simplelog.php

function log($text)
{
    if(is_array($text) || is_object($text)){
        $text = http_build_query($text);
    }
    // open log file
    $filename = "mylog.txt";
    $fh = fopen($filename, "a") or die("Could not open log file.");
    fwrite($fh, date("d-m-Y, H:i")." - $text\n") or die("Could not write file!");
    fclose($fh);
}