PHP Socket (TCP, TLS, UDP, SSL) Server/Client Library

• PHP 7.4 or higher
• PHP Sockets Extension

composer require initphp/socket

Supported Types :

• TCP
• UDP
• TLS
• SSL

\InitPHP\Socket\Socket::class It allows you to easily create socket server or client.

public static function server(int $handler = Socket::TCP, string $host = '', int $port = 0, null|string|float $argument = null): \InitPHP\Socket\Interfaces\SocketServerInterface

• $handler : Socket::SSL, Socket::TCP, Socket::TLS or Socket::UDP
• $host : Identifies the socket host. If not defined or left blank, it will throw an error.
• $port : Identifies the socket port. If not defined or left blank, it will throw an error.
• $argument : This value is the value that will be sent as 3 parameters to the constructor method of the handler.
  • SSL or TLS = (float) Defines the timeout period.
  • UDP or TCP = (string) Defines the protocol family to be used by the socket. "v4", "v6" or "unix"

public static function client(int $handler = self::TCP, string $host = '', int $port = 0, null|string|float $argument = null): \InitPHP\Socket\Interfaces\SocketClientInterface

• $handler : Socket::SSL, Socket::TCP, Socket::TLS or Socket::UDP
• $host : Identifies the socket host. If not defined or left blank, it will throw an error.
• $port : Identifies the socket port. If not defined or left blank, it will throw an error.
• $argument : This value is the value that will be sent as 3 parameters to the constructor method of the handler.
  • SSL or TLS = (float) Defines the timeout period.
  • UDP or TCP = (string) Defines the protocol family to be used by the socket. "v4", "v6" or "unix"

connection() : Initiates the socket connection.

public function connection(): self;

disconnect() : Terminates the connection.

public function disconnect(): bool;

read() : Reads data from socket.

public function read(int $length = 1024): ?string;

write() : Writes data to the socket

public function write(string $string): ?int;

live() :

public function live(callable $callback): void;

wait() :

public function wait(int $second): void;

TLS and SSL work similarly.

There are some additional methods you can use from TLS and SSL sockets.

timeout() : Defines the timeout period of the current.

public function timeout(int $second): self;

blocking() : Sets the blocking mode of the current.

public function blocking(bool $mode = true): self;

crypto() : Turns encryption on or off on a connected socket.

public function crypto(?string $method = null): self;

Possible values for $method are;

• "sslv2"
• "sslv3"
• "sslv23"
• "any"
• "tls"
• "tlsv1.0"
• "tlsv1.1"
• "tlsv1.2"
• NULL

option() : Defines connection options for SSL and TLS. see; https://www.php.net/manual/en/context.ssl.php

public function option(string $key, mixed $value): self;

Example :

require_once "../vendor/autoload.php";
use \InitPHP\Socket\Socket;
use \InitPHP\Socket\Interfaces\SocketServerInterface;

$server = Socket::server(Socket::TLS, '127.0.0.1', 8080);
$server->connection();

$server->live(function (SocketServerInterface $socket) {
    switch ($socket->read()) {
        case 'exit' : 
            $socket->write('Goodbye!');
            return;
        case 'write' :
            $socket->write('Run write command.');
        break;
        case 'read' :
            $socket->write('Run read command.');
        break;
        default: return;
    }
});

Example :

require_once "../vendor/autoload.php";
use \InitPHP\Socket\Socket;

$client = Socket::client(Socket::SSL, 'smtp.gmail.com', 465);

$client->option('verify_peer', false)
    ->option('verify_peer_name', false);

$client->connection();

$client->write('EHLO [127.0.0.1]');

echo $client->read();

In the above example, a simple smtp connection to gmail is made.

• Muhammet ŞAFAK <[email protected]>

Copyright © 2022 MIT License