在PHP中将令人困惑的逻辑与两个数组匹配？

I have this array which provides Geo-restriction information from API, this is an array list of countries where content is being BLOCKED :

Array ( [0] => GU [1] => PR [2] => CA [3] => VI [4] => US [5] => UM [6] => AS [7] => MP [8] => DE )

Now, I have another array which stores country-wise proxy information like this :

$proxies['US'] = 'my_us_proxy_url;
$proxies['DE'] = 'my_de_proxy_url;
$proxies['UK'] = 'my_uk_proxy_url;
$proxies['NL'] = 'my_nl_proxy_url;

I want to get value of the proxy which will allow user to bypass the country restriction i.e. a $proxies[KEY] value where KEY does not exist in the first array.

This is one of the snippet I tried but like everything else this is not the logic what is needed.

            $isBlocked = array_values;
            //print_r($isBlocked);
            if (in_array('US',$isBlocked))
            {
                echo 'US Blocked';
                foreach ($isBlocked as $value) {

                    if (!array_key_exists($value,$proxies)){
                        //Find first non blocked proxy and continue
                        echo "<br/>" . $value ;
                    }
                }

            }

Use $key => $value structure in your foreach loop:

foreach ($proxies as $key => $value) {
    if (!in_array($key, $isBlocked)){
        //Find first non blocked proxy and continue
        echo "<br/>" . $value ;
    }
}

Demo!

Get the key from the proxies array via array_keys. Get the difference to the other array via array_diff. With large arrays that might a tad less expensive than foreach-loops.

That will be:

$data = ['GU', 'PR', 'CA', 'VI', 'US', 'UM', 'AS', 'MP', 'DE '];
$proxies['US'] = 'my_us_proxy_url';
$proxies['DE'] = 'my_de_proxy_url';
$proxies['UK'] = 'my_uk_proxy_url';
$proxies['NL'] = 'my_nl_proxy_url';

$result = array_diff_key($proxies, array_flip($data));