syslog.php

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<?php
class Log_syslog extends Log
{
    var $_name = LOG_SYSLOG;

    var $_inherit = false;

    function Log_syslog($name, $ident = '', $conf = array(),
                        $level = PEAR_LOG_DEBUG)
    {
        /* Ensure we have a valid integer value for $name. */
        if (empty($name) || !is_int($name)) {
            $name = LOG_SYSLOG;
        }

        if (isset($conf['inherit'])) {
            $this->_inherit = $conf['inherit'];
            $this->_opened = $this->_inherit;
        }

        $this->_id = md5(microtime());
        $this->_name = $name;
        $this->_ident = $ident;
        $this->_mask = Log::UPTO($level);
    }

    function open()
    {
        if (!$this->_opened) {
            $this->_opened = openlog($this->_ident, LOG_PID, $this->_name);
        }

        return $this->_opened;
    }

    function close()
    {
        if ($this->_opened && !$this->_inherit) {
            closelog();
            $this->_opened = false;
        }

        return true;
    }

    function log($message, $priority = null)
    {
        /* If a priority hasn't been specified, use the default value. */
        if ($priority === null) {
            $priority = $this->_priority;
        }

        /* Abort early if the priority is above the maximum logging level. */
        if (!$this->_isMasked($priority)) {
            return false;
        }

        /* If the connection isn't open and can't be opened, return failure. */
        if (!$this->_opened && !$this->open()) {
            return false;
        }

        /* Extract the string representation of the message. */
        $message = $this->_extractMessage($message);

        /* Build a syslog priority value based on our current configuration. */
        $priority = $this->_toSyslog($priority);
        if ($this->_inherit) {
            $priority |= $this->_name;
        }

        if (!syslog($priority, $message)) {
            return false;
        }

        $this->_announce(array('priority' => $priority, 'message' => $message));

        return true;
    }

    function _toSyslog($priority)
    {
        static $priorities = array(
            PEAR_LOG_EMERG   => LOG_EMERG,
            PEAR_LOG_ALERT   => LOG_ALERT,
            PEAR_LOG_CRIT    => LOG_CRIT,
            PEAR_LOG_ERR     => LOG_ERR,
            PEAR_LOG_WARNING => LOG_WARNING,
            PEAR_LOG_NOTICE  => LOG_NOTICE,
            PEAR_LOG_INFO    => LOG_INFO,
            PEAR_LOG_DEBUG   => LOG_DEBUG
        );

        /* If we're passed an unknown priority, default to LOG_INFO. */
        if (!is_int($priority) || !in_array($priority, $priorities)) {
            return LOG_INFO;
        }

        return $priorities[$priority];
    }

}