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4.x is outdated, please check the latest version 22.x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\PostgreSQL->connect(string $connectionString): bool
Pass in the Postgres connection string used to connect to the server and database.
Returns true if there were no connection errors and false when there was a problem. Check the error message.
Establish a postgresql non-blocking connection within a coroutine context.
The example shows you how to deal with connection errors.
<?php
use Swoole\Coroutine\PostgreSQL;
Co\run(function()
{
$pg = new PostgreSQL();
$conn = $pg->connect("host=127.0.0.1;port=5432;dbname=test;user=postgres;password=***");
var_dump($pg->error, $conn);
});