[OCI8] Patch for bug #29779

I created a patch for http://bugs.php.net/bug.php?id=29779 (which can be considered as a feature request more than a bug).

Rather than pinging existing connection each time, which would slow down things too much for high traffic sites, the patch pings connections only every x seconds. Considering this problem occurs when a firewall drops idle connections after let's say one hour of inactivity, I think this is a fine solution.

I added a php.ini variable : oci8.ping_freq (if not set, oci8 works like before). The code adds a last_ping timestamp to the server struct, and pings when ping_freq > 0 && (time(NULL) - last_ping) > ping_freq. It otherwise uses the commented oci_ping call.

The patch (against CVS/5.0 branch) can be found at :
http://www.jeuxdecartes.net/static/oci8.ping_freq.patch

Hope you'll find this patch ok, and will include it in future releases of 5.0.

Jean-François Bustarret
eTF1 - http://www.tf1.fr

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