Connecting to databases using PHP data access extensions such as MySQLi or PDO Mocktest

MySQLi (MySQL Improved) extension in PHP offers an improved interface for interacting with MySQL databases, providing both procedural and object-oriented approaches for database operations.

PDO (PHP Data Objects) is a PHP extension that stands for PHP Data Objects. It provides a consistent interface for accessing different databases, offering features such as prepared statements and transaction support.

MySQLi (MySQL Improved) extension in PHP is specific to MySQL databases and provides both procedural and object-oriented approaches for database operations, making it flexible and versatile.

One of the primary advantages of using PDO (PHP Data Objects) over MySQLi is its portability across different databases. PDO offers a consistent interface for accessing various database engines, making it easier to switch between databases without significant code changes.

PDO (PHP Data Objects) extension in PHP offers a consistent interface for accessing different database engines, including MySQL, PostgreSQL, SQLite, and more. This makes PDO suitable for projects requiring compatibility with multiple databases.

The mysqli_connect() function in PHP is used to establish a connection to a MySQL database server. It takes parameters such as hostname, username, password, and database name to establish the connection.

The mysqli_prepare() function in MySQLi extension is used to prepare an SQL statement for execution with parameters. Prepared statements help prevent SQL injection attacks and improve performance by allowing the same SQL statement to be executed repeatedly with different parameters.

The PDO::setAttribute() method in PDO extension is used to set attributes for the PDO connection, such as error handling, emulation mode, and fetch mode. It allows customization of PDO behavior according to specific requirements.

PDO (PHP Data Objects) extension in PHP supports various database drivers, including MySQL, PostgreSQL, SQLite, SQL Server, and more. However, MongoDB is not a supported database driver by PDO.

The PDO::query() method in PDO extension is used to execute an SQL statement. It can execute any SQL statement supported by the database server, including SELECT, INSERT, UPDATE, DELETE, and more.