Stop form validating on first error codeigniter - php

Question

I'm using CI 3.1.7 and want to stop validating form if there is an error. For example:
$config = array(
array(
'field' => 'username',
'label' => 'Username',
'rules' => 'required',
'errors' => array(
'required' => '%s is required',
),
),
array(
'field' => 'password',
'label' => 'Password',
'rules' => 'required',
'errors' => array(
'required' => '%s is required',
),
),
array(
'field' => 'email',
'label' => 'Email',
'rules' => 'required',
'errors' => array(
'required' => '%s is required',
),
)
);
When user leaves username and email blank, the form will show only username is required. Any help is appreciated, thank you!

Answer 1

You cannot stop validation->run() but you can control which error message displays. The limitation is you cannot show the error next to the related field. Or, I should say instead, I cannot think of an easy way to show the error next to the input it belongs to.
Anyway, here's how to extract the first error message.
if($this->form_validation->run() == FALSE)
{
$errors = $this->form_validation->error_array();
// There could be many but grab only the first
$fields = array_keys($errors);
$err_msg = $errors[$fields[0]];
}
If you want the name of the field you can use this.
$err_field = $fields[0];

Answer 2

If i got your question right .. you want to stop on the first encountered form validation error then you have to edit the core form validation library which is extremely bad practice but luckily you can extend its functionality and either edit the run() method itself or create your own method and just copy the run() code and edit this block of code:
// Execute validation rules
foreach ($this->_field_data as $field => &$row)
{
// Don't try to validate if we have no rules set
if (empty($row['rules']))
{
continue;
}
$this->_execute($row, $row['rules'], $row['postdata']);
// here is the modification
if(count($this->_error_array) > 0) return true; // error found
}
now it will stop execution when finding its first error

Answer 3

Pleas check
public function __construct()
{
parent::__construct();
// load form and url helpers
$this->load->helper(array('form', 'url'));
// load form_validation library
$this->load->library('form_validation');
}
Or check https://code.tutsplus.com/tutorials/codeigniter-form-validation-from-start-to-finish--cms-28768