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How to delete data from database using CodeIgniter framework

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In this example we will discuss about how to delete a record or data from MySQL database using CodeIgniter framework PHP.

The DELETE statement is used to delete records from a table:

DELETE FROM table_name
WHERE some_column = some_value

Notice : The WHERE clause specifies which record or records that should be deleted. If you omit the WHERE clause, all records will be deleted!

The students table look like this:

id first name last name Email Id Action
1 Divyasundar Sahu divyasundar@gmail.com Delete
2 Hritika Sahu hritika@gmail.com Delete
3 Milan Jena milanjena@gmail.com Delete

Now i am going to delete the id=3 record.

For delete record we use 3 file here

  1. Crud.php Path: codeIgniter\application\controllers\Crud.php
  2. Crud_model.php Path: codeIgniter\application\models\Crud_model.php
  3. display_records.php Path: codeIgniter\application\view\display_records.php

Crud Sql Table

CREATE TABLE crud (
  `id` int(11) AUTO_INCREMENT PRIMARY KEY NOT NULL,
  `first_name` varchar(30) NOT NULL,
  `last_name` varchar(30) NOT NULL,
  `email` varchar(30) NOT NULL
);

Crud.php

<?php  
class Crud extends CI_Controller 
{
	public function __construct()
	{
	/*call CodeIgniter's default Constructor*/
	parent::__construct();
	
	/*load database libray manually*/
	$this->load->database();
	
	/*load Model*/
	$this->load->model('Crud_model');
	}
	public function displaydata()
	{
	$result['data']=$this->Crud_model->display_records();
	$this->load->view('display_records',$result);
	}
	/*Delete Record*/
public function deletedata()
{
  $id=$this->input->get('id');
  $response=$this->Crud_model->deleterecords($id);
  if($response==true){
    echo "Data deleted successfully !";
}
  else{
    echo "Error !";
  }
}
	
}
?>

Crud_model.php

<?php
class Crud_model extends CI_Model 
{
    /*Display*/
    function display_records()
  {
    $query=$this->db->get("crud");
    return $query->result();
  }
  function deleterecords($id)
  {
    $this->db->where("id", $id);
    $this->db->delete("crud");
    return true;
  }
}

display_records.php

<!DOCTYPE html>
<html>
<head>
<title>Delete records</title>
</head>
 
<body>
<table width="600" border="1" cellspacing="5" cellpadding="5">
  <tr style="background:#CCC">
    <th>Sr No</th>
    <th>First_name</th>
    <th>Last_name</th>
    <th>Email Id</th>
    <th>Delete</th>
    <th>Update</th>
  </tr>
  <?php
  $i=1;
  foreach($data as $row)
  {
  echo "<tr>";
  echo "<td>".$i."</td>";
  echo "<td>".$row->first_name."</td>";
  echo "<td>".$row->last_name."</td>";
  echo "<td>".$row->email."</td>";
  echo "<td><a href='deletedata?id=".$row->id."'>Delete</a></td>";
  echo "</tr>";
  $i++;
  }
  ?>
</table>
 
</body>
</html>

Now run the program on your browser with the below URL:

http://localhost/CodeIgniter/index.php/Crud/displaydata

After delete the record the table look like this.

id first name last name Email Id Action
1 Divyasundar Sahu divyasundar@gmail.com Delete
2 Hritika Sahu hritika@gmail.com Delete

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