有没有可能在不安装sqlsrv驱动程序的情况下在PHP中使用MsSQL？

<?php
$server = 'server_name';
$user = 'username';
$password = 'password';
$database = 'database_name';

$conn = mssql_connect($server, $user, $password);
mssql_select_db($database, $conn);

$query = "SELECT * FROM table_name";
$result = mssql_query($query);

while ($row = mssql_fetch_array($result)) {
    // 处理查询结果
}

mssql_close($conn);
?>

<?php
$server = 'server_name';
$user = 'username';
$password = 'password';
$database = 'database_name';

$dsn = "sqlsrv:Server=$server;Database=$database";
$conn = new PDO($dsn, $user, $password);

$query = "SELECT * FROM table_name";
$result = $conn->query($query);

while ($row = $result->fetch(PDO::FETCH_ASSOC)) {
    // 处理查询结果
}

$conn = null;
?>