Simple WP Logging plugin.

Burst_Logger.php

<?php

// No trailing slash
define('BURST_LOG_PATH', ABSPATH . 'wp-content');

// Define which get logged in Burst::$_burst_log_levels
define('BURST_INFO',     1);
define('BURST_DEBUG',    2);
define('BURST_CRITICAL', 3);

if (!class_exists('Burst')) {
  class Burst {

    protected static $_burst_log_levels = array(BURST_INFO,
						BURST_DEBUG,
						BURST_CRITICAL);

    protected static $_default_log_file = 'burst.log';
    
    public static function log($message, $level=BURST_DEBUG, $file=null, $force=false) {
      if (!in_array($level, self::$_burst_log_levels) && $force == false) {
	return false;
      } else {
	$filename = ($file === null) ? self::$_default_log_file : $file;
	$filename = BURST_LOG_PATH . '/' . $filename;

	$log_level_phrase = ($level == 1) ? "INFO " : (($level == 2) ? "DEBUG" : "CRIT ");

	// print_r if message is an object or array
	$message = (is_array($message) || is_object($message)) ? print_r($message, true) : $message;
	
	$formatted_message = sprintf('%s  %s (%d): %s', 
				     date('c')         /* Timestamp */, 
				     $log_level_phrase /* Log Level Phrase */,
				     (int) $level      /* Log Level Number */,
				     $message          /* Log Message */) . PHP_EOL;

	$file_write = @file_put_contents($filename, $formatted_message, FILE_APPEND);

	if ($file_write === false) {
	  return false;
	} else {
	  return true;
	}
      }
    }

    public static function log_environment($level=BURST_DEBUG, $file='burst.env.log') {
      self::log(json_encode($_SERVER), $level, $file);
      self::log(json_encode($_REQUEST), $level, $file);
    }
  }
}