add maximum level of logging to write to logs

Logger.php

@@ -20,6 +20,14 @@ class Logger
     private $log_handle = null; // Handle to the default log file.
     private $_user_log_handle = null; // Handle to the developer specified log file.
 
+    private static $log_level = null; // The maximum level of logging to write to logs
+    private static $log_level_integers = [
+        'debug' => 8,
+        'info' => 7,
+        'warn' => 5,
+        'error' => 4
+    ]; // Map logging levels to syslog specifications, there's room for the other levels
+
     /**
      *  This method checks if there is an instance available. If yes it returns its handle otherwise
      *  create a new instance and return it's handle.
@@ -32,8 +40,9 @@ class Logger
      *
      *     @static
      * */
-    public static function get_logger($log_path = null, $log_file = null)
+    public static function get_logger($log_path = null, $log_file = null, $log_level = 'debug')
     {
+        self::$log_level = ($log_level == 'warning') ? 'warn' : $log_level;
         if (is_null($log_path)) {
             if (!(isset(self::$logger)) || (is_null(self::$logger))) {
                 self::$logger = new self();
@@ -160,6 +169,9 @@ class Logger
      * */
     public function do_write($log_string, $log_source, $log_level = 'debug')
     {
+        if (self::$log_level_integers[$log_level] > self::$log_level_integers[self::$log_level]){
+            return;
+        }
         $log_string = sprintf("%s [%s] %s -- %s", date(DATESTRING_FULL),  str_pad(strtoupper($log_level), 5), $log_string, $log_source);
         $log_string = $log_string . PHP_EOL;