Soap Request Via Php API

We have to send soap xml Request via php curl and have to pick response . Our xml string is <?xml version="1.0" encoding="UTF-8"?> <SOAP-ENV:Envelope xmlns:SOAP-ENV="[login to view URL]" xmlns:ns1="[login to view URL]"> <SOAP-ENV:Body> <ns1:SendBulkSMS> <ns1:Source>?</ns1:Source> <ns1:Destination>?</ns1:Destination> <ns1:Mask>?</ns1:Mask> <ns1:Message>?</ns1:Message> <ns1:UniCode>0</ns1:UniCode> <ns1:Password>?</ns1:Password> </ns1:SendBulkSMS> </SOAP-ENV:Body> </SOAP-ENV:Envelope> Out put is <s:Envelope xmlns:s="[login to view URL]"> <s:Body> <SendBulkSMSResponse xmlns="[login to view URL]"> <SendBulkSMSResult>Invalid Source Number.</SendBulkSMSResult> </SendBulkSMSResponse> </s:Body> </s:Envelope> Documentation is given on [login to view URL] We have to use simple php curl .