Codeigniter framework is one of the most popular PHP frameworks today. It has gained a lot of popularity because of its efficiency and ease of use.
How to connect to the database in Codeigniter?
Codeigniter framework is one of the most popular PHP frameworks today. It has gained a lot of popularity because of its efficiency and ease of use. It is also quite simple to use and thus is a great choice for beginners. It does not have a complex architecture, which makes it easy to use. Codeigniter framework is built on a Model-View-Controller architecture. It also supports MVC architecture. The way to connect to a database using Codeigniter is easy. You just need to create a database connection and then create a model. These are the two most important steps. This article is going to tell you how to connect to the database in Codeigniter.
Things to be aware of when using the PHP CodeIgniter
In PHP CodeIgniter, the database connection details are stored in the database/connections.php file. The database connection details are not hardcoded into the main index.php file so that the database connection details can be easily changed. That means that there is a possibility that you can change the database connection details anywhere and everywhere in the application. For example, you can change the database connection details from the main index.php file, which means that any page that directly accesses the database will be affected by the change. Before you can do anything with a database in Codeigniter, you will need to connect to the database and retrieve your connection ID and password.
To retrieve data from a database, you must always connect your project to the database. Describes how to connect to a database with CodeIgniter and how to run queries against the database. The config folder contains a database.php file to connect to the database. You must define a username, password, and database name. You can specify which DB driver to use (e.g. MySQL, SQLite, etc.). This will connect to the database and run queries. Create a database on localhost, define tables and insert dummy data. Then you need to load this database into your model file. You can now access the query. Like other frameworks, you need to interact with the database frequently, but CodeIgniter simplifies this task. It provides rich functionality to interact with the database.
The purpose of connecting to your database in Codeigniter
After the manual installation of Codeigniter 4, Connecting to your database in Codeigniter is very easy, but it can be a bit confusing. Here is a simple way to do it: First, let’s go over how to connect to your database: $dbhost = ‘localhost’ ; $dbuser = ‘username’ ; $dbpass = ‘password’ ; $dbname = ‘yourdatabase’ ; $db = new mysqli ( $dbhost , $dbuser , $dbpass , $dbname ) ; // Now, it’s time to connect to the database: try { $db -> connect ( ) ; // This will throw an error if there are no errors! } catch ( PDOException $e ) { echo $e -> getMessage ( ) ; }
An important part of any application is connecting to the database. In all of your applications, you need to have a database connection. CodeIgniter makes this a bit easier to do by providing a few methods for you to use. In this blog, I’ll explain them and give you examples. Connecting to your database can be done by using $this->db->connect() or $this->db->connect(DB_HOST,DB_USER,DB_PASSWORD,DB_NAME) You can also use $this->db->create() to create a database.
Connect to database
You can connect to the database in two ways:
- Auto Login – You can perform auto login using the application/config/autoload.php file. An automatic connection loads the database for each page. Just add the database library.
- Manual connection – If you only need a database connection for a specific page, you can perform a manual connection. You can manually connect to the database.
Setup
Database connection information is defined in the application/config/database.php file.
- Open the application/config/database.php file.
- Sets the details of the first database in the $data[‘default’] array.
- Now make a copy of the $data[‘default’] array to define another database.
- Rename the default table key to something like database2. This key name is used to load the database.
- Configure the configuration.
How to load the database?
Manually load the database by calling the $this->load->database() method and set the new $data array key ($data[‘database2’]) as application/cofing/database.php . transmit it.
Pass the second parameter TRUE to get the login ID. Otherwise, no object instance is created.
Controller
Create a Main_model.php file in the application/models/ directory.
method definition –
- getRecords() Use $this->load->database() to load the database and initialize $db2.
- To select records from another database, use the $db2 object instead of $this->db.
Author BIO
Deepak Sharma working as Senior Back-End Developer in Devstringx Technologies. Devstringx counted among the best web and mobile app development companies in Noida, India. He holds 06 years of experience in PHP and Java. He has developed many projects with a variety of Technologies like Laravel, Codeigniter, slim, core PHP, WordPress, Shopify, Magento, and spring boot. He enjoys connecting with people and helping and empowering people through blogs.
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