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<?php $url = "http://myvcilocal.com"; $subdomain="test"; if(trim($subdomain) == '') { return $url; } $new = preg_replace_callback("~^(http://)?(([^.]+)\.)?([^.]+)\.([a-zA-Z0-9]+)(?=/|$)~",function($matches) use ($subdomain) { return $matches[3] = $subdomain; },$url); echo $new."\n".$url;
Output for git.master, git.master_jit, rfc.property-hooks
test http://myvcilocal.com

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