Codeigniter CI_Form_validation undefined function - php

Question

So I am getting the following error.
Fatal error: Call to undefined method CI_Form_validation::error_array() in /home/kmgpdev/public_html/projects/lm/application/controllers/api.php on line 64
Line 63 through 66 reads
if($this->form_validation->run() == false) {
$this->output->set_output(json_encode(['result' => 0, 'error' => $this->form_validation->error_array()]));
return false;
}
If I remove the 64th line it works fine, just no errors are produced.
Also here is my MY_Form_validation.php file I created as a custom library.
class MY_Form_validation extends CI_Form_validation
{
public function __construct($config = array())
{
parent::__construct($config);
}
public function error_array()
{
if(count($this->_error_array > 0)) {
return $this->_error_array;
}
}
}
So it running well in localhost, xampp and when I upload to my ubuntu server then it happend this error, I cannot figure out why this error is coming up. I'm using php 5.5, Any suggestions?
Thanks in advance.

Answer 1

To get the first error message, I have put a utility function like this directly under //system/libraries/Form_validation.php. Otherwise you can use $this->form_validation->error_string() instead of directly picking error array. In most cases, you would want your user to see the error as a string :
function first_error_string($prefix = '', $suffix = '')
{
// No errrors, validation passes!
if (count($this->_error_array) === 0)
{
return '';
}
if ($prefix == '')
{
$prefix = $this->_error_prefix;
}
if ($suffix == '')
{
$suffix = $this->_error_suffix;
}
// Generate the error string
$str = '';
foreach ($this->_error_array as $val)
{
if ($val != '')
{
$str .= $prefix.$val.$suffix;
break;
}
}
return $str;
}