Read DNS entries

[lifutushi]

i need to build a script that will let the website i'm currently building to read entries from DNS servers and ping the entries to see if they're alive. the problem is i have no idea how to 'read the DNS entries'. can someone help me with this, please?

thank you

[etully]

In general, you will need to use one of the various ways to pass a command to an external application (probably the dig, host, or nslookup command). In PHP, you can use [MAN]exec[/MAN], [MAN]passthru[/MAN], [MAN]popen[/MAN], or the backtick operator to pass a command to whatever command you want to read the DNS entries.

But to decide which DNS tool is most appropriate, I'll need to know a little more about what you're trying to accomplish.

[dagon]

there's checkdnsrr() and the other network functions to

[lifutushi]

i've tried checkdnsrr() but it doesn't seem to work well with freeBSD...

i've tried nslookup and dig using exec() and system() but i don't know how to pass the output to a string instead. i don't want the result to be displayed in the page rightaway, but i want to filter out unneccesary things first so that only AAAA addresses are displayed and pinged.

the concept of the online tools i'm building is simple:

1) read the entries of tier-1 DNS to look for tier-2 IPv6 nameservers(NS).
2) read the entries of these IPv6 nameservers to look for
a) IPv6/AAAA website
ping these websites to see if they're alive
b) tier- 3 IPv6 NS
repeat step 2 (recursive)
3) The list and link of active IPv6 website in the my country will be displayed (and nothing else).