<?php
print_r(get_headers('http://www.google.com',true));
?>

Array
(
    [0] => HTTP/1.1 302 Found
    [Date] => Array
        (
            [0] => Mon, 01 Oct 2018 04:23:17 GMT
            [1] => Mon, 01 Oct 2018 04:23:18 GMT
        )


    [Server] => Array
        (
            [0] => Apache
            [1] => nginx
        )


    [Location] => http://ygoogle.com
    [Content-Length] => 0
    [Connection] => Array
        (
            [0] => close
            [1] => close
        )


    [Content-Type] => Array
        (
            [0] => text/html; charset=UTF-8
            [1] => text/html; charset=UTF-8
        )


    [1] => HTTP/1.1 200 OK
    [X-Adblock-Key] => MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBANDrp2lz7AOmADaN8tA50LsWcjLFyQFcb/P2Txc58oYOeILb3vBw7J6f4pamkAQVSQuqYsKx3YzdUHCvbVZvFUsCAwEAAQ==_Z/NdxHRcnr9u5TCVIKZS3JB/bFN17Fxlj8l7iGGKdj8r8SneCzubNylCr+OulWUOwe9PKabMF9Lgb5Ktk3LE5g==
)