Kodu düzenledim eksik olmuş kusura bakma;)


function YahoBacklink($domain) {
$api = "SENİN API KEY";
$url="http://search.yahooapis.com/SiteExplorerService/V1/inlinkData?appid=".$api."&query=".$domain."&entire_site=1&omit_inlinks=domain&results=1&output=php";
$data = file_get_contents($url);
$results=unserialize($data);
return $results['ResultSet']['totalResultsAvailable'];
}

echo YahoBacklink("wmaraci.com");