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4.x is outdated, please check the latest version 22.x
Latest version:
pecl install openswoole-22.1.2
<?php Swoole\Coroutine\Client->send(string $data): int|bool
The data to send to the connected remote server. Must be a string type and support binary data.
A successful send will return the number of bytes that were sent. A failed send will return false, you should then use $client->errCode to find out why.
Send a TCP/UDP package to the connected remote server. Data can be either string or binary.
When a successful send starts to happen, sometimes the $data may be differing lengths upon the return compared to the actual full $data length, this is because the socket failed during the data transfer and the socket has been closed resulting in a send which returns how many bytes were managed to be sent, you should then check the error code using $client->errCode.
<?php
use Swoole\Coroutine\Client;
Co\run(function()
{
$client = new Client(SWOOLE_SOCK_TCP);
if(!$client->connect('127.0.0.1', 9501, 0.5))
{
echo "Connection failed with error: {$client->errCode}\n";
}
$data = "Hello World! - from Swoole\n";
$result = $client->send($data);
if($result === false || $result !== strlen($data))
{
echo "Failed to correctly send data, error code: $client->errCode\n";
}
echo $client->recv();
$client->close();
});