SoapClient connection persistence across page requests

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In my application we have a SOAP Server (gSOAP) that is used for all
data access. The same connection appears to be used throughout each
request no matter how many soap calls are made, but it doesn't seem to
persist across page requests. I'm assuming it's possible... am I
incorrect or am I missing something? (I am running on Windows)

Request headers:

Host: xx:xx (scrubbed)

Connection: Keep-Alive

User-Agent: PHP-SOAP/5.2.5

Accept-Encoding: gzip, deflate

Content-Type: text/xml; charset=utf-8

SOAPAction: ""

Content-Length: 747

Response headers:
HTTP/1.0 200 OK

Server: gSOAP/2.2

Content-Type: text/xml; charset=utf-8

Content-Length: 1041

Connection: keep-alive

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