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Date: Thu, 26 Jun 2008 20:37:39 +0200
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Subject: Re: [PHP-DEV] Using Network functions.
From: chris_se@gmx.net (Christian Seiler)

Hi!

> 2. What does streams has to do with this networking? Can it be done using
> streams?

Yes, it can. Take the following simple, incomplete example without much
error handling as a starting point:

// in the header
#include "php_streams.h"

// PHP function:
PHP_FUNCTION(simplehttp_fetch)
{
   php_stream *stream;
   struct timeval tv;
   int err;
   char *errstr;
   char buf[8192];

   tv.tv_sec = 30;
   tv.tv_usec = 0;
   stream = php_stream_xport_create("tcp://www.google.com:80",
               sizeof("tcp://www.google.com:80")-1,
                ENFORCE_SAFE_MODE | REPORT_ERRORS,
                TREAM_XPORT_CLIENT | STREAM_XPORT_CONNECT,
                NULL, &tv, NULL, &errstr, &err);

   if (stream == NULL) {
     php_error(E_WARNING TSRMLS_CC,
       "unable to connect to tcp://www.google.com:80: %s",
       errstr == NULL ? "unknown error" : errstr);
     RETURN_NULL();
   }

   php_stream_write(stream,
      "GET / HTTP/1.0\r\nHost: www.google.com\r\n\r\n",
      sizeof("GET / HTTP/1.0\r\nHost: www.google.com\r\n\r\n")-1);
   memset(buf, 0, 8192);
   php_stream_read(stream, buf, 8191);

   php_stream_close(stream);

   RETURN_STRING(buf, 1);
}

Basically, you want to look at main/php_streams.h and
main/streams/php_stream_transport.h in the PHP source code. Userland
fsockopen() essentially maps to php_stream_xport_create() and userland
fread, fwrite, close, etc. essentially map to php_stream_read(),
php_stream_write, php_stream_close, etc.

Regards,
Christian