Network Function dns_get_record() in PHP

I was not able to use this function in our php4 version.

I came to learn that this is supported in latest php4 versions and PHP5 version.
As a work around I tried using a backport extension written bye a user. I too dint go well.

At last very simple function exec() helped over it.
It is used to execute a command. It was used to execute the nslookup command.