title: PHP SOAP WSDL cache not working
body: <p>i'm troubled with soap wdl cache directory where i set to save my soap object. I've set the <code>soap.wsdl_cache_dir="/tmp"</code> in php.ini. I don't know how it's not saving any files in /tmp folder after i create the object, it's just stay empty in there.
  i have set <code>soap.wsdl_cache_enabled=3</code> and restart the apache service too.</p>