(PECL getdns >= 0.10.0)
php_getdns_get_version_number — Get the getdns runtime library version information in number format.
This function returns the runtime getdns library version information in number format. Note that this will give you the version of the library that you're currently linked against, not the version of the headers used to compile the library. Compile-time information can be found using the phpinfo() function once the getdns extension has been loaded by PHP. The version information should be consistent for reliable operation.
This function has no parameters.
This function returns a 32-bit integer representation of the runtime getdns library version information. The format uses the three high-order bytes to represent the major, minor, and patch level parts of the runtime version number. The low-order byte is unused. For example, version "0.3.0" has a numeric representation of 0x00030000.