<?php

function dltest ($filename=NULL) {
    Global $dltime_min,$dltime_sec;
    // $filesize = (filesize($filename)/1024);
    $filesize = 120012304 / 1024;
    $speeds = Array( 0.05,0.1,0.2,0.3,0.5,0.75,0.9,1,1.5,2,5,10,20); // MBps
    echo "Filesize: {$filesize} MB<br />The download will take:<br /> ";
    foreach($speeds as $kb){
        $kb *= 1024;
        $calc = $filesize/$kb;
        $dltime_min = round($calc / 60, 0);
        $dltime_sec = round($calc % 60, 0);
        if($kb > 1024){
            $unit = 'MBps';
            $kb /= 1024;
        }else{
            $unit = 'KBps';
        }
        echo $dltime_min . " minutes and " . $dltime_sec . " seconds. @ {$kb} {$unit}<br />";
    }
}
dltest();
?>