classes/debug.php

   1 <?php
   2 class Debug {
   3     public static $LOG_NORMAL = 0;
   4     public static $LOG_VERBOSE = 1;
   5     public static $LOG_EXTENDED = 2;
   6
   7     private static $enabled = false;
   8     private static $quiet = false;
   9     private static $logfile = false;
  10     private static $loglevel = 0;
  11
  12     public static function set_logfile($logfile) {
  13         Debug::$logfile = $logfile;
  14     }
  15
  16     public static function enabled() {
  17         return Debug::$enabled;
  18     }
  19
  20     public static function set_enabled($enable) {
  21         Debug::$enabled = $enable;
  22     }
  23
  24     public static function set_quiet($quiet) {
  25         Debug::$quiet = $quiet;
  26     }
  27
  28     public static function set_loglevel($level) {
  29         Debug::$loglevel = $level;
  30     }
  31
  32     public static function get_loglevel() {
  33         return Debug::$loglevel;
  34     }
  35
  36     public static function log($message, $level = 0) {
  37
  38         if (!Debug::$enabled || Debug::$loglevel < $level) return false;
  39
  40         $ts = strftime("%H:%M:%S", time());
  41         if (function_exists('posix_getpid')) {
  42             $ts = "$ts/" . posix_getpid();
  43         }
  44
  45         if (Debug::$logfile) {
  46             $fp = fopen(Debug::$logfile, 'a+');
  47
  48             if ($fp) {
  49                 $locked = false;
  50
  51                 if (function_exists("flock")) {
  52                     $tries = 0;
  53
  54                     // try to lock logfile for writing
  55                     while ($tries < 5 && !$locked = flock($fp, LOCK_EX | LOCK_NB)) {
  56                         sleep(1);
  57                         ++$tries;
  58                     }
  59
  60                     if (!$locked) {
  61                         fclose($fp);
  62                         user_error("Unable to lock debugging log file: " . Debug::$logfile, E_USER_WARNING);
  63                         return;
  64                     }
  65                 }
  66
  67                 fputs($fp, "[$ts] $message\n");
  68
  69                 if (function_exists("flock")) {
  70                     flock($fp, LOCK_UN);
  71                 }
  72
  73                 fclose($fp);
  74
  75                 if (Debug::$quiet)
  76                     return;
  77
  78             } else {
  79                 user_error("Unable to open debugging log file: " . Debug::$logfile, E_USER_WARNING);
  80             }
  81         }
  82
  83         print "[$ts] $message\n";
  84     }
  85 }