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Forms and Input in CodeIgniter

Overview

Forms provide a way for users to interact with the application and submit data.

HTML is easy to understand and write, but CodeIgniter makes things even easier. CodeIgniter has built-in functions to build HTML forms.

$this->load->helper('form');

The following table shows the CodeIgniter functions for HTML tags:

No. HTML CodeIgniter
1 
<form>
 
<?php 
echo form_open('action', 'attributes'); 
?>
2 
</form>
 
<?php 
echo form_close(); 
?>
3 
<form enctype="multipart/form-data">
 
<?php 
echo form_open_multipart('action', 'attributes'); 
?>
4 
<input type="text">
 
<?php 
echo form_input(["type"=>"text"]); 
?>
5 
<input type="hidden">
 
<?php 
echo form_input(["type"=>"hidden"]); 
?>
6 
<textarea></textarea>
 
<?php 
echo form_textarea(["name"=>"textarea"]); 
?>
7 
<select></select>
 
<?php 
$array = ["data"=>"Data"];
echo form_dropdown(["name"=>"textarea","options"=>$array]); 
?>
8 
<select multiple></select>
 
<?php 
$array = ["data"=>"Data"];
echo form_multiselect(["name"=>"textarea","options"=>$array]); 
?>
9 
<input type="submit" />
 
<?php 
echo form_button(["type"=>"submit", "value"=>"Submit"]); 
?>

Form Example

<!DOCTYPE html>
<html lang="en">

<head>
	<title>Form in CodeIgniter</title>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css">
	<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
	<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"></script>
</head>

<body>
	<div class="container">
		<div class="row">
			<div class="col-sm-12">
				<?php 
				$attr = 'method="post"';
				echo form_open('contacts/add', $attr);
				?>
					<div class="form-group">
						<label for="name">Name:</label>
						<?php echo form_input(["type"=>"text", "name"=>"name", "id"=>"name", "class"=>"form-control"]); ?>
					</div>
					<div class="form-group">
						<label for="email">Email:</label>
						<?php echo form_input(["type"=>"email", "name"=>"email", "id"=>"email", "class"=>"form-control"]); ?>
					</div>
					<div class="form-group">
						<label for="country">Country:</label>
						<?php
						$country = ["India"=>"India", "US"=>"USA"];
						echo form_dropdown(["name"=>"country", "id"=>"country", "options"=>$country, "class"=>"form-control"]);
						?>
					</div>
					<div class="form-group">
						<?php echo form_button(["type"=>"submit", "name"=>"submit", "id"=>"submit", "class"=>"btn btn-primary", "content"=>"Submit"]); ?>
					</div>
				</form>
			</div>
		</div>
	</div>
</body>

</html>
Form example
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