how to reset method in codeigniter - php

Question

I have a form that uploads many files and images at the same time.
the problem is this method
$this->upload->display_errors()
each time the loop goes through this method it saves error from the previous loop round
$error[$i]= "File error: ".$this->upload->display_errors();
for example, if I uploaded two illegal files it shows me this
index 0: file is not allowed
index 1: file is not allowed file is not allowed
So how can I reset this method?
ps: I tried to reset() function and it didn't work
UPDATE
This is the method
public function do_upload($product_id)
{
$error = array();
if(isset($_FILES['files']['name'])&&!empty($_FILES['files']['name'][0])):
for ($i=0; $i <count($_FILES['files']['name']) ; $i++) :
$config['upload_path'] = './images/';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = 1;
$this->load->library('upload', $config);
$_FILES['files[]']['name'] = $_FILES['files']['name'][$i];
$_FILES['files[]']['tmp_name'] = $_FILES['files']['tmp_name'][$i];
$_FILES['files[]']['size'] = $_FILES['files']['size'][$i];
if(!$this->upload->do_upload('files[]')){
$error[$i]= "File name: ". $_FILES['files']['name'][$i] ." ". $this->upload->display_errors() ."<br>";
}else{
$files = $this->upload->data();
$data = array('file_name'=>$files['file_name'],'product_id'=>$product_id,'file_type'=>$files['file_type']);
$this->Files_model->create_file($data);
}
endfor;
endif;
return $error;
//end method
}

Answer 1

We can't reset $this->upload->do_upload();
But we can reinitialize like that
// first upload
$this->config->load('upload');
-- Code to upload Here --
// Another file
$this->config->load('upload_other_files');
-- Code to upload Here --
OR You can defined multiple config array for each file Like below code :
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = '100';
$config['max_width'] = '1024';
$config['max_height'] = '768';
$this->load->library('upload', $config);
$this->upload->initialize($config);
For another files
$config2['upload_path'] = './uploads/';
$config2['allowed_types'] = 'gif|jpg|png';
$config2['max_size'] = '100';
$config2['max_width'] = '100';
$config2['max_height'] = '100';
$this->load->library('upload', $config2);
// Alternately you can set
$this->upload->initialize($config2);

Answer 2

You can reset (errors) like this:
$this->upload->error_msg = [];
...do_upload