LogInfo("Returned a million search results"); //Prints to the log file $log->LogFatal("Oh dear."); //Prints to the log file $log->LogDebug("x = 5"); //Prints nothing due to priority setting */ class Logger { const DEBUG = 1; const INFO = 2; const WARN = 3; const ERROR = 4; const FATAL = 5; const OFF = 6; const LOG_OPEN = 1; const OPEN_FAILED = 2; const LOG_CLOSED = 3; var $Log_Status = Logger::LOG_CLOSED; var $DateFormat = "Y-m-d G:i:s"; var $MessageQueue; var $log_file; var $priority = Logger::INFO; var $file_handle; var $last_message; function __construct($filepath, $priority) { if($priority == Logger::OFF) return; $this->log_file = $filepath; $this->MessageQueue = array(); $this->priority = $priority; if(file_exists($this->log_file)) { if (!is_writable($this->log_file)) { $this->Log_Status = Logger::OPEN_FAILED; $this->MessageQueue[] = "The file exists, but could not be opened for writing. Check that appropriate permissions have been set."; trigger_error("The file exists, but could not be opened for writing. Check that appropriate permissions have been set.", E_USER_WARNING); return; } } if($this->file_handle = fopen($this->log_file, "a")) { $this->Log_Status = Logger::LOG_OPEN; $this->MessageQueue[] = "The log file was opened successfully."; } else { $this->Log_Status = Logger::OPEN_FAILED; $this->MessageQueue[] = "The file could not be opened. Check permissions."; trigger_error("The file could not be opened. Check permissions.", E_USER_WARNING); } return; } function __destruct() { if($this->file_handle) { fclose($this->file_handle); } } function GetLastMessage() { return $this->last_message; } function LogInfo($line) { $this->Log($line, Logger::INFO); } function LogDebug($line) { $this->Log($line, Logger::DEBUG); } function LogWarn($line) { $this->Log($line, Logger::WARN); } function LogError($line) { $this->Log($line, Logger::ERROR); } function LogFatal($line) { $this->Log($line, Logger::FATAL); } function Log($line, $priority) { if($this->priority <= $priority) { $status = $this->getTimeLine($priority); $this->WriteFreeFormLine("$status $line \n"); $this->last_message = $line; //print "
" . $line; } } function WriteFreeFormLine($line) { if($this->Log_Status == Logger::LOG_OPEN && $this->priority != Logger::OFF) { if(fwrite($this->file_handle, $line) === false) { $this->MessageQueue[] = "The file could not be written to. Check that appropriate permissions have been set."; trigger_error("The file could not be written to. Check that appropriate permissions have been set.", E_USER_WARNING); } } } function getTimeLine($level) { $time = date($this->DateFormat); switch($level) { case Logger::INFO: return "$time - INFO -"; case Logger::WARN: return "$time - WARN -"; case Logger::DEBUG: return "$time - DEBUG -"; case Logger::ERROR: return "$time - ERROR -"; case Logger::FATAL: return "$time - FATAL -"; default: return "$time - LOG -"; } } } ?>