Error fetching http headers in SoapClient

Question

I\'m trying to invoke a WS over https on a remote host:remote port and I get:

Error fetching http headers

using the PHP5 SoapCli

Answer 1

Another possible cause of this error could be some OpenSSL operations leaving not cleared errors. Put this piece of code before the SOAP request to clear them:

while (openssl_error_string()) {}

Answer 2

Setting 'keep_alive' to false worked for me:

new SoapClient($api_url, array('keep_alive' => false));

Answer 3

The configuration that has worked for me was defining at my php script the following parameters:

ini_set('default_socket_timeout', 5000);
$client = new \SoapClient($url,array(
    'trace' =>true,
    'connection_timeout' => 5000,
    'cache_wsdl' => WSDL_CACHE_NONE,
    'keep_alive' => false,
));

Please, comment.

The most important parameter definition, as per my experience with this issue was

ini_set('default_socket_timeout', 5000);

During my tests I have defined the default_socket_timeout to 5 seconds and the error 'Error Fetching http headers' was raised instantaneously.

I hope it helps you!