Database connectivity from MySQL to CI?
.........................................................................................
steps1st:-
create database and table from MySQL database using PHPMyAdmin
step2nd:-
open project folder and edit config/database.php
and edit username, password, database
username=root
password=' '
database= dbname
step3rd:-
create controller and load view and create an action method in the controller
step4th
create view form according to the table in the view file
step5th
create a model class and define a method for data insertion under the model folder
class Modelname extends CI_Model
{
function methodname()
{
}
}
step6:-
load database.php file under model class constructor
function __construct()
{
parent::__construct();
$this->load->database();
}
step7:-
create a method on the model and write data insertion code
step8:-
call model method from the controller action method.
first load model then call a model class method
$this->load->model('modelname');
$this->modelname->met hod(param,..)
Show record
9) create another method in the controller and load view
10) create another method in the model and write data selection code
11) call a model method from the controller
12) send model data into view from the controller
Complete Code for Data Operation
Code of Database.php what will be changed:
'hostname' => 'localhost',
'username' => 'root',
'password' => '',
'database' => 'phpdb2',
Code of Controller:-
<?php
class Student extends CI_Controller
{
function index()
{
$this->load->view('stuview');
}
function stuadd()
{
$this->load->model('Stumodel');
$r = $this->input->post('txtrno');
$s = $this->input->post('txtname');
$b = $this->input->post('txtbranch');
$f = $this->input->post('txtfees');
$res=$this->Stumodel->stuinsert($r,$s,$b,$f);
if($res==1)
$data['res']= "data inserted successfully";
else
$data['res']= "problem in insertion";
$this->load->view('stuview',$data);
}
function stushow()
{
$this->load->model('Stumodel');
$data['res']=$this->Stumodel->showstudent();
$this->load->view('viewstudent',$data);
}
}
?>
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Code of View:-
....................................................................................................
stuview.php
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<h1>Welcome in Student Information</h1>
<form action="<?php echo site_url(); ?>/Student/stuadd" method="post">
<input type="text" name="txtrno" placeholder="enter rno" />
<br>
<br>
<input type="text" name="txtname" placeholder="enter name" />
<br>
<br>
<input type="text" name="txtbranch" placeholder="enter branch" />
<br>
<br>
<input type="text" name="txtfees" placeholder="enter fees" />
<br>
<br>
<input type="submit" name="btnsubmit" value="Insert" />
</form>
<?php
echo @$res;
?>
</body>
</html>
Code for Display View:-
viewstudent.php
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<center>
<h1>Student Information</h1>
<?php
//print_r($res);
echo "<table border='1'><tr><th>Rno</th><th>Sname</th><th>Branch</th><th>Fees</th></tr>";
foreach($res as $k)
{
echo "<tr>";
foreach ($k as $v) {
echo "<td>$v"."</td>";
}
echo "</tr>";
}
echo "</table>";
?>
</center>
</body>
</html>
Code of Complete Model Class:-
<?php
class Stumodel extends CI_Model
{
function __construct()
{
parent::__construct();
$this->load->database();
}
function stuinsert($r,$s,$b,$f)
{
$this->db->insert('student',array('rno'=>$r,'name'=>$s,'branch'=>$b,'fees'=>$f));
return $this->db->affected_rows();
}
function showstudent()
{
$res = $this->db->get('student');
return $res->result_array();
}
}
?>
Database Schema:-
.........................................................................................
steps1st:-
create database and table from MySQL database using PHPMyAdmin
step2nd:-
open project folder and edit config/database.php
and edit username, password, database
username=root
password=' '
database= dbname
step3rd:-
create controller and load view and create an action method in the controller
step4th
create view form according to the table in the view file
step5th
create a model class and define a method for data insertion under the model folder
class Modelname extends CI_Model
{
function methodname()
{
}
}
step6:-
load database.php file under model class constructor
function __construct()
{
parent::__construct();
$this->load->database();
}
step7:-
create a method on the model and write data insertion code
step8:-
call model method from the controller action method.
first load model then call a model class method
$this->load->model('modelname');
$this->modelname->met hod(param,..)
Show record
9) create another method in the controller and load view
10) create another method in the model and write data selection code
11) call a model method from the controller
12) send model data into view from the controller
Complete Code for Data Operation
Code of Database.php what will be changed:
'hostname' => 'localhost',
'username' => 'root',
'password' => '',
'database' => 'phpdb2',
Code of Controller:-
<?php
class Student extends CI_Controller
{
function index()
{
$this->load->view('stuview');
}
function stuadd()
{
$this->load->model('Stumodel');
$r = $this->input->post('txtrno');
$s = $this->input->post('txtname');
$b = $this->input->post('txtbranch');
$f = $this->input->post('txtfees');
$res=$this->Stumodel->stuinsert($r,$s,$b,$f);
if($res==1)
$data['res']= "data inserted successfully";
else
$data['res']= "problem in insertion";
$this->load->view('stuview',$data);
}
function stushow()
{
$this->load->model('Stumodel');
$data['res']=$this->Stumodel->showstudent();
$this->load->view('viewstudent',$data);
}
}
?>
.............................................*....................................................................
Code of View:-
....................................................................................................
stuview.php
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<h1>Welcome in Student Information</h1>
<form action="<?php echo site_url(); ?>/Student/stuadd" method="post">
<input type="text" name="txtrno" placeholder="enter rno" />
<br>
<br>
<input type="text" name="txtname" placeholder="enter name" />
<br>
<br>
<input type="text" name="txtbranch" placeholder="enter branch" />
<br>
<br>
<input type="text" name="txtfees" placeholder="enter fees" />
<br>
<br>
<input type="submit" name="btnsubmit" value="Insert" />
</form>
<?php
echo @$res;
?>
</body>
</html>
Code for Display View:-
viewstudent.php
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<center>
<h1>Student Information</h1>
<?php
//print_r($res);
echo "<table border='1'><tr><th>Rno</th><th>Sname</th><th>Branch</th><th>Fees</th></tr>";
foreach($res as $k)
{
echo "<tr>";
foreach ($k as $v) {
echo "<td>$v"."</td>";
}
echo "</tr>";
}
echo "</table>";
?>
</center>
</body>
</html>
Code of Complete Model Class:-
<?php
class Stumodel extends CI_Model
{
function __construct()
{
parent::__construct();
$this->load->database();
}
function stuinsert($r,$s,$b,$f)
{
$this->db->insert('student',array('rno'=>$r,'name'=>$s,'branch'=>$b,'fees'=>$f));
return $this->db->affected_rows();
}
function showstudent()
{
$res = $this->db->get('student');
return $res->result_array();
}
}
?>
Database Schema:-
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