Произошла ошибка в whois-сервере при вызове whois-клиента

Это мой код сервера whois. Когда я извиняюсь (whois domain1.lk) на сервере, ему ответили 2 или 3 минуты и выдает предупреждение
Предупреждение PHP: socket_read (): невозможно прочитать из сокета [104]: сброс соединения по одноранговому узлу в /home/user1/whoisserver/socket.php в строке 97
Предупреждение PHP: socket_write (): невозможно записать в сокет [32]: сломанный канал в /home/chamara/whoisserver/socket.php в строке 117
Не удалось записать вывод

<?php

// Creating the DB Connection-------------------------------------------------------------------------------

$mysqli = new mysqli("localhost", "root", "", "db1");
if ($mysqli->connect_errno) {
printf("Connect failed: %s\n", $mysqli->connect_error);
exit();
}
// Creating the Socket Connection---------------------------------------------------------------------------

$address = "localhost";
$port = 43;
set_time_limit(0);
if (false == ($socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP))) {
echo "could not create socket";
}

socket_bind($socket, $address, $port) or die("could not bind socket");
socket_listen($socket);

$clients = array($socket);

while (true) {

$read = array();
$read[] = $socket;
$read1 = array_merge($read, $clients);

if (
socket_select($read1, $write = NULL, $except = NULL, 0) < 1) {
continue;
}

if (in_array($socket, $read1)) {
if (( $client = socket_accept($socket)) === false) {
socket_strerror(socket_last_error($socket));
break;
}
$clients[] = $client;
$key = array_keys($clients, $client);
}
foreach ($clients as $key => $client1) {

if (in_array($client1, $read1)) {

// Getting user input------------------------------------------------------------------------------------------------

$string = 'Enter a number' . "\r\n" . "\r\n";
socket_write($client, $string, strlen($string)) or die("Could not write output\n");

$str = '';
while ($input = socket_read($client, 1024)) {
$str .= $input;
if (strpos($str, "\n") !== false) {
break 1;
}
}

// Check whether a valied domain name or not------------------------------------------------------------------------------------

if (!preg_match('/[\'^£$%&*()}{@#~?><>,|=_+¬-]/', $str)) {

// Split input into two parts------------------------------------------------------------------------------------

$part = explode(".", $str);

$last_part1 = $part[count($part) - 1];
$last_part = trim($last_part1);

if ($last_part != 'lk') {

socket_write($client, "\r\n" . 'This is not a Registered Domain under  Registry' . "\n") or die("Could not write output\n");
socket_write($client, "\r\n" . '-------------------------------END------------------------------' . "\n") or die("Could not write output\n");
} else {

$lastBeforePart = $part[count($part) - 2];

if (($lastBeforePart == 'com') || ($lastBeforePart == 'hotel') || ($lastBeforePart == 'edu') || ($lastBeforePart == 'org') || ($lastBeforePart == 'web')) {

$part1 = $part[count($part) - 3];
$part2 = $lastBeforePart . "." . $last_part;
} else {
$part1 = $lastBeforePart;
$part2 = $last_part;
}

socket_write($client, "\r\n" . 'This Service is Provided by the  Registry. ') or die("Could not write output\n");
socket_write($client, "\r\n" . 'Visit  Domain at www.test.lk') or die("Could not write output\n");
socket_write($client, "\r\n" . 'Contact Us at 123456 ' . "\n") or die("Could not write output\n");

//DB query----------------------------------------------------------------------------------------------------------

$sql = "SELECT DomainCategory.Name ". "FROM DomainName_Client, DomainNameType, DomainCategory, OrderDomain_Client ". "WHERE DomainName_Client.Name='$part1' ". "AND DomainNameType.Name='$part2' ". "AND DomainName_Client.TypeID=DomainNameType.ID ". "AND DomainCategory.ID=DomainName_Client.DomainCategoryID ". "AND OrderDomain_Client.DomainNameID=DomainName_Client.ID";

$sql1 = "SELECT OrderItem_Client.Created,OrderItem_Client.ExpirationDate ". "FROM DomainName_Client, DomainNameType, OrderDomain_Client, OrderItem_Client ". "WHERE DomainName_Client.Name='$part1' ". "AND DomainNameType.Name='$part2'". "AND DomainName_Client.TypeID=DomainNameType.ID ". "AND OrderDomain_Client.DomainNameID=DomainName_Client.ID  ". "AND OrderDomain_Client.OrderItemID = OrderItem_Client.ID ";

$sql2 = "SELECT Customer_Client.FirstName ". "FROM DomainName_Client, DomainNameType, OrderDomain_Client, OrderItem_Client, Order_Client,Customer_Client ". "WHERE DomainName_Client.Name='$part1' ". "AND DomainNameType.Name='$part2' ". "AND DomainName_Client.TypeID=DomainNameType.ID ". "AND OrderDomain_Client.DomainNameID=DomainName_Client.ID ". "AND OrderDomain_Client.OrderItemID=OrderItem_Client.ID ". "AND Order_Client.ID= OrderItem_Client.OrderID ". "AND Customer_Client.ID= Order_Client.RegistrantID";

$sql3 = "SELECT Organization_Client.Name ". "FROM DomainName_Client, DomainNameType, OrderDomain_Client,  OrderItem_Client, Order_Client,Organization_Client ". "WHERE DomainName_Client.Name='$part1' ". "AND DomainNameType.Name='$part2' ". "AND DomainName_Client.TypeID=DomainNameType.ID ". "AND OrderDomain_Client.DomainNameID=DomainName_Client.ID ". "AND OrderDomain_Client.OrderItemID = OrderItem_Client.ID ". "AND OrderItem_Client.OrderID= Order_Client.ID ". "AND Organization_Client.ID= Order_Client.OrganizationID";

$sql4 = "SELECT ResourceRecord_Client.Type, ResourceRecord_Client.Parameter, ResourceRecord_Client.Value ". "FROM DomainName_Client, DomainNameType, OrderDomain_Client, ResourceRecord_Client ". "WHERE DomainName_Client.Name='$part1' ". "AND DomainNameType.Name='$part2' ". "AND DomainName_Client.TypeID=DomainNameType.ID ". "AND OrderDomain_Client.DomainNameID=DomainName_Client.ID ". "AND ResourceRecord_Client.OrderDomainID=OrderDomain_Client.ID ";

$sql5 = "SELECT NameServerRecord_Client.NameServer, NameServerRecord_Client.IPAddress, NameServerRecord_Client.TTL ". "FROM DomainName_Client, DomainNameType, OrderDomain_Client, NameServerRecord_Client ". "WHERE DomainName_Client.Name='$part1'". "AND DomainNameType.Name='$part2' ". "AND DomainName_Client.TypeID=DomainNameType.ID " . "AND OrderDomain_Client.DomainNameID=DomainName_Client.ID ". "AND NameServerRecord_Client.OrderDomainID=OrderDomain_Client.ID";

$sqlNew = "SELECT Name " . "FROM DomainName_Client ". "WHERE Name='$part1'";

$resultNew = $mysqli->query($sqlNew);
$rowNew = $resultNew->num_rows;
// var_dump($rowNew);

if ($rowNew > 0) {// Category name-----------------------------------------------------------------------------------------------

$result = $mysqli->query($sql);
$row0 = $result->num_rows;

if ($row0 > 0) {

$row = $result->fetch_array(MYSQLI_ASSOC);
$category = $row['Name'];

socket_write($client, "\r\n" . 'Category     :   ' . $category . "\n") or die("Could not write output\n");
} else {
socket_write($client, "\r\n" . 'Category     :   No any Category' . "\n") or die("Could not write output\n");
}

// Date details-----------------------------------------------------------------------------------------------

$result1 = $mysqli->query($sql1);
$row1 = $result1->num_rows;

if ($row1 > 0) {

$row = $result1->fetch_array(MYSQLI_ASSOC);
$created_date = $row['Created'];
$edited_date = $row ['ExpirationDate'];

if ($created_date == '') {

$created_date = 'There is no any created date';
} else {
$created_date = $row['Created'];
}
if ($edited_date == '') {

$edited_date = 'There is no expiration date';
} else {
$edited_date = $row['ExpirationDate'];
}

socket_write($client, "\r\n" . 'Created on   :  ' . $created_date) or die("Could not write output\n");
socket_write($client, "\r\n" . 'Expires on   :  ' . $edited_date . "\n") or die("Could not write output\n");
} else {
$created_date = 'There is no any created date';
$edited_date = 'There is no expiration date';

socket_write($client, "\r\n" . 'Created on   :  ' . $created_date) or die("Could not write output\n");
socket_write($client, "\r\n" . 'Expires on   :  ' . $edited_date . "\n") or die("Could not write output\n");
}

// company details-----------------------------------------------------------------------------------------------

$result3 = $mysqli->query($sql3);
$row3 = $result3->num_rows;

if ($row3 > 0) {

$row = $result3->fetch_array(MYSQLI_ASSOC);
$company = $row['Name'];

socket_write($client, "\r\n" . 'Company Name        :   ' . $company) or die("Could not write output\n");
} else {
socket_write($client, "\r\n" . 'Company Name        :   No any Company Name') or die("Could not write output\n");
}

// User contact details-----------------------------------------------------------------------------------------------

$result2 = $mysqli->query($sql2);
$row4 = $result2->num_rows;

if ($row4 > 0) {

$row = $result2->fetch_array(MYSQLI_ASSOC);
$FirstName = $row['FirstName'];

socket_write($client, "\r\n" . 'Registrant Contact  :  ' . $FirstName . "\n") or die("Could not write output\n");
} else {
socket_write($client, "\r\n" . 'Registrant Contact  :  No any Registrant Contact ' . "\n") or die("Could not write output\n");
}

// Resource records-----------------------------------------------------------------------------------------------

$result4 = $mysqli->query($sql4);
$row5 = $result4->num_rows;

if ($row5 > 0) {
socket_write($client, "\r\n" . 'Resource Record Information' . "\n") or die("Could not write output\n");

while ($row = $result4->fetch_assoc()) {

$Type = $row['Type'];
$value = $row['Value'];
$parameter = $row['Parameter'];
if ($Type == '') {
socket_write($client, "\r\n" . 'Type        :   No any type') or die("Could not write output\n");
} else {
socket_write($client, "\r\n" . 'Type        :   ' . $Type) or die("Could not write output\n");
}

if ($value == '') {
socket_write($client, "\r\n" . 'Value        :   No any value') or die("Could not write output\n");
} else {
socket_write($client, "\r\n" . 'Value       :   ' . $value) or die("Could not write output\n");
}
if ($parameter == '') {
socket_write($client, "\r\n" . 'Parameter   :   No any Parameter') or die("Could not write output\n");
} else {
socket_write($client, "\r\n" . 'Parameter   :   ' . $parameter . "\n") or die("Could not write output\n");
}
}
}
// Name server records-----------------------------------------------------------------------------------------------

$result5 = $mysqli->query($sql5);
$row6 = $result5->num_rows;

if ($row6 > 0) {
socket_write($client, "\r\n" . 'NameServer Record Information' . "\n") or die("Could not write output\n");

while ($row = $result5->fetch_assoc()) {

$ip = $row['IPAddress'];
$ttl = $row ['TTL'];
$nameserver = $row['NameServer'];
if ($nameserver == '') {
socket_write($client, "\r\n" . 'NameServer  :   No any Name Server') or die("Could not write output\n");
} else {
socket_write($client, "\r\n" . 'NameServer  :   ' . $nameserver) or die("Could not write output\n");
}
if ($ip == '') {
socket_write($client, "\r\n" . 'IP Address  :   No any IP Address') or die("Could not write output\n");
} else {
socket_write($client, "\r\n" . 'IP Address  :   ' . $ip) or die("Could not write output\n");
}
if ($ttl == '') {
socket_write($client, "\r\n" . 'TTL     :   No any TTL') or die("Could not write output\n");
} else {
socket_write($client, "\r\n" . 'TTL         :   ' . $ttl . "\n") or die("Could not write output\n");
}
}
}
socket_write($client, "\r\n" . '-------------------------------END------------------------------' . "\n") or die("Could not write output\n");
} else {
socket_write($client, "\r\n" . 'This is not a Registered Domain under  Registry' . "\n") or die("Could not write output\n");
socket_write($client, "\r\n" . '-------------------------------END------------------------------' . "\n") or die("Could not write output\n");
}
}
} else {
socket_write($client, "\r\n" . 'This is not a Registered Domain under Registry' . "\n") or die("Could not write output\n");
socket_write($client, "\r\n" . '-------------------------------END------------------------------' . "\n") or die("Could not write output\n");
}
socket_close($socket);
}
}
}