILITY_LOWERCASE | DB_PORTABILITY_ERRORS);
}
$this->_connected = true;
}
return true;
}
/**
* Disconnect from the SQL server and clean up the connection.
*
* @return boolean True on success, false on failure.
*/
function _disconnect()
{
if ($this->_connected) {
$this->_connected = false;
return $this->_db->disconnect();
}
return true;
}
}
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