Description:
------------
---
From manual page: http://www.php.net/function.curl-multi-exec#refsect1-function.curl-multi-exec-examples
---
In: Example #1 curl_multi_exec() , executing curl_multi_exec and processing url channels handles based on CURLM_CALL_MULTI_PERFORM defined constant will no be valid. This is due the development in libCurl that is decided by its team. this is issue is found in LibCurl version 7.20.0 and above, where "CURLM_CALL_MULTI_PERFORM is deprecated and will never be returned,as documented" (1)

The PHP 5.4.12 extension of curl is based on  LibCurl 7.27.0. 

Therefore, the example runs until timeout.with out a valid result. 

Reference :
(1) http://comments.gmane.org/gmane.comp.web.curl.library/36537


Test script:
---------------
//execute the handles (scrap from Example #1 curl_multi_exec ) where the problem.

do {
    $mrc = curl_multi_exec($mh, $active);
} while ($mrc == CURLM_CALL_MULTI_PERFORM);

while ($active && $mrc == CURLM_OK) {
    if (curl_multi_select($mh) != -1) {
        do {
            $mrc = curl_multi_exec($mh, $active);
        } while ($mrc == CURLM_CALL_MULTI_PERFORM);
    }
}
//--------------------------------------
/*  The old code example work like charm , as in these cases
do {    curl_multi_exec($mh,$active);  }  while ($active > 0);
*/

Expected result:
----------------
- output of urls resource contents.
- $mrc variable should rotate values of active running handle count.
- CURLM_CALL_MULTI_PERFORM should count of actual handles in the stack,if it is valid.

Actual result:
--------------
timeout... :(