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43 lines
857 B
PHP
43 lines
857 B
PHP
<?php
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namespace vlw\Scaffold\Helpers;
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/**
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* Generate Universally unique identifiers
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*/
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class UUID {
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public const LENGTH = 36;
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/**
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* Generate an all binary 0:s UUID
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*
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* @return string
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*/
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public static function nil(): string {
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return "00000000-0000-0000-0000-000000000000";
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}
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/**
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* Generate an all binary 1:s UUID
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*
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* @return string
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*/
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public static function max(): string {
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return "FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF";
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}
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/**
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* Generate a version 4 UUID
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*
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* @return string
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*/
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public static function v4(): string {
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return sprintf("%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
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mt_rand(0, 0xffff), mt_rand(0, 0xffff),
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mt_rand(0, 0xffff),
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mt_rand(0, 0x0fff) | 0x4000,
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mt_rand(0, 0x3fff) | 0x8000,
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mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff)
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);
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}
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}
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