Php implements the checkdnsrr function of the window Platform

Php implements the checkdnsrr function of the window Platform

This article mainly introduces how php implements the checkdnsrr function of the window platform. The built-in checkdnsrr function of PHP is only valid on the linux platform. This article simulates the checkdnsrr function that can be used in a window, for more information, see

PHP's built-in checkdnsrr function is only valid on the linux platform. It makes compatibility troublesome if it is not used on the window platform.

Therefore, a checkdnsrr simulation function is written for use in the Windows platform environment.

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If (! Function_exists ('checkdnsrr ')){ Function checkdnsrr ($ host, $ type ){ If (! Empty ($ host )&&! Empty ($ type )){ @ Exec ('nslookup-type = '. escapeshellarg ($ type).'. escapeshellarg ($ host), $ output ); Foreach ($ output as $ k => $ line ){ If (eregi ('^'. $ host, $ line )){ Return true; } } } Return false; } }