CodeIgniter Order by - PHP

When dealing with databases in web development, it is common to sort the results of queries in a specific order. This can be achieved using the ORDER BY clause in SQL. In CodeIgniter, we can use the order_by() method to sort query results.

Syntax

$this->db->order_by('column_name', 'ASC/DESC');

• column_name: the name of the column to sort by
• ASC/DESC: the order in which to sort the results (ASC for ascending and DESC for descending)

Example

Suppose we have a table called users with the following columns:

id  | name   | email             | age
--------------------------------------
1   | Alice  | alice@example.com | 25
2   | Bob    | bob@example.com   | 30
3   | Charlie| charlie@example.com| 20

To retrieve all users sorted by age in ascending order, we can use the following code:

$query = $this->db->order_by('age', 'ASC')->get('users');

To retrieve all users sorted by name in descending order, we can use the following code:

$query = $this->db->order_by('name', 'DESC')->get('users');

Final thoughts

The order_by() method is a quick and easy way to sort query results in CodeIgniter. It also allows for sorting by multiple columns and is flexible enough to handle most sorting needs.