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Applying limits and offsets in database queries is essential for controlling the number of records returned and fetching specific subsets of data.

In this tutorial, we’ll see the utilization of limit and offset in CodeIgniter 4 queries. These functionalities enable developers to restrict result sets to a specified number of records (limit) and skip a defined number of rows from the beginning of the result (offset), facilitating paginated data retrieval.

Let’s get started.

CodeIgniter 4 Installation

To create a CodeIgniter 4 setup run this given command into your shell or terminal. Please make sure composer should be installed.

composer create-project codeigniter4/appstarter codeigniter-4

Assuming you have successfully installed application into your local system.

Create Database

To create a database, either we can create via Manual tool of PhpMyadmin or by means of a mysql command.

We will use MySQL command to create database. Run this command into Sql tab of PhpMyAdmin.

CREATE DATABASE codeigniter4_app;

Successfully, we have created a database.

Database Connection

Open .env file from project root.

Search for DATABASE. You should see the connection environment variables into it. Put your updated details of database connection string values.

 
#--------------------------------------------------------------------
# DATABASE
#--------------------------------------------------------------------

database.default.hostname = localhost
database.default.database = codeigniter4_app
database.default.username = admin
database.default.password = admin
database.default.DBDriver = MySQLi
database.default.DBPrefix =
database.default.port = 3306

Now, database successfully connected with the application.

Environment (.env) Setup

When we install CodeIgniter 4, we will have env file at root. To use the environment variables means using variables at global scope we need to do env to .env

Either we can do via renaming file as simple as that. Also we can do by terminal command.

Open project in terminal

cp env .env

Above command will create a copy of env file to .env file. Now we are ready to use environment variables.

Enable Development Mode

CodeIgniter starts up in production mode by default. You need to make it in development mode to see any error if you are working with application.

Open .env file from root.

# CI_ENVIRONMENT = production

 // Do it to 
 
CI_ENVIRONMENT = development

Now application is in development mode.

Limit & Offset in Query Builder Approach

To use Query Builder in CodeIgniter 4, you need to create database instance first and then work with your tables & queries.

Database Instance

$this->db = db_connect();

Next,

Table Object

$builder = $this->db->table("posts");

Next,

Data Limit

Get total 10 records from table.

$builder->select('title, content, date');

$builder->limit(10);

$query = $builder->get();

$data = $query->getResult();

$builder->select('title, content, date');

$query = $builder->get(10);

$data = $query->getResult();

Data Limit & Offset

Get total 10 records starting from offset 20 of table.

$builder->select('title, content, date');

$builder->limit(10, 20);

$query = $builder->get();

$data = $query->getResult();

$builder->select('title, content, date');

$query = $builder->get(10, 20);

$data = $query->getResult();

Limit & Offset in Model Based Query Approach

To use Model Based Query Builder Approach in CodeIgniter 4, you need to create model instance first and then work with your queries.

Model Instance

$postObject = new Post();

Next,

Data Limit

Get total 10 records from table.

$postObject->select('title, content, date');

$postObject->limit(10);

$query = $postObject->get();

$data = $query->getResult();

$postObject->select('title, content, date');

$query = $postObject->get(10);

$data = $query->getResult();

Data Limit & Offset

Get total 10 records starting from offset 20 of table.

$postObject->select('title, content, date');

$postObject->limit(10, 20);

$query = $postObject->get();

$data = $query->getResult();

$postObject->select('title, content, date');

$query = $postObject->get(10, 20);

$data = $query->getResult();

That’s it.

We hope this article helped you to learn about How To Use Limit and Offset in CodeIgniter 4 Query Tutorial in a very detailed way.

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