1. /Users/ericduran/Sites/drupal/drupal
  2. core
  3. lib
  4. Drupal
  5. Component
  6. Uuid
  7. Php.php
 
Code Coverage
 
Classes and Traits
Functions and Methods
Lines
Total
100.00% covered (success)
100.00%
1 / 1
100.00% covered (success)
100.00%
1 / 1
 CRAP
100.00% covered (success)
100.00%
13 / 13
Php
100.00% covered (success)
100.00%
1 / 1
100.00% covered (success)
100.00%
1 / 1
 1
100.00% covered (success)
100.00%
13 / 13
 generate
100.00% covered (success)
100.00%
1 / 1
 1
100.00% covered (success)
100.00%
13 / 13
<?php
/**
 * @file
 * Contains \Drupal\Component\Uuid\Php.
 */
namespace Drupal\Component\Uuid;
use Drupal\Component\Utility\Crypt;
/**
 * Generates a UUID v4 using PHP code.
 *
 * Loosely based on Ruby's UUIDTools generate_random logic.
 *
 * @see http://uuidtools.rubyforge.org/api/classes/UUIDTools/UUID.html
 */
class Php implements UuidInterface {
  /**
   * {@inheritdoc}
   */
  public function generate() {
    $hex = substr(hash('sha256', Crypt::randomBytes(16)), 0, 32);
    // The field names refer to RFC 4122 section 4.1.2.
    $time_low = substr($hex, 0, 8);
    $time_mid = substr($hex, 8, 4);
    $time_hi_and_version = base_convert(substr($hex, 12, 4), 16, 10);
    $time_hi_and_version &= 0x0FFF;
    $time_hi_and_version |= (4 << 12);
    $clock_seq_hi_and_reserved = base_convert(substr($hex, 16, 4), 16, 10);
    $clock_seq_hi_and_reserved &= 0x3F;
    $clock_seq_hi_and_reserved |= 0x80;
    $clock_seq_low = substr($hex, 20, 2);
    $nodes = substr($hex, 20);
    $uuid = sprintf('%s-%s-%04x-%02x%02x-%s',
      $time_low, $time_mid,
      $time_hi_and_version, $clock_seq_hi_and_reserved,
      $clock_seq_low, $nodes);
    return $uuid;
  }
}