opcache-manager / includes / system / class-uuid.php

class-uuid.php in OPcache Manager 3.3.0, at includes/system/class-uuid.php

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1	<?php
2	/**
3	* UUIDs handling
4	*
5	* Handles all UUID operations and generation.
6	*
7	* @package System
8	* @author Pierre Lannoy <https://pierre.lannoy.fr/>.
9	* @since 1.0.0
10	*/
11
12	namespace OPcacheManager\System;
13
14	/**
15	* Define the UUID functionality.
16	*
17	* Handles all UUID operations and generation.
18	*
19	* @package System
20	* @author Pierre Lannoy <https://pierre.lannoy.fr/>.
21	* @since 1.0.0
22	*/
23	class UUID {
24
25	/**
26	* Initializes the class and set its properties.
27	*
28	* @since 1.0.0
29	*/
30	public function __construct() {
31	}
32
33	/**
34	* Generates a v4 UUID.
35	*
36	* @since 1.0.0
37	* @return string A v4 UUID.
38	*/
39	public static function generate_v4() {
40	return sprintf(
41	'%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
42	// phpcs:disable
43	mt_rand( 0, 0xffff ),
44	mt_rand( 0, 0xffff ),
45	mt_rand( 0, 0xffff ),
46	mt_rand( 0, 0x0fff ) \| 0x4000,
47	mt_rand( 0, 0x3fff ) \| 0x8000,
48	mt_rand( 0, 0xffff ),
49	mt_rand( 0, 0xffff ),
50	mt_rand( 0, 0xffff )
51	// phpcs:enabled
52	);
53	}
54
55	/**
56	* Generates a (pseudo) unique ID.
57	* This function does not generate cryptographically secure values, and should not be used for cryptographic purposes.
58	*
59	* @param integer $length The length of the ID.
60	* @return string The unique ID.
61	* @since 1.0.0
62	*/
63	public static function generate_unique_id( $length = 10 ) {
64	$result = '';
65	$date = new \DateTime();
66	do {
67	$s = self::generate_v4();
68	$s = str_replace( '-', (string) ( $date->format( 'u' ) ), $s );
69	$result .= $s;
70	$l = strlen( $result );
71	} while ( $l < $length );
72	return substr( str_shuffle( $result ), 0, $length );
73	}
74
75	}
76