仅显示某些国家/地区的代码

Question

So I have an affiliate program that's lately been getting a lot of bad leads from countries we don't service, which we tell affiliates will be voided. Anyways, this is going to cause our reversal rate to be through the roof. So I want to do something about it.

So I want to use geoip, which gets me the stuff as a 2 letter country code.

<?php
    $output = shell_exec('geoip-lookup '.$_SERVER['REMOTE_ADDR']);
?>

So how do I put that together?

Would this be correct?

<?php
$output = shell_exec('geoip-lookup '.$_SERVER['REMOTE_ADDR']);
if($_SESSION['check']!=1) && ($output=='US' || $output=='AU' || $output=='GB' || $output=='CA')
{
    $submission = $_POST['submission_id'];
    $_SESSION['check']=1;
    echo 'insert pixel';
}
?>

Answer 1

You'll want to verify $output is what you expect (i.e. a string - var_dump($output)).

However, provided it is, you'll need to quote your country codes to do a string comparison. Also, as noted by heximal, be sure to use == for comparison. Otherwise, it's an assignment.

if ($_SESSION['check'] != 1 && ($output == 'US' || $output == 'AU' ...)) {

Otherwise, the rest of you code appears correct (without knowing your exact logic).