MultiThreading with CURL

<?php
function addHandle(&$curlHandle,$url)
{
$cURL = curl_init();
curl_setopt($cURL, CURLOPT_URL, $url);
curl_setopt($cURL, CURLOPT_HEADER, 0);
curl_setopt($cURL, CURLOPT_RETURNTRANSFER, 1);
curl_multi_add_handle($curlHandle,$cURL);
return $cURL;
}
//execute the handle until the flag passed to function is greater then 0
function ExecHandle(&$curlHandle)
{
$flag=null;
do {
    curl_multi_exec($curlHandle,$flag);//fetch pages in parallel
} while ($flag > 0);
}


$list[1] = "http://www.example1.com";
$list[2] = "ftp://example.com";
$list[3] = "http://www.example2.com";
$curlHandle = curl_multi_init();
for ($i = 1;$i <= 3; $i++)
 $curl[$i] = addHandle($curlHandle,$list[$i]);
ExecHandle($curlHandle);
for ($i = 1;$i <= 3; $i++)
{
 $text[$i] =  curl_multi_getcontent ($curl[$i]);
 echo $text[$i];
}
for ($i = 1;$i <= 3; $i++)//remove the handles
  curl_multi_remove_handle($curlHandle,$curl[$i]);
curl_multi_close($curlHandle);

?>