What databases does PDO support

Numerous databases, such as SQL Server, MySQL, SQLite, PostgreSQL, and others, are supported by PDO.

You can use PDO::getAvailableDrivers() to obtain the drivers that are currently installed on your system.

You can use the php_odbc or pdo_odbc drivers to access Netezza.

In PDO, the parameter cannot be used with table names.

You can send the PDOExtended class by reference to extend the PDO classes and PDOStatement.

Although PDO does not have a feature to display the completed query string with parameters passed, debugging can be done using a function similar to build_pdo_query().

Make sure that all PDO drivers are built as shared modules when you recompile PHP with PDO as a shared module.

The prepare() and execute() functions can be combined into a single function, such as sprintf().

With the PDO::PARAM_INPUT_OUTPUT flag, you can use bindParam() to retrieve output variables from an MSSQL stored procedure.

It might be necessary to omit the host= and port= portions of the connection string in order to connect to a PostgreSQL database.

When streaming a mime typed object from the database, you might need to use buffer control because not all PDO drivers return a LOB as a file stream.

You can set the charset option to UTF-8 when creating the PDO connection in order to retrieve UTF8 data from MSSQL.

Now let’s explore whether PDO supports MySQL.

The PHP Data Objects (PDO) interface is implemented by the PDO_MYSQL driver, which makes it possible to access MySQL databases from PHP.

By default, PDO_MYSQL uses emulated prepares.

There is support for the caching_sha2_password plugin with the mysql_xdevapi extension.

PDO::PARAM_INPUT_OUTPUT via PDOStatement::bindParam() is not properly supported by the MySQL driver; although such parameters can be used, they are not updated (that is, the actual output is ignored).

PHP is available in installable binary versions in most common Unix distributions. While the MySQL extensions are normally supported when building these binary versions, an additional package may be required to install the extension libraries.

The PHP extensions ext/mysql, ext/mysqli, and PDO_MYSQL are installed by the php5-mysql package on Ubuntu and the php-mysql package on CentOS.

To install the PDO MySQL extension during compilation, use --WITH-PDO-MYSQL[=DIR], where the optional [=DIR] denotes the MySQL base library.

However, what about PDO’s database connection mechanism?

By constructing instances of the PDO base class, connections are made.

The constructor takes parameters that specify the DSN (database source) and, if applicable, the username and password.

A PDOException object will be thrown in the event of any connection errors.

An instance of the PDO class is returned to your script after the database connection is established successfully.

For the duration of that PDO object, the connection is still open.

You must destroy the object and make sure that all references to it are removed in order to break the connection.

The establishment of persistent connections to database servers will be advantageous for many web applications.

Let’s see if PDO or MySQL is better for me.

Specifically created for MySQL databases, mysqli (MySQL Improved) provides both a traditional procedural interface and an object-oriented interface. Additionally, prepared statements are supported, which may aid in thwarting SQL injection attacks.

The following are some benefits of using mysqli:

  • It has an object-oriented and procedural interface;
  • It is optimized for MySQL databases and may provide better performance when handling large amounts of data.

Using PDO has several benefits, such as:

  • It offers an object-oriented interface and prepared statements support;
  • It offers a consistent interface for working with various database types using a variety of database drivers.

PDO might be a better option if you need to work with multiple types of databases or want a consistent interface, but generally, if you’re only working with MySQL databases and performance is a major concern, you might lean towards using mysqli.

Let’s investigate the databases that PHP supports.

Numerous database management systems, such as MySQL, MariaDB, Db2, MongoDB, Oracle, PostgreSQL, and SQLite, are supported by PHP.

PHP offers three extensions—mysqli, mysqlInd, and pdo_mysql—for connecting to MySQL.

You can add the following SQL statements to PHP CRUD functions to work with MySQL database records by using MySQL extensions in PHP scripts: INSERT, UPDATE, and DELETE.

Use a prepared query that creates placeholders for the query statement’s parameters and then binds values to those placeholders to prevent SQL injection.

The widely used LAMP stack, which consists of a set of components that enable the development and deployment of dynamic web applications, includes MySQL and PHP as essential elements.