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pecl install openswoole-22.1.2 | composer require openswoole/core:22.1.5
<?php OpenSwoole\Coroutine\System::gethostbyname(string $domain, int $family = AF_INET, float $timeout = -1): string|false
Hostname to lookup and resolve to an IP. For example: OpenSwoole.co.uk
The domain family to use, AF_INET represents IPv4 addresses and AF_INET6 represents IPv6 addresses.
A float in seconds for how long before timing out the lookup. Because a float is used, 1.5 means 1.5 seconds. By default -1 means don't time out. The lowest possible value is 0.001.
If successful it returns the IP address of the hostname as a string and false when there was an error. Use OpenSwoole\Util::getLastErrorCode() to see what went wrong.
Get the IP address of a hostname. Resolves the domain name to an IP, this method won't block other processes, must be used within a coroutine.
You can also use OpenSwoole\Coroutine\System::dnsLookup to get IP of a hostname.
<?php
co::set(['dns_server' => '192.0.0.1:53']);
co::run(function()
{
$ip = OpenSwoole\Coroutine\System::gethostbyname('openswoole.com');
var_dump($ip);
});
Output:
<?php
string(14) "172.67.221.150"
If using a timeout and the hostname cannot be resolved within the specified time then, the function will return:
<?php
co::run(function()
{
$ip = OpenSwoole\Coroutine\System::gethostbyname('openswoole.com', AF_INET, 3);
var_dump($ip);
});