Allow IP

<?php
echo " Seu Ip Atual : ";
echo ($_SERVER['REMOTE_ADDR']);
if( !empty($_GET["newip"]) ){

        $ip = trim($_GET["newip"]);
        if( filter_var($ip, FILTER_VALIDATE_IP) ){

                //RewriteCond %{REMOTE_ADDR} !^179\.108\.123\.250$
                $AddIp = "RewriteCond %{REMOTE_ADDR} !^".str_replace(".","\.",$ip)."$";
                $contentHtaccess = explode("\n", file_get_contents('../.htaccess'));
                $newContentHtaccess = [];
                foreach( $contentHtaccess as $indexFile => $valueFile){

                        if( strpos($valueFile, "#fim_listA_HGBLOCK") !== false ){

                                $newContentHtaccess[] = $AddIp;
                                $newContentHtaccess[] = $valueFile;

                        }else{

                                $newContentHtaccess[] = $valueFile;

                        }

                }

                rename("../.htaccess", "../.htaccess".date("dmYhis"));
                $fileNewHtaccess = fopen('../.htaccess', 'w');

                foreach( $newContentHtaccess as $indexNFile => $valueNF ){

                        fwrite($fileNewHtaccess, $valueNF.PHP_EOL );

                }



                fclose($fileNewHtaccess);

        }else{

                $error = "IP inválido";

        }

}else{

        $error = "Informar um IP Valido por favor";
}
?>
<form action="#" method="GET">
<label>Liberar IP :  </label><input type="text" name="newip" id="newip" value="" placeholder="1.1.1.1"> <input type="submit" name="chargeform" id="chargeform" value="Liberar IP">
</form>