What are the recommended ways to update old PHP scripts to adhere to current best practices?

Updating old PHP scripts to adhere to current best practices involves making changes to improve security, readability, and performance. Some recommended ways to update old PHP scripts include using PDO for database access instead of mysql functions, utilizing namespaces for better code organization, implementing object-oriented programming principles, and using prepared statements to prevent SQL injection attacks. 

// Example of updating old PHP script to use PDO for database access
// Old way using mysql functions
$conn = mysql_connect('localhost', 'username', 'password');
mysql_select_db('database_name', $conn);
$result = mysql_query('SELECT * FROM table_name');

// New way using PDO
$dsn = 'mysql:host=localhost;dbname=database_name';
$username = 'username';
$password = 'password';
try {
    $conn = new PDO($dsn, $username, $password);
    $stmt = $conn->query('SELECT * FROM table_name');
    while ($row = $stmt->fetch()) {
        // Process data
    }
} catch (PDOException $e) {
    echo 'Connection failed: ' . $e->getMessage();
}

Keywords

PHP script update security modernization

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