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$pool = new AsyncMysqlConnectionPool(darray[]);
$conn = await $pool->connect('server', int_port, 'database', 'user', 'db-password');
$result = await $conn->query('SELECT * FROM table');
$conn->close();
//get the rows
$result2 = $result->mapRows();
// iterate rows
$finalText = "";
foreach ($result2 as $row) {
$finalText .= $row["column"] . '<br/>';
}
//printing
await IO\request_output()->writeAllAsync($finalText);