This tutorial we explained how to create form using codeIgniter framework. Now, we will explain you to validate various form fields using codeIgniter framework.
In Controller file we have create a class named “validate_ctrl” where index() function initializes “form_validation” library :
function index()
{
//including validation library
$this->load->library('form_validation');
}
Also, using above library we set some validation rules for each fields.
To set validation rules we will use the set_rules() function :
$this->form_validation->set_rules();
which takes three parameters :
1. Actual field name (e.g. uname).
2. Name of the field used to identify it (e.g. Username).
3. Validation rules for the form field.
$this->form_validation->set_rules('uname', 'Username', 'required');
The third parameter can be set for multiple rules like this :
$this->form_validation->set_rules('uname', 'Username', 'required|min_length[4]|max_length[10]);
Here are some listing of the rules with their specification :
required // Returns FALSE if the form field is empty.
matches // Returns FALSE if the form field does not match the defined value of parameter.
is_unique // Returns FALSE if the form field is not unique to the table and field name in the parameter.
min_length // Returns FALSE if the form field is shorter than the parameter value.
max_length // Returns FALSE if the form field is longer than the parameter value.
exact_length // Returns FALSE if the form field is not exactly the parameter value.
greater_than // Returns FALSE if the form field is less than the parameter value or not numeric.
less_than // Returns FALSE if the form field is greater than the parameter value or not numeric.
alpha // Returns FALSE if the form field contains anything other than alphabetical characters.
alpha_numeric // Returns FALSE if the form field contains anything other than alpha-numeric characters.
alpha_dash // Returns FALSE if the field contains anything other than alpha-numeric characters, underscores or dashes.
numeric // Returns FALSE if the form field contains anything other than numeric characters.
integer // Returns FALSE if the form field contains anything other than an integer.
decimal // Returns FALSE if the form field contains anything other than a decimal number.
is_natural // Returns FALSE if the form field contains anything other than a natural number.
is_natural_no_zero // Returns FALSE if the form field contains anything other than a natural number, but not zero.
valid_email // Returns FALSE if the form field does not contain a valid email address.
valid_emails // Returns FALSE if any value provided in a comma separated list is not a valid email.
valid_ip // Returns FALSE if the supplied IP is not valid.
valid_base64 // Returns FALSE if the supplied string contains anything other than valid Base64 characters.
VIEW FILE: valform.php
copy the below code in your view.
<!DOCTYPE html>
<html>
<head>
<title>Validating Form Fields Using CodeIgniter</title>
<link href='http://fonts.googleapis.com/css?family=Marcellus' rel='stylesheet' type='text/css'>
<link href="http://localhost/CodeIgniter/css/styles.css" rel="stylesheet" type="text/css">
</head>
<body>
<div id="container">
<?php echo form_open('validate_ctrl'); ?>
<h1>Validating form fields using CodeIgniter</h1>
<?php echo form_label('Student Name :'); ?><?php echo form_error('dname'); ?>
<?php echo form_input(array('id' => 'dname', 'name' => 'dname')); ?>
<?php echo form_label('Student Email :'); ?> <?php echo form_error('demail'); ?>
<?php echo form_input(array('id' => 'demail', 'name' => 'demail')); ?>
<?php echo form_label('Student Mobile No. :'); ?> <?php echo form_error('dmobile'); ?>
<?php echo form_input(array('id' => 'dmobile', 'name' => 'dmobile','placeholder'=>'10 Digit Mobile No.')); ?>
<?php echo form_label('Student Address :'); ?> <?php echo form_error('daddress'); ?>
<?php echo form_input(array('id' => 'daddress', 'name' => 'daddress')); ?>
<?php echo form_submit(array('id' => 'submit', 'value' => 'Submit')); ?> <?php echo form_close(); ?>
</div>
</body>
</html>
CONTROLLER FILE: validate_ctrl.php
copy the below code in your controller.
<?php
class validate_ctrl extends CI_Controller {
function __construct() {
parent::__construct();
$this->load->model('form_model');
}
function index()
{
// Including Validation Library
$this->load->library('form_validation');
// Displaying Errors In Div
$this->form_validation->set_error_delimiters('<div class="error">', '</div>');
// Validation For Name Field
$this->form_validation->set_rules('dname', 'Username', 'required|min_length[5]|max_length[15]');
// Validation For Email Field
$this->form_validation->set_rules('demail', 'Email', 'required|valid_email');
// Validation For Contact Field
$this->form_validation->set_rules('dmobile', 'Contact No.', 'required|regex_match[/^[0-9]{10}$/]');
// Validation For Address Field
$this->form_validation->set_rules('daddress', 'Address', 'required|min_length[10]|max_length[50]');
if ($this->form_validation->run() == FALSE)
{
$this->load->view('valform');
}
else
{
$this->load->view('formsubmit');
}
}
}
?>
CSS FILE: styles.css
Styling HTML Elements.
#container {
width:960px;
height:610px;
margin:50px auto
}
.error {
color:red;
font-size:13px;
margin-bottom:-15px
}
form {
width:320px;
padding:0 50px 20px;
background:linear-gradient(#fff,#CBCE80);
border:1px solid #ccc;
box-shadow:0 0 5px;
font-family:'Marcellus',serif;
float:left;
margin-top:10px
}
h1 {
text-align:center;
font-size:28px
}
hr {
border:0;
border-bottom:1.5px solid #ccc;
margin-top:-10px;
margin-bottom:30px
}
label {
font-size:17px
}
input {
width:100%;
padding:10px;
margin:6px 0 20px;
border:none;
box-shadow:0 0 5px
}
input#submit {
margin-top:20px;
font-size:18px;
background:linear-gradient(#22abe9 5%,#36caf0 100%);
border:1px solid #0F799E;
color:#fff;
font-weight:700;
cursor:pointer;
text-shadow:0 1px 0 #13506D
}
input#submit:hover {
background:linear-gradient(#36caf0 5%,#22abe9 100%)
}
----------------------------------------------
Author : Mariatulkibtiah
Source : http://www.formget.com/
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