Hi, I have two php scripts, first one must pass arguments to second(the php script that will take more time to process for example inserting 1000000 records to db, data come from first script). I search around web and find below function: function execInBackground($path, $exe, $additional) { global $conf; if (file_exists($path . $exe)) { chdir($path); if (substr(php_uname(), 0, 7) == "Windows"){ echo 'going Windows'; pclose(popen("start \"bla\" \"" . $exe . "\" " . $additional, "r")); } else { exec("./" . $exe . " " . $additional . " > /dev/null &"); } } } But I don't know how to pass variables to the second file? and how to use of this function? in *windows* enviroment... and return value of second file to first.. Thanks in advance shahrzad