What are the five ways to connect php to sqlserver?

The five methods for PHP to connect to SQL Server are as follows: 1. Use the "mssql_connect()" function; 2. Use the "sqlsrv_connect()" function; 3. Use the PDO class connection; 4. Use "odbc_connect()" Function; 5. Use COM object mode to connect.

Operating system for this tutorial: Windows 10 system, php8.1.3 version, Dell G3 computer.

The five methods for php to connect to sqlserver are:

1. Use the "mssql_connect()" function

$server = 'localhost';
$username = 'sa';
$password = '';
$database = 'example_db';
$conn = mssql_connect($server, $username, $password);
mssql_select_db($database, $conn);

2. Use "sqlsrv_connect ()" function

$server = 'localhost';
$username = 'sa';
$password = '';
$database = 'example_db';
$conn = sqlsrv_connect($server, array('UID'=>$username, 'PWD'=>$password, 'Database'=>$database));

3. Use PDO class connection

$server = 'localhost';
$username = 'sa';
$password = '';
$database = 'example_db';
try {
    $conn = new PDO("sqlsrv:Server=$server;Database=$database", $username, $password);
}
catch(PDOException $e) {
    die("Error connecting to SQL Server: " . $e->getMessage());
}

4. Use "odbc_connect()" function

$dsn = 'Driver={SQL Server};Server=localhost;Database=example_db';
$username = 'sa';
$password = '';
$conn = odbc_connect($dsn, $username, $password);

5. Use COM object method to connect

$conn = new COM('ADODB.Connection');
$dsn = 'Driver={SQL Server};Server=localhost;Database=example_db';
$conn->Open($dsn, 'sa', '');

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