Using this pdf one can easily understand insert update delete in Codeigniter in PHP.

1. Created by Vineet Kumar Saini
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Add-Edit-Delete in Codeigniter in PHP
First of all we create a database i.e. company
CREATE DATABASE `company`;
Now we will create a table i.e. registration
CREATE TABLE `company`.`registration` (
`id` INT( 5 ) NOT NULL AUTO_INCREMENT ,
`name` VARCHAR( 100 ) NOT NULL ,
`email` VARCHAR( 100 ) NOT NULL ,
`address` VARCHAR( 255 ) NOT NULL ,
`phone` VARCHAR( 12 ) NOT NULL ,
PRIMARY KEY ( `id` )
) ENGINE = InnoDB;
Now set the database name in the database.php file in codeigiter
Application folder -> config folder -> database.php
$db['default']['hostname'] = 'localhost';
$db['default']['username'] = 'root';
$db['default']['password'] = '';
$db['default']['database'] = 'company';
Now we will create a controller i.e. emp.php in the controller folder
<?php
class emp extends CI_Controller
{
/* public function __construct() //php5 Constructor
{
parent::__construct();
$this->load->helper('url');
$this->load->model('emp_model');
}
*/ function emp() //php4 Constructor by class name
{
parent::CI_Controller();
$this->load->helper('url');
$this->load->model('emp_model');
}
function GetAll()

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{
$data['query']=$this->emp_model->emp_getall();
$this->load->view('emp_viewall',$data);
}
public function operation()
{
if(isset($_POST['btn']))
{
if(empty($_POST['id']))
{
$this->add_new_data();
}
else
{
$this->updating();
}
}
}
function add_new()
{
$this->load->view('form');
}
public function add_new_data()
{
$this->emp_model->add_data();
$this->GetAll();
}
public function update($id)
{
// $id=$this->input->get('id'); Get id from query string
$data['value']=$this->emp_model->get_data_id($id);
$this->load->view('form',$data);
}
public function updating()
{
$this->emp_model->update_data();
$this->GetAll();
}
public function delete($id)
{
//echo $id;exit;
$this->load->model('emp_model');

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$delete=$this->emp_model->delete_data($id);
$this->GetAll();
}
}
?>
Now we create a model emp_model.php in the model folder
<?php
class Emp_model extends CI_Model
{
function Emp_model()
{
parent::CI_Model();
$this->load->database();
}
function emp_getall()
{
$query=$this->db->get('registration');
return $query->result();
}
function add_data()
{
$name=$_POST['name'];
$email=$_POST['email'];
$address=$_POST['address'];
$phone=$_POST['phone'];
$value=array('name'=>$name,'email'=>$email,'address'=>$address,'phone'=>$phone);
$this->db->insert('registration',$value);
//ECHO "Succesfully Inserted?";
}
function delete_data($id)
{
$delete = "delete from registration where id='$id'";
$this->db->query($delete);
}
/* OR
function delete_data($id)
{
$this->db->delete('registration',array('id'=>$id));
}*/
function get_data_id($id)

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{
$query = $this->db->get_where('registration',array('id' => $id),1);
return $query;
}
function update_data()
{
$id=$_POST['id'];
$name=$_POST['name'];
$email=$_POST['email'];
$address=$_POST['address'];
$phone=$_POST['phone'];
$value= array('name'=>$name,'email'=>$email,'address'=>$address,'phone'=>$phone);
$this->db->update('registration',$value,array('id' => $id));
//ECHO "Succesfully Inserted?";
}
}
?>
Now we create a views i.e emp_viewall.php in the views folder
<center>
<h3>
<u>Display Data From Database Using Codeigniter in PHP</u></h3>
<table cellspacing="0" cellpadding="2" border="1" width="50%">
<tr>
<th>S.No</th>
<th>Name</th><th>Email</th><th>Address</th>
<th>phone</th><th>&nbsp;</th><th>&nbsp;</th>
</tr>
<?php
$i=1;
foreach($query as $row)
{
?>
<tr>
<td><?php echo $i; ?></td>
<td><?php echo $row->name; ?></td>
<td><?php echo $row->email; ?></td>
<td><?php echo $row->address; ?></td>
<td><?php echo $row->phone; ?></td>
<td><a href="<?php echo base_url().'/index.php/emp/update/'.$row->id;

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>">Edit</a></td>
<td><a href="<?php echo base_url().'/index.php/emp/delete/'.$row->id;
?>">Delete</a></td>
</tr>
<?php
$i++;
}
?>
<tr><td colspan="7"><a href="<?php echo base_url();?>/index.php/emp/add_new">Add
New</a></td></tr>
</table>
</br>
</center>
Now we create another views i.e form.php for updating data in the views folder
<?php
$name='';
$email='';
$address='';
$phone='';
$id='';
$submit='Add User';
if(isset($value) && !empty($value))
{
foreach($value->result() as $row)
{
$name=$row->name;
$email=$row->email;
$address=$row->address;
$phone=$row->phone;
$id=$row->id;
$submit='Update User';
}
}
?>
<html>
<head></head>
<body>
<form name="ajaxform" id="ajaxform" action="<?php echo base_url().'/index.php/emp/operation'?>"
method="POST">
<table border="1">

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<tr>
<th>Name</th>
<td><input type="text" name="name" value="<?php echo $name; ?>"/></td>
</tr>
<tr>
<th>Email </th>
<td><input type="text" name="email" value="<?php echo $email; ?>"/></td>
</tr>
<tr>
<th>Address</th>
<td><input type="text" name="address" value="<?php echo $address; ?>" /></td>
</tr>
<tr>
<th>Phone</th>
<td><input type="text" name="phone" value="<?php echo $phone; ?>" /></td>
</tr>
</table>
<input type="hidden" name="id" value="<?php echo $id; ?>" />
<input type="hidden" id="btn" value="<?php echo $submit; ?>" name="btn"/>
<input type="submit" id="simple-post" value="<?php echo $submit; ?>" name="simple-post"/>
</form>
</body>
</html>
Output
Run the code using following url in your browser
http://localhost/projectname/index.php/emp/GetAll
Thanks!!