<?php

if (isset($_POST["isim"]) && isset($_POST["soyisim"]) && isset($_POST["dgy"]) && isset($_POST["tc"])) {
    $isim    = $_POST["isim"];
    $soyisim = $_POST["soyisim"];
    $dgy     = $_POST["dgy"];
    $tc      = $_POST["tc"];
} else {
    $myObj          = new stdClass();
    $myObj->status  = "false";
    $myObj->message = "WRONG";
    $myJSON         = json_encode($myObj);
    echo $myJSON;
    die;
}

function tcno_dogrula($bilgiler)
{
    $gonder = '<?xml version="1.0" encoding="utf-8"?>
        <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
        <soap:Body>
        <TCKimlikNoDogrula xmlns="http://tckimlik.nvi.gov.tr/WS">
        <TCKimlikNo>' . $bilgiler["tcno"] . '</TCKimlikNo>
        <Ad>' . $bilgiler["isim"] . '</Ad>
        <Soyad>' . $bilgiler["soyisim"] . '</Soyad>
        <DogumYili>' . $bilgiler["dogumyili"] . '</DogumYili>
        </TCKimlikNoDogrula>
        </soap:Body>
        </soap:Envelope>';
    
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, "https://tckimlik.nvi.gov.tr/Service/KPSPublic.asmx");
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_HEADER, FALSE);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $gonder);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
        'POST /Service/KPSPublic.asmx HTTP/1.1',
        'Host: tckimlik.nvi.gov.tr',
        'Content-Type: text/xml; charset=utf-8',
        'SOAPAction: "http://tckimlik.nvi.gov.tr/WS/TCKimlikNoDogrula"',
        'Content-Length: ' . strlen($gonder)
    ));
    $gelen = curl_exec($ch);
    curl_close($ch);
    
    return strip_tags($gelen);
}

// İşlemi gönder ve sonuç

$bilgiler = array(
    "isim" => strip_tags($isim),
    "soyisim" => strip_tags($soyisim),
    "dogumyili" => strip_tags($dgy),
    "tcno" => strip_tags($tc)
);

// Sonucu göster
$sonuc = tcno_dogrula($bilgiler);

$myObj = new stdClass();
if ($sonuc == "true") {
    $myObj->status  = "true";
    $myObj->message = "SUCCESS";
    $myJSON         = json_encode($myObj);
    echo $myJSON;
} else {
    $myObj->status  = "false";
    $myObj->message = "WRONG";
    $myJSON         = json_encode($myObj);
    echo $myJSON;
}

<form action="" method="POST">
    <label>Ad:</label><br>
    <input type="text" name="isim"><br>
    <label>Soyad:</label><br>
    <input type="text" name="soyisim"><br>
    <label>Doğum Yılı:</label><br>
    <input type="text" name="dgy"><br>
    <label>TC NO:</label><br>
    <input type="password" name="tc"><br>
    <input type="submit" name="submit" value="Kontrol Et" />
</form>

<?php
if(isset($_POST['submit'])) {
    $data = [
        'isim' => $_POST['isim'],
        'soyisim' => $_POST['soyisim'],
        'dgy' => $_POST['dgy'],
        'tc' => $_POST['tc']
    ];
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, 'http://localhost/tckn.php');
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
    $response = curl_exec($ch);
    curl_close($ch);
    $result = json_decode($response, true);
    print $result['message'];
}
?>