Connect with PHP#

This example connects to PostgreSQL® service from PHP, making use of the built-in PDO module.

Variables#

These are the placeholders you will need to replace in the code sample:

Variable	Description
`POSTGRESQL_URI`	URL for PostgreSQL connection, from the service overview page

Pre-requisites#

For this example you will need:

Download CA certificates from the service overview page, this example assumes it is in a local file called ca.pem.

Note

Your PHP installation will need to include the PostgreSQL functions (most installations will have this already).

Code#

Add the following to index.php and replace the placeholder with the PostgreSQL URI:

<?php

$uri = "POSTGRESQL_URI";

$fields = parse_url($uri);

// build the DSN including SSL settings
$conn = "pgsql:";
$conn .= "host=" . $fields["host"];
$conn .= ";port=" . $fields["port"];;
$conn .= ";dbname=defaultdb";
$conn .= ";sslmode=verify-ca;sslrootcert=ca.pem";

$db = new PDO($conn, $fields["user"], $fields["pass"]);

foreach ($db->query("SELECT VERSION()") as $row) {
    print($row[0]);
}

This code creates a PostgreSQL client and opens a connection to the database. Then runs a query checking the database version and prints the response

Note

This example replaces the query string parameter to specify sslmode=verify-ca to make sure that the SSL certificate is verified, and adds the location of the cert.

To run the code:

php index.php

If the script runs successfully, the outputs should be the PostgreSQL version running in your service like:

PostgreSQL 13.3 on x86_64-pc-linux-gnu, compiled by gcc, a 68c5366192 p 6520304dc1, 64-bit