What are the extensions in php

PHP has many extensions available to enhance its functionality and provide additional functionality. Here are some common PHP extensions:

1. MySQLi: Provides improved access to and manipulation of MySQL databases.

2. PDO: Provides a unified interface for PHP to access different types of databases.

3. GD: An extension for processing images, supporting the creation, manipulation and processing of images.

4. cURL: Extension for network communication with various protocols (e.g. HTTP, FTP).

5. JSON: Provides encoding and decoding functions for JSON format.

6. XML: Extensions for parsing and manipulating XML data.

7. Zip: Extension for creating and manipulating ZIP archives.

This is just a small selection of extensions available for PHP. Depending on your specific needs, you can choose appropriate extensions to enhance the functionality of PHP based on your project requirements. It's worth noting that extension availability may vary depending on PHP version and operating system, so make sure your environment meets the extension's requirements before using it.