PHP 클라이언트 아이피 주소 | PHP Client IP Address

<?php
    $ip = getenv('HTTP_CLIENT_IP')?:
    getenv('HTTP_X_FORWARDED_FOR')?:
    getenv('HTTP_X_FORWARDED')?:
    getenv('HTTP_FORWARDED_FOR')?:
    getenv('HTTP_FORWARDED')?:
    getenv('REMOTE_ADDR');
?>

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• Get the client IP address using PHP - Stack Overflow