239 Zeilen
7.9 KiB
PHP
239 Zeilen
7.9 KiB
PHP
<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4: */
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// +----------------------------------------------------------------------+
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// | PHP version 4.0 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2004 The PHP Group |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 2.0 of the PHP license, |
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// | that is bundled with this package in the file LICENSE, and is |
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// | available at through the world-wide-web at |
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// | http://www.php.net/license/2_02.txt. |
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// | If you did not receive a copy of the PHP license and are unable to |
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// | obtain it through the world-wide-web, please send a note to |
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// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Authors: Bertrand Mansion <bmansion@mamasam.com> |
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// +----------------------------------------------------------------------+
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//
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// $Id$
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/**
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* The Log_sqlite class is a concrete implementation of the Log::
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* abstract class which sends messages to an Sqlite database.
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* Each entry occupies a separate row in the database.
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*
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* This implementation uses PHP native Sqlite functions.
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*
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* CREATE TABLE log_table (
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* id INTEGER PRIMARY KEY NOT NULL,
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* logtime NOT NULL,
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* ident CHAR(16) NOT NULL,
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* priority INT NOT NULL,
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* message
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* );
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*
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* @author Bertrand Mansion <bmansion@mamasam.com>
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* @author Jon Parise <jon@php.net>
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* @since Log 1.8.3
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* @package Log
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*
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* @example sqlite.php Using the Sqlite handler.
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*/
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class Log_sqlite extends Log
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{
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/**
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* Array containing the connection defaults
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* @var array
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* @access private
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*/
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var $_options = array('mode' => 0666,
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'persistent' => false);
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/**
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* Object holding the database handle.
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* @var object
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* @access private
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*/
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var $_db = null;
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/**
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* Flag indicating that we're using an existing database connection.
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* @var boolean
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* @access private
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*/
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var $_existingConnection = false;
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/**
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* String holding the database table to use.
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* @var string
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* @access private
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*/
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var $_table = 'log_table';
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/**
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* Constructs a new sql logging object.
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*
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* @param string $name The target SQL table.
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* @param string $ident The identification field.
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* @param mixed $conf Can be an array of configuration options used
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* to open a new database connection
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* or an already opened sqlite connection.
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* @param int $level Log messages up to and including this level.
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* @access public
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*/
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function Log_sqlite($name, $ident = '', &$conf, $level = PEAR_LOG_DEBUG)
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{
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$this->_id = md5(microtime());
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$this->_table = $name;
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$this->_ident = $ident;
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$this->_mask = Log::UPTO($level);
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if (is_array($conf)) {
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foreach ($conf as $k => $opt) {
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$this->_options[$k] = $opt;
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}
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} else {
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// If an existing database connection was provided, use it.
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$this->_db =& $conf;
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$this->_existingConnection = true;
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}
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}
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/**
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* Opens a connection to the database, if it has not already
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* been opened. This is implicitly called by log(), if necessary.
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*
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* @return boolean True on success, false on failure.
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* @access public
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*/
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function open()
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{
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if (is_resource($this->_db)) {
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$this->_opened = true;
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return $this->_createTable();
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} else {
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/* Set the connection function based on the 'persistent' option. */
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if (empty($this->_options['persistent'])) {
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$connectFunction = 'sqlite_open';
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} else {
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$connectFunction = 'sqlite_popen';
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}
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/* Attempt to connect to the database. */
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if ($this->_db = $connectFunction($this->_options['filename'],
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(int)$this->_options['mode'],
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$error)) {
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$this->_opened = true;
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return $this->_createTable();
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}
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}
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return $this->_opened;
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}
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/**
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* Closes the connection to the database if it is still open and we were
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* the ones that opened it. It is the caller's responsible to close an
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* existing connection that was passed to us via $conf['db'].
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*
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* @return boolean True on success, false on failure.
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* @access public
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*/
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function close()
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{
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/* We never close existing connections. */
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if ($this->_existingConnection) {
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return false;
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}
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if ($this->_opened) {
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$this->_opened = false;
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sqlite_close($this->_db);
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}
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return ($this->_opened === false);
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}
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/**
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* Inserts $message to the currently open database. Calls open(),
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* if necessary. Also passes the message along to any Log_observer
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* instances that are observing this Log.
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*
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* @param mixed $message String or object containing the message to log.
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* @param string $priority The priority of the message. Valid
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* values are: PEAR_LOG_EMERG, PEAR_LOG_ALERT,
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* PEAR_LOG_CRIT, PEAR_LOG_ERR, PEAR_LOG_WARNING,
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* PEAR_LOG_NOTICE, PEAR_LOG_INFO, and PEAR_LOG_DEBUG.
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* @return boolean True on success or false on failure.
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* @access public
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*/
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function log($message, $priority = null)
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{
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/* If a priority hasn't been specified, use the default value. */
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if ($priority === null) {
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$priority = $this->_priority;
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}
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/* Abort early if the priority is above the maximum logging level. */
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if (!$this->_isMasked($priority)) {
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return false;
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}
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/* If the connection isn't open and can't be opened, return failure. */
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if (!$this->_opened && !$this->open()) {
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return false;
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}
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// Extract the string representation of the message.
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$message = $this->_extractMessage($message);
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// Build the SQL query for this log entry insertion.
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$q = sprintf('INSERT INTO [%s] (logtime, ident, priority, message) ' .
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"VALUES ('%s', '%s', %d, '%s')",
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$this->_table,
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strftime('%Y-%m-%d %H:%M:%S', time()),
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sqlite_escape_string($this->_ident),
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$priority,
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sqlite_escape_string($message));
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if (!($res = @sqlite_unbuffered_query($this->_db, $q))) {
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return false;
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}
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$this->_announce(array('priority' => $priority, 'message' => $message));
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return true;
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}
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/**
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* Checks whether the log table exists and creates it if necessary.
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*
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* @return boolean True on success or false on failure.
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* @access private
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*/
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function _createTable()
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{
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$q = "SELECT name FROM sqlite_master WHERE name='" . $this->_table .
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"' AND type='table'";
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$res = sqlite_query($this->_db, $q);
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if (sqlite_num_rows($res) == 0) {
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$q = 'CREATE TABLE [' . $this->_table . '] (' .
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'id INTEGER PRIMARY KEY NOT NULL, ' .
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'logtime NOT NULL, ' .
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'ident CHAR(16) NOT NULL, ' .
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'priority INT NOT NULL, ' .
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'message)';
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if (!($res = sqlite_unbuffered_query($this->_db, $q))) {
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return false;
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}
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}
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return true;
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}
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}
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?>
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