Are there any potential drawbacks or situations where it is not advisable to use PDO for database connections in PHP?

One potential drawback of using PDO for database connections in PHP is that it may add unnecessary overhead to your code if you are only working with a single type of database. In such cases, using a more specialized extension like mysqli may be more efficient. 

// Example of using mysqli instead of PDO for MySQL database connection
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

Keywords

PDO database connections PHP limitations compatibility

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