Online Web Development Tutorials

In this section, We'll go through the basic form validation concepts in CodeIgniter Framework.

In order to implement form validation you'll need three things:

A View file containing a form.
A View file containing a "success" message to be displayed upon successful submission.
A controller method to receive and process the submitted data.

Using a text editor, create a controller called Form.php. In it, place this code and save it to your application/controllers/ directory:

<?php
  
   class Form extends CI_Controller { 
	
      public function index() { 
         /* Load form helper */ 
         $this->load->helper(array('form'));
			
         /* Load form validation library */ 
         $this->load->library('form_validation');
			
	 /* Validation rule */
	 $this->form_validation->set_rules('name', 'Name', 'required');
	 $this->form_validation->set_rules('email', 'Email', 'required|valid_email');
	 $this->form_validation->set_rules('password', 'Password', 'required');		 
			
         if ($this->form_validation->run() == FALSE) { 
            $this->load->view('form'); 
         } 
         else {
		    $success = "Submit successfully!"; 
                    $this->load->view('form', compact('success')); 
         } 
      }
   }
?>

Using a text editor, create a form called form.php. In it, place this code and save it to your application/views/ directory:

<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
  <div class="col-md-2"></div>
     <div class="col-md-8" style="margin-top:20px">
	    <?php
		   echo form_open('form/index');
		   echo validation_errors();
		   if (isset($success))
		   echo '<p>'.$success.'</p>';
	    ?>
		<div class="form-group">
			<label for="email">Name:</label>
			<input type="text" id="name" name="name" />
		</div>
		<div class="form-group">
			<label for="email">Email:</label>
			<input type="text" id="email" name="email" />
		</div>
		<div class="form-group">
			<label for="email">Password:</label>
			<input type="password" id="password" name="password" />
		</div>
		<button type="submit" class="btn btn-success">Submit</button>
		<?php 
		echo form_close(); 
		?>
		</div>
	 <div class="col-md-2"></div>
	</body>
</html>

To try your form, visit your site using a URL similar to this one:

http://localhost/codeigniter/index.php/form/index

It will produce the following screen:

CodeIgniter Form Validation