Dynamically Codeigniter Image Upload Rename - php

Question

I am uploading multiple dynamic images with codeigniter with the following code.
foreach ($_FILES as $key => $value) {
$imagePrefix = time();
if (!$this->upload->do_upload($key))
{
echo $errors = $this->upload->display_errors();
return '';
}
else
{
$imagename = $imagePrefix.$value['name'];
$insertImage = $this->db->query("Insert into `tbl_event_imges` (`iEventID`,`vImage`) values ('".$insertId."','".$imagename."')");
}
}
When I upload an image to the specific folder this works fine; the issue is if a user uploads an image having same name, then it will automatically rename the image and upload to the folder, but what I want is to rename it by adding $imagePrefix that I have added in else part of the code and then want to upload the image with this name. But this is not working with me..
Any suggestion please?

Answer 1

you need to provide configuration preferences to your upload function like so:
$imagePrefix = time();
$imagename = $imagePrefix.$value['name'];
$this->load->library('upload');
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png';
$config['file_name'] = $imagename; // set the name here
$this->upload->initialize($config);
if (!$this->upload->do_upload($key)){
...
}else{
...
}
Source: http://www.codeigniter.com/user_guide/libraries/file_uploading.html?highlight=file%20upload#setting-preferences

Answer 2

Just alternative, you can use CI's rename function to rename after file uploaded.
$image = $this->upload->data();
$file_path = $image ['file_path'];
$file = $image ['full_path'];
$file_ext = $image['file_ext'];
$final_file_name = time() . $image['file_name'] . $file_ext;

Answer 3

only add below code and it run successfully and also set encrypt_name to false
$path = $_FILES['userfile']['name'];
$newName = "Add any name".".".pathinfo($path, PATHINFO_EXTENSION);
$config['file_name'] = $newName;
$config['encrypt_name'] = false;