• WordPress behind nginx

    if ( ! empty( $_SERVER['HTTP_X_FORWARDED_FOR'] )
    && preg_match( '/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/',
    $_SERVER['HTTP_X_FORWARDED_FOR'] ) )
    $_SERVER['REMOTE_ADDR'] = $_SERVER['HTTP_X_FORWARDED_FOR'];


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