To execute basic queries with PHP and retrieve data from the PostgreSQL database, you need to use the pg_query() function. Finally, use the pg_free_result() function to free the memory used by the result object. You can use the pg_fetch_assoc() function to fetch each row of data from the result object and process it. The pg_query() function takes the connection object and the SQL query as parameters and returns a result object. For example, to retrieve all records from a table named albums, you can use the following code: $result = pg_query($conn, "SELECT * FROM albums") Once you have established a connection to the database, you can execute SQL queries using the pg_query() function. Replace localhost with the hostname or IP address of the PostgreSQL server, 5432 with the port number of the PostgreSQL server, jazz_music with the name of the database you created, jazz_user with the name of the user you created, and your_password with the password you set for the user. For example: $conn = pg_connect("host=localhost port=5432 dbname=jazz_music user=jazz_user password=your_password") The connection string specifies the host, port, database name, user, and password. To connect to PostgreSQL, you can use the pg_connect() function, which takes a connection string as a parameter. Here’s how you can connect to PostgreSQL from PHP and execute basic queries to retrieve data from the jazz_music database: To connect to PostgreSQL from PHP, you need to use the PostgreSQL extension for PHP, which provides a set of functions to interact with PostgreSQL databases. In the next section, we will learn how to connect to PostgreSQL from PHP and execute basic queries to retrieve data from the database. Now, you have created a database and a user to access it. ![]() Grant all privileges to the user for the jazz_music database using the following SQL command: GRANT ALL PRIVILEGES ON DATABASE jazz_music TO jazz_user įinally, connect to the jazz_music database as the jazz_user user using the following command: \c jazz_music jazz_user To do this, execute the following SQL command: CREATE USER jazz_user WITH PASSWORD 'your_password' Next, create a user named jazz_user with a password of your choice. Then, execute the following SQL command to create a database named jazz_music: CREATE DATABASE jazz_music To create a database for storing jazz music data, log in to PostgreSQL as the default superuser postgres. To connect to PostgreSQL from PHP, you first need to create a database and a user with appropriate permissions. Once you have installed PostgreSQL and PHP, you can move on to creating a PostgreSQL database and user.
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