add log with addtional arguments

Logger.php

@@ -86,7 +86,14 @@ class Logger
     public function log($string)
     {
         $log_source = sprintf("%s:%d", basename(debug_backtrace()[0]['file']), debug_backtrace()[0]['line']);
-        $this->do_write($string, $log_source);
+        $args = func_get_args();
+        if (count($args) > 1) {
+            array_shift($args);
+            $log_string = vsprintf($string, $args);
+        } else {
+            $log_string = $string;
+        }
+        $this->do_write($log_string, $log_source);
     }
 
     /*

example.php

@@ -8,3 +8,4 @@ require_once 'Logger.php';
 /* Define log path and log filename */
 $logger = Logger::get_logger('./logs', 'my-log');
 $logger->log("set log path and filename");
+$logger->log("log with addtional arguments: %s, %s", "msg1", "msg2");