How to use PostgreSQL database with CakePHP?

CakePHP is a PHP framework based on the MVC pattern that allows developers to easily build web applications. Although CakePHP uses a MySQL database by default, it also supports PostgreSQL, making it a database of choice. This article will introduce how to use the PostgreSQL database in the CakePHP framework.

Preparation:
Before you begin, you need to ensure that the PostgreSQL database has been installed and correctly configured. If not, download and install the latest PostgreSQL version. After the installation is complete, you will also need to create a database and database user.

Step 1: Install PostgreSQL extension
To use the PostgreSQL database in the CakePHP framework, you need to install the corresponding extension. You can install the extension by running the following command in a terminal window.

sudo apt-get install php-pgsql

On Windows systems, you can use the following command to install the extension.

composer require cakephp/cakephp-codesniffer

Step 2: Modify the database configuration
Find the config/app.php file. You need to update the following configuration to PostgreSQL database related content.

'datasources' => [
    'default' => [
        'className' => 'CakeDatabaseConnection',
        'driver' => 'CakeDatabaseDriverPostgres',
        'persistent' => false,
        'host' => 'localhost',
        'port' => '5432',
        'username' => '<your-database-username>',
        'password' => '<your-database-password>',
        'database' => '<your-database-name>',
        'encoding' => 'utf8',
        'timezone' => 'UTC',
        'flags' => [],
        'cacheMetadata' => true,
        'log' => false,
        'quoteIdentifiers' => false,
        'url' => env('DATABASE_URL', null),
    ],

Among them, you need to replace , and with your PostgreSQL database related information.

Step 3: Migrate the data table
Creating the database table is part of the migration tool using the CakePHP framework. You can run the migration script with the following command.

bin/cake migrations migrate

The above command will create a data table by executing the database migration script.

Summary:
In this article, we introduced how to create a web application in the CakePHP framework using a PostgreSQL database. You need to install the PostgreSQL extension and modify the database configuration file, and then run the migration script to create data tables in the database. After following the above steps, your CakePHP application is ready to use the PostgreSQL database.

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