<?php
$download_url = "https://www.yourdomain.co.uk/10mb-test-file";
$download_size_mb = 10;
$upload_url = "https://www.yourdomain.co.uk/acceptupload.php";
$upload_size_mb = 4;
$file_to_upload = "/tmp/4mb-test-file";

while(true) {
        $time_start = microtime(true);
        $data = file_get_contents($download_url);
        $time_end = microtime(true);
        $download_time = $time_end - $time_start;
        echo date("Y-m-d H:i:s")."\t";
        echo "DOWN\t$download_size_mb\t";
        echo $download_time."\t";
        echo ($download_size_mb/$download_time)."\n";

        $time_start = microtime(true);
        $cFile = curl_file_create($file_to_upload);
        $post = array('upload_file'=>$cFile);
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL,$upload_url);
        curl_setopt($ch, CURLOPT_POST,1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $result=curl_exec ($ch);
        curl_close ($ch);

        echo date("Y-m-d H:i:s")."\t";
        echo "UP\t$upload_size_mb\t";
        if($result == "OK") {
                $time_end = microtime(true);
                $upload_time = $time_end - $time_start;
                echo $upload_time."\t";
                echo (4/$upload_time)."\n";
        } else {
                echo "Error downloading ($result)\n";
        }
        sleep(60);
}

?>