MySQL Like Operator in CodeIgniter 4 Query Builder Tutorial

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CodeIgniter 4 provides the complete set of Query builder methods to use in querying database. Inside this article we will see the concept of MySQL Like Operator in codeigniter 4 Query builder.

In Query builder to use Like operator we have a method available. Like operator helps us to get data with a certain pattern with a different different string format.

MySQL Like Operator uses % or _ in query to create pattern. % represents multiple characters, _ is for single character.

In CodeIgniter, It uses only % to create search patterns.

Learn More –

Note*: For this article, CodeIgniter v4.1 setup has been installed. May be when you are seeing, version will be updated. CodeIgniter 4.x still is in development mode.

Let’s get started.


Create Database & Table in Application

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

CREATE DATABASE codeigniter4_app;

Next, we need a table. That table will be responsible to store data. Let’s create a table with some columns.

CREATE TABLE `students` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `name` varchar(50) NOT NULL,
 `email` varchar(50) NOT NULL,
 `phone_no` varchar(15) NOT NULL,
 PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

Successfully, we have created a database and a table.


Dump Test Data To Table

Open MySQL database and run this command to insert test data into table.

--
-- Dumping data for table `students`
--

INSERT INTO `students` (`id`, `name`, `email`, `phone_no`) VALUES
(1, 'Sanjay Kumar', 'sanjay_kumar@gmail.com', '8527419630'),
(2, 'Sanjay Mishra', 'sanjaymishra1001@yahoo.com', '7456321089'),
(3, 'Rahul Khanna', 'rahulkhanna@yahoo.com', '9632145870'),
(4, 'Vijay Singh', 'vijay_singh@gmail.com', '7896541230'),
(5, 'Suraj Lal', 'suraj_lal@outlook.com', '7894563210'),
(6, 'Dhananjay Kumar', 'dhananjay_kumar@outlook.com', '8529633217');

Here, we have few rows taking to understand the concept of like() method. You can consider many more rows.


CodeIgniter 4 Like Operator Method

In CodeIgniter 4, like() named method available to do like pattern queries.

$builder->like('column_name','match', 'before | after | both')

Example #1

Task

We want to list all students whose name starts from S character.

MySQL Query

SELECT * FROM students WHERE name LIKE 'S%'

Writing in CodeIgniter 4

We will use query builder methods for this.

Like Method syntax –

$builder->like('name','S', 'after'); 

It generates query as –

WHERE `name` LIKE 'S%' ESCAPE '!'
<?php

namespace App\Controllers;

class Home extends BaseController
{
	public function __construct()
	{
		$this->db = db_connect();
	}

	public function index()
	{
		$builder = $this->db->table("students");

		$builder->select('*');
		$builder->like('name','S','after');
		$query = $builder->get();

		echo "<pre>";
		print_r($query->getResult());
      
        // To get last query executed
        // $this->db->getLastQuery();
	}
    
    //...
}

Behind the scene it will generate query as –

SELECT * FROM `students` WHERE `name` LIKE 'S%' ESCAPE '!'

If we run this query to MySQL –

Output To Browser

Example #2

Task

We want to list all students whose email ends with yahoo.com

MySQL Query

SELECT * FROM students WHERE email LIKE '%yahoo.com'

Writing in CodeIgniter 4

We will use query builder methods for this.

Like Method syntax –

$builder->like('email','yahoo.com', 'before'); 

It generates query as –

WHERE `email` LIKE '%yahoo.com' ESCAPE '!'
<?php

namespace App\Controllers;

class Home extends BaseController
{
	public function __construct()
	{
		$this->db = db_connect();
	}

	public function index()
	{
		$builder = $this->db->table("students");

		$builder->select('*');
		$builder->like('email','yahoo.com','before');
		$query = $builder->get();

		echo "<pre>";
		print_r($query->getResult());
      
        // To get last query executed
        // $this->db->getLastQuery();
	}
    
    //...
}

Behind the scene it will generate query as –

SELECT * FROM `students` WHERE `email` LIKE '%yahoo.com' ESCAPE '!'

If we run this query to MySQL –

Output To Browser

Example #3

Task

We want to list all students whose phone number contains 321 in digits.

MySQL Query

SELECT * FROM students WHERE phone_no LIKE '%321%'

Writing in CodeIgniter 4

We will use query builder methods for this.

Like Method syntax –

$builder->like('phone_no','%321%', 'both'); 

It generates query as –

WHERE `phone_no` LIKE '%321%' ESCAPE '!'
<?php

namespace App\Controllers;

class Home extends BaseController
{
	public function __construct()
	{
		$this->db = db_connect();
	}

	public function index()
	{
		$builder = $this->db->table("students");

		$builder->select('*');
		$builder->like('phone_no','321','both');
		$query = $builder->get();

		echo "<pre>";
		print_r($query->getResult());
      
        // To get last query executed
        // $this->db->getLastQuery();
	}
    
    //...
}

Behind the scene it will generate query as –

SELECT * FROM `students` WHERE `phone_no` LIKE '%321%' ESCAPE '!'

If we run this query to MySQL –

Output To Browser

Example #4

Task

We want to list all students whose name starts from S OR phone number contains 321 in digits.

Any condition will true then it returns a data row.

MySQL Query

SELECT * FROM students WHERE name LIKE 'S%' OR phone_no LIKE '%321%'

Writing in CodeIgniter 4

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

$builder->select('*');
$builder->like('name','S','after');
$builder->orLike('phone_no','321','both');
$query = $builder->get();

Example #5

Task

We want to list all students whose phone number doesn’t contains 321 in digits.

MySQL Query

SELECT * FROM students WHERE phone_no NOT LIKE '%321%'

Writing in CodeIgniter 4

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

$builder->select('*');
$builder->notLike('phone_no','321','both');
$query = $builder->get();

We hope this article helped you to learn MySQL Like Operator in CodeIgniter 4 Query Builder Tutorial in a very detailed way.

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