317 lines
8.9 KiB
PHP
317 lines
8.9 KiB
PHP
<?php
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/**
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* $Header$
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*
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* @version $Revision: 224513 $
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* @package Log
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*/
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/**
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* The Log_file class is a concrete implementation of the Log abstract
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* class that logs messages to a text file.
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*
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* @author Jon Parise <jon@php.net>
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* @author Roman Neuhauser <neuhauser@bellavista.cz>
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* @since Log 1.0
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* @package Log
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*
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* @example file.php Using the file handler.
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*/
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class Log_file extends Log
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{
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/**
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* String containing the name of the log file.
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* @var string
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* @access private
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*/
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var $_filename = 'php.log';
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/**
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* Handle to the log file.
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* @var resource
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* @access private
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*/
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var $_fp = false;
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/**
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* Should new log entries be append to an existing log file, or should the
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* a new log file overwrite an existing one?
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* @var boolean
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* @access private
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*/
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var $_append = true;
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/**
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* Should advisory file locking (i.e., flock()) be used?
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* @var boolean
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* @access private
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*/
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var $_locking = false;
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/**
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* Integer (in octal) containing the log file's permissions mode.
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* @var integer
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* @access private
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*/
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var $_mode = 0644;
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/**
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* Integer (in octal) specifying the file permission mode that will be
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* used when creating directories that do not already exist.
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* @var integer
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* @access private
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*/
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var $_dirmode = 0755;
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/**
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* String containing the format of a log line.
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* @var string
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* @access private
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*/
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var $_lineFormat = '%1$s %2$s [%3$s] %4$s';
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/**
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* String containing the timestamp format. It will be passed directly to
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* strftime(). Note that the timestamp string will generated using the
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* current locale.
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* @var string
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* @access private
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*/
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var $_timeFormat = '%b %d %H:%M:%S';
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/**
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* String containing the end-on-line character sequence.
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* @var string
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* @access private
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*/
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var $_eol = "\n";
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/**
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* Constructs a new Log_file object.
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*
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* @param string $name Ignored.
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* @param string $ident The identity string.
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* @param array $conf The configuration array.
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* @param int $level Log messages up to and including this level.
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* @access public
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*/
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function __construct($name, $ident = '', $conf = array(),
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$level = PEAR_LOG_DEBUG)
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{
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$this->_id = md5(microtime());
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$this->_filename = $name;
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$this->_ident = $ident;
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$this->_mask = Log::UPTO($level);
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if (isset($conf['append'])) {
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$this->_append = $conf['append'];
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}
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if (isset($conf['locking'])) {
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$this->_locking = $conf['locking'];
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}
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if (!empty($conf['mode'])) {
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if (is_string($conf['mode'])) {
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$this->_mode = octdec($conf['mode']);
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} else {
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$this->_mode = $conf['mode'];
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}
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}
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if (!empty($conf['dirmode'])) {
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if (is_string($conf['dirmode'])) {
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$this->_dirmode = octdec($conf['dirmode']);
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} else {
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$this->_dirmode = $conf['dirmode'];
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}
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}
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if (!empty($conf['lineFormat'])) {
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$this->_lineFormat = str_replace(array_keys($this->_formatMap),
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array_values($this->_formatMap),
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$conf['lineFormat']);
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}
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if (!empty($conf['timeFormat'])) {
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$this->_timeFormat = $conf['timeFormat'];
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}
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if (!empty($conf['eol'])) {
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$this->_eol = $conf['eol'];
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} else {
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$this->_eol = (strstr(PHP_OS, 'WIN')) ? "\r\n" : "\n";
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}
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register_shutdown_function(array(&$this, '_Log_file'));
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}
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/**
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* Destructor
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*/
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function _Log_file()
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{
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if ($this->_opened) {
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$this->close();
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}
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}
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/**
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* Creates the given directory path. If the parent directories don't
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* already exist, they will be created, too.
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*
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* This implementation is inspired by Python's os.makedirs function.
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*
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* @param string $path The full directory path to create.
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* @param integer $mode The permissions mode with which the
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* directories will be created.
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*
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* @return True if the full path is successfully created or already
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* exists.
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*
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* @access private
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*/
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function _mkpath($path, $mode = 0700)
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{
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/* Separate the last pathname component from the rest of the path. */
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$head = dirname($path);
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$tail = basename($path);
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/* Make sure we've split the path into two complete components. */
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if (empty($tail)) {
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$head = dirname($path);
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$tail = basename($path);
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}
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/* Recurse up the path if our current segment does not exist. */
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if (!empty($head) && !empty($tail) && !is_dir($head)) {
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$this->_mkpath($head, $mode);
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}
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/* Create this segment of the path. */
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return @mkdir($head, $mode);
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}
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/**
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* Opens the log file for output. If the specified log file does not
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* already exist, it will be created. By default, new log entries are
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* appended to the end of the log file.
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*
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* This is implicitly called by log(), if necessary.
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*
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* @access public
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*/
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function open()
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{
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if (!$this->_opened) {
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/* If the log file's directory doesn't exist, create it. */
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if (!is_dir(dirname($this->_filename))) {
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$this->_mkpath($this->_filename, $this->_dirmode);
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}
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/* Determine whether the log file needs to be created. */
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$creating = !file_exists($this->_filename);
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/* Obtain a handle to the log file. */
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$this->_fp = fopen($this->_filename, ($this->_append) ? 'a' : 'w');
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/* We consider the file "opened" if we have a valid file pointer. */
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$this->_opened = ($this->_fp !== false);
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/* Attempt to set the file's permissions if we just created it. */
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if ($creating && $this->_opened) {
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chmod($this->_filename, $this->_mode);
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}
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}
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return $this->_opened;
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}
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/**
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* Closes the log file if it is open.
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*
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* @access public
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*/
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function close()
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{
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/* If the log file is open, close it. */
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if ($this->_opened && fclose($this->_fp)) {
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$this->_opened = false;
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}
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return ($this->_opened === false);
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}
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/**
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* Flushes all pending data to the file handle.
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*
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* @access public
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* @since Log 1.8.2
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*/
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function flush()
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{
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if (is_resource($this->_fp)) {
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return fflush($this->_fp);
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}
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return false;
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}
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/**
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* Logs $message to the output window. The message is also passed along
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* to any Log_observer 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($priority)) {
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return false;
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}
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/* If the log file isn't already open, open it now. */
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if (!$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 string containing the complete log line. */
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$line = $this->_format($this->_lineFormat,
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strftime($this->_timeFormat),
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$priority, $message) . $this->_eol;
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/* If locking is enabled, acquire an exclusive lock on the file. */
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if ($this->_locking) {
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flock($this->_fp, LOCK_EX);
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}
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/* Write the log line to the log file. */
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$success = (fwrite($this->_fp, $line) !== false);
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/* Unlock the file now that we're finished writing to it. */
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if ($this->_locking) {
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flock($this->_fp, LOCK_UN);
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}
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/* Notify observers about this log message. */
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$this->_announce(array('priority' => $priority, 'message' => $message));
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return $success;
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}
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}
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