Sql server refused to connect using laravel 7

Error message:

SQLSTATE[08001]: [Microsoft][ODBC Driver 11 for SQL Server]TCP Provider: No connection could be made because the target machine actively refused it.
 (SQL: select * from [TblEmployee])

when i try to connect to sql server using laravel i got above error, but i successfully connect using core php

<?php
$servername = "localhost";
$username = "username";
$password = "password";

try {
    $conn = new PDO("sqlsrv:Server=$servername;Database=bcsdb_Staff", $username, $password);
    // set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "<code>";
    echo "Connected successfully<br>";

    //  fetch query
    $sql = "SELECT * FROM TblEmployee";

    //  get result
    $result = $conn->query($sql);

    while ($row = $result->fetchObject()) {
        echo "{$row->EMPNAME}";
    }


    $conn = null;

    echo "</code>";
} catch (PDOException $e) {
    echo "Connection failed: " . $e->getMessage();
}

my .env config

DB_CONNECTION=sqlsrv
DB_HOST=localhost
DB_PORT=1433
DB_DATABASE=bcsdb_Staff
DB_USERNAME=username
DB_PASSWORD=password