(PECL geoip >= 1.1.0)
geoip_asnum_by_name — Get the Autonomous System Numbers (ASN)
$hostname
)The geoip_asnum_by_name() function will return the Autonomous System Numbers (ASN) associated with an IP address.
hostnameThe hostname or IP address.
Returns the ASN on success, or FALSE if the address
cannot be found in the database.
Example #1 A geoip_asnum_by_name() example
This will output the ASN of the host www.example.com.
<?php
$asn = geoip_asnum_by_name('www.example.com');
if ($asn) {
echo 'The ASN is: ' $asn;
}
?>
以上例程会输出：
The ASN is: AS15133 EdgeCast Networks, Inc