Form Validation

You can define form validation roles in either model or controller. To set the validation roles, you can declare an array, and then define each validation error text as a key of the array like below-

$errors = array(); 
 
if($_POST[‘name’]){ 
 $errors['name'] = "Name can not be empty!"; 
}  
 
if($_POST[price]){ 
 $errors['price'] = "Price can not be empty!"; 
} 

Once you’ve defined each validation roles, you have to pass the array to ​setErrors() method as parameter to get the errors in the view page.

To show the error in the view page, use the ​field_err()​ method like below-

<span><?php echo field_err('name'); ?></span> 

Get Previously Submitted Values

To get the submitted post values back in the view page they were submitted from, use the ​field_val()​ method.

<input type="text" name="name" value="<?php echo field_val('name'); ?>"