Current File : /var/www/html/itworks/wp-content/plugins/sitepress-multilingual-cms/classes/utilities/wpml-uuid.php
<?php
class WPML_UUID {
/**
* @param string $object_id
* @param string $object_type
* @param int $timestamp
*
* @return string
*/
public function get( $object_id, $object_type, $timestamp = null ) {
$timestamp = $timestamp ? $timestamp : time();
$name = $object_id . ':' . $object_type . ':' . $timestamp;
return $this->get_uuid_v5( $name, wpml_get_site_id() );
}
/**
* RFC 4122 compliant UUIDs.
*
* The RFC 4122 specification defines a Uniform Resource Name namespace for
* UUIDs (Universally Unique Identifier), also known as GUIDs (Globally
* Unique Identifier). A UUID is 128 bits long, and requires no central
* registration process.
*
* @package UUID
* @license https://www.gnu.org/licenses/gpl-2.0.txt GPLv2
* @author bjornjohansen
* @see https://bjornjohansen.no/uuid-as-wordpress-guid
*
* RFC 4122 compliant UUID version 5.
*
* @param string $name The name to generate the UUID from.
* @param string $ns_uuid Namespace UUID. Default is for the NS when name string is a URL.
*
* @return string The UUID string.
*/
public function get_uuid_v5( $name, $ns_uuid = '6ba7b811-9dad-11d1-80b4-00c04fd430c8' ) {
// Compute the hash of the name space ID concatenated with the name.
$hash = sha1( $ns_uuid . $name );
// Intialize the octets with the 16 first octets of the hash, and adjust specific bits later.
$octets = str_split( substr( $hash, 0, 16 ), 1 );
/*
* Set version to 0101 (UUID version 5).
*
* Set the four most significant bits (bits 12 through 15) of the
* time_hi_and_version field to the appropriate 4-bit version number
* from Section 4.1.3.
*
* That is 0101 for version 5.
* time_hi_and_version is octets 6–7
*/
$octets[6] = chr( ord( $octets[6] ) & 0x0f | 0x50 );
/*
* Set the UUID variant to the one defined by RFC 4122, according to RFC 4122 section 4.1.1.
*
* Set the two most significant bits (bits 6 and 7) of the
* clock_seq_hi_and_reserved to zero and one, respectively.
*
* clock_seq_hi_and_reserved is octet 8
*/
$octets[8] = chr( ord( $octets[8] ) & 0x3f | 0x80 );
// Hex encode the octets for string representation.
$octets = array_map( 'bin2hex', $octets );
// Return the octets in the format specified by the ABNF in RFC 4122 section 3.
return vsprintf( '%s%s-%s-%s-%s-%s%s%s', str_split( implode( '', $octets ), 4 ) );
}
}
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