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+--- Thread: Is File Upload class creates unique file name when encrypt_name set true? (/showthread.php?tid=72048)
Is File Upload class creates unique file name when encrypt_name set true? - karthik_code - 10-29-2018
Is File Uploading class in code ignter creates unique file name when encrypt_name set true?
PHP Code:
$config['upload_path'] = $abs_path;
$config['allowed_types'] = 'doc|docx|pdf';
$config['max_size'] = '5120';
$config['remove_spaces'] = TRUE;
$config['encrypt_name'] = TRUE;
$this->load->library('upload', $config);
RE: Is File Upload class creates unique file name when encrypt_name set true? - InsiteFX - 10-30-2018
It's in the User's Guide.
encrypt_name
If set to TRUE the file name will be converted to a random encrypted string.
This can be useful if you would like the file saved with a name that can not be discerned by the person uploading it.
RE: Is File Upload class creates unique file name when encrypt_name set true? - karthik_code - 10-30-2018
(10-30-2018, 03:07 AM)InsiteFX Wrote: It's in the User's Guide.Thanks for the quick reply.
encrypt_name
If set to TRUE the file name will be converted to a random encrypted string.
This can be useful if you would like the file saved with a name that can not be discerned by the person uploading it.
I already read the guide. My question is, whether it will be a unique name. Because, I am storing all user uploads in a single folder, hence it should not be overwritten at any time.
Also, I could not able to find a way to prefix a unique id to the random filename.
If I manually set a unique file name, unable to determine the original file's extension.
RE: Is File Upload class creates unique file name when encrypt_name set true? - dave friend - 10-30-2018
encrypt_name does not guarantee a unique file name. That said, the chance of a name collision is incredibly small. But a small chance is not the same as no chance.
You might be interested to know that do_upload() calls set_filename() and set_filename() will append a number to the end of the filename to avoid overwriting a pre-existing file. This happens for any file upload encrypted name or not.
RE: Is File Upload class creates unique file name when encrypt_name set true? - jreklund - 10-30-2018
Personally I'm using a UUID version 4 generator for my file names and all ID (instead of auto increment).
PHP Code:
if ( ! function_exists('UUIDv4'))
{
/**
* Generates a random UUID using the secure RNG.
*
* Returns Version 4 UUID format: xxxxxxxx-xxxx-4xxx-Yxxx-xxxxxxxxxxxx where x is
* any random hex digit and Y is a random choice from 8, 9, a, or b.
*
* @return string the UUID
*/
function UUIDv4()
{
$bytes = random_bytes(16);
$bytes[6] = chr((ord($bytes[6]) & 0x0f) | 0x40);
$bytes[8] = chr((ord($bytes[8]) & 0x3f) | 0x80);
$uuid = vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($bytes), 4));
return $uuid;
}
}
https://en.wikipedia.org/wiki/Universally_unique_identifier#Collisions
RE: Is File Upload class creates unique file name when encrypt_name set true? - karthik_code - 10-31-2018
(10-30-2018, 09:41 AM)dave friend Wrote: You might be interested to know that do_upload() calls set_filename() and set_filename() will append a number to the end of the filename to avoid overwriting a pre-existing file. This happens for any file upload encrypted name or not.This is the function i want.
RE: Is File Upload class creates unique file name when encrypt_name set true? - karthik_code - 10-31-2018
Thanks @jreklund & @Dave friend, I finally ended with prefixing auto-increament id along with uuid to the uploaded file name. I worried about setting the original file's extension with filename, but CodeIgniter automatically preserves the original file's extension even I didn't mention it in $config['file_name'] parameter.
RE: Is File Upload class creates unique file name when encrypt_name set true? - Gurutechnolabs - 11-02-2018
You need a .htaccess file on your root folder
like below code
RewriteEngine On
RewriteCond %{REQUEST_URI} ^/system.*
RewriteRule ^(.*)$ index.php?/$1 [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.+)$ index.php?/$1 [L]