Description:
------------
Many "open source" softwares like phpadsnew, and squiremail ( i've got problems on theses ), hangs.
after looking into their code, i've found that all fuctions reset(), next(), prev() hangs when passed value is'nt an array.



Reproduce code:
---------------
code sample (all latest versions) :
// phpAdsNew

if (phpAds_isUser(phpAds_Admin))
   $pages[]        = $phpAds_nav['admin'];
elseif (phpAds_isUser(phpAds_Client))
   $pages[]  = $phpAds_nav['client'];
elseif (phpAds_isUser(phpAds_Affiliate))
   $pages[]  = $phpAds_nav['affiliate'];
else
   $pages  = array();
                
                
                
for (reset($pages);$key=key($pages);next($pages))
{
   //// .... ////
}

// squireMail 

if (is_array($msort)) { 
 for (reset($msort); ($key = key($msort)), (isset($key)); next($msort)) {
  //// ... ////
}


Actual result:
--------------
added $pages = array() for phpadsnew ( bug fixed )

but, put code into comments onto squiremail ( don't have any time...)