Logger.php

<?php

namespace SimpleSAML;

/**
 * The main logger class for SimpleSAMLphp.
 *
 * @author Lasse Birnbaum Jensen, SDU.
 * @author Andreas Åkre Solberg, UNINETT AS. <andreas.solberg@uninett.no>
 * @author Jaime Pérez Crespo, UNINETT AS <jaime.perez@uninett.no>
 * @package SimpleSAMLphp
 */
class Logger
{
    /**
     * @var \SimpleSAML\Logger\LoggingHandlerInterface|false|null
     */
    private static $loggingHandler = null;

    /**
     * @var integer|null
     */
    private static $logLevel = null;

    /**
     * @var boolean
     */
    private static $captureLog = false;

    /**
     * @var array
     */
    private static $capturedLog = array();

    /**
     * Array with messages logged before the logging handler was initialized.
     *
     * @var array
     */
    private static $earlyLog = array();

    /**
     * List of log levels.
     *
     * This list is used to restore the log levels after some log levels have been disabled.
     *
     * @var array
     */
    private static $logLevelStack = array();

    /**
     * The current mask of log levels disabled.
     *
     * Note: this mask is not directly related to the PHP error reporting level.
     *
     * @var int
     */
    private static $logMask = 0;


    /**
     * This constant defines the string we set the track ID to while we are fetching the track ID from the session
     * class. This is used to prevent infinite recursion.
     */
    const NO_TRACKID = '_NOTRACKIDYET_';

    /**
     * This variable holds the track ID we have retrieved from the session class. It can also be NULL, in which case
     * we haven't fetched the track ID yet, or self::NO_TRACKID, which means that we are fetching the track ID now.
     */