Fatal error: Call to undefined function form_open() in codeigniter with loading the following view file | Learning Curve- Perfect Tutorial for the beginers

<?php 
echo form_open('test/save', array('id'=>'frm')); 

?>

<h5>Username</h5>
<input type="text" name="username" value="<?php echo set_value('username'); ?>" size="50" />

<h5>Email Address</h5>
<input type="text" name="email" value="<?php echo set_value('email'); ?>" size="50" />

<div><input type="submit" value="Submit" /></div>

</form>

<?php

echo form_open('test/save', array('id'=>'frm'));

<h5>Username</h5>

<h5>Email Address</h5>

</form>

while running the above view page using controller function it throws the below error
Fatal error: Call to undefined function form_open()…..

Usualy this error will throw becuse of missing the including the helper file.

Please edit the autoload.php in the config folder with below lines

$autoload[‘helper’] = array(‘url’,’form’);–add ‘form’ in this array if not exists.

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