Description:
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When connecting to a SoapServer that also includes PDO to create a database connection, the SoapServer stops sending SOAP-ENV resulting in a "Fatal error: Uncaught SoapFault exception: [Client] looks like we got no XML document in..."

Using mysqli to connect to a database within the SoapServer (you actually call PDO/mysqli from within the class that the SoapServer uses)  works fine and directly calling the class itself also causes no problems.

PHP doesn't crash, but sometimes Apache (2.0.55) does.

Reproduce code:
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http://www.mindstix.com/persistenceTestServer.zip

Expected result:
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Count: 1
Count: 2
Count: 3

Actual result:
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Fatal error: Uncaught SoapFault exception: [Client] looks like we got no XML document in C:\test\webservices\persistenceTestClient.php:6 Stack trace: #0 [internal function]: SoapClient->__call('count', Array) #1 C:\test\webservices\persistenceTestClient.php(6): SoapClient->count() #2 {main} thrown in C:\test\webservices\persistenceTestClient.php on line 6