# PostgreSQL Functions (PDO_PGSQL)

## Introduction

PDO_PGSQL is a driver that implements the PHP Data Objects (PDO) interface to enable access from PHP to PostgreSQL databases.

## Resource Types

This extension defines a stream resource returned by PDO::pgsqlLOBOpen().

## Table of Contents

- PDO_PGSQL DSN — Connecting to PostgreSQL databases
- PDO::pgsqlLOBCreate — Creates a new large object
- PDO::pgsqlLOBOpen — Opens an existing large object stream
- PDO::pgsqlLOBUnlink — Deletes the large object