How can the use of functions like db() impact the performance of PHP scripts?

Using functions like db() can impact the performance of PHP scripts because they add an extra layer of abstraction and can introduce overhead due to function calls. To improve performance, consider directly accessing the database connection object or using a more efficient database abstraction layer. 

// Directly accessing the database connection object
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

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

// Perform database operations directly using $conn

Keywords

functions db() performance PHP scripts impact

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