PHP function to generate v4 UUID

0 votes

I am working on a function that generates a valid v4 UUID in PHP. This function generates a valid v4 UUID up until one area. A v4 UUID should be in the form of:

xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx

Where y is 8, 9, A, or B. This is where the functions fail as it doesn't adhere to that.

The function is as follows:

<?php

function gen_uuid() {
 $uuid = array(
  'time_low'  => 0,
  'time_mid'  => 0,
  'time_hi'  => 0,
  'clock_seq_hi' => 0,
  'clock_seq_low' => 0,
  'node'   => array()
 );
 
 $uuid['time_low'] = mt_rand(0, 0xffff) + (mt_rand(0, 0xffff) << 16);
 $uuid['time_mid'] = mt_rand(0, 0xffff);
 $uuid['time_hi'] = (4 << 12) | (mt_rand(0, 0x1000));
 $uuid['clock_seq_hi'] = (1 << 7) | (mt_rand(0, 128));
 $uuid['clock_seq_low'] = mt_rand(0, 255);
 
 for ($i = 0; $i < 6; $i++) {
  $uuid['node'][$i] = mt_rand(0, 255);
 }
 
 $uuid = sprintf('%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x',
  $uuid['time_low'],
  $uuid['time_mid'],
  $uuid['time_hi'],
  $uuid['clock_seq_hi'],
  $uuid['clock_seq_low'],
  $uuid['node'][0],
  $uuid['node'][1],
  $uuid['node'][2],
  $uuid['node'][3],
  $uuid['node'][4],
  $uuid['node'][5]
 );
 
 return $uuid;
}

?>

Can someone help me complete this function?

Jun 4 in PHP by Kichu
• 19,040 points
16 views

No answer to this question. Be the first to respond.

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.

Related Questions In PHP

0 votes
1 answer

Why does the PHP json_encode function convert UTF-8 strings to hexadecimal entities?

Hii @kartik, Working with different servers with various ...READ MORE

answered Apr 20, 2020 in PHP by Niroj
• 82,720 points
2,406 views
0 votes
1 answer

How to Execute PHP function with onclick?

Hello @kartik, In javascript, make an ajax function, function ...READ MORE

answered Jun 16, 2020 in PHP by Niroj
• 82,720 points
16,922 views
0 votes
1 answer

How to call a php function from ajax?

Hello @kartik, You can't call a PHP function ...READ MORE

answered Jun 16, 2020 in PHP by Niroj
• 82,720 points
9,255 views
0 votes
1 answer

How to call function of one php file from another php file and pass parameters to it?

Hello @kartik, Include the first file into the ...READ MORE

answered Aug 27, 2020 in PHP by Niroj
• 82,720 points
12,539 views
0 votes
1 answer

How can I use jquery $.ajax to call a PHP function?

Hello @kartik, Use $.ajax to call a server context (or ...READ MORE

answered Aug 27, 2020 in PHP by Niroj
• 82,720 points
4,859 views
0 votes
1 answer

How to generate .json file with PHP?

Hello @kartik, Here is a sample code: <?php $sql="select ...READ MORE

answered Sep 15, 2020 in PHP by Niroj
• 82,720 points
1,398 views
0 votes
1 answer
0 votes
1 answer

Wordpress Critical Error Due to Plugin Conflict with my Functions.php

// WooCommerce Stock message add_filter( 'woocommerce_get_availability', 'mw_get_availability', ...READ MORE

answered Feb 26 in Others by narikkadan
• 10,840 points
172 views
0 votes
0 answers

How to base64 encode php in this format?

Can someone please guide me on how ...READ MORE

Jun 10 in PHP by narikkadan
• 10,840 points
24 views
0 votes
0 answers

Can I use PHP reserved names for my functions and classes?

I wanted to create a function called ...READ MORE

Jun 12 in PHP by narikkadan
• 10,840 points
5 views
webinar REGISTER FOR FREE WEBINAR X
Send OTP
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP