<?php
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/**
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*文件名：UserInfo.php
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*编写人：杨林康
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*时间 ：2014-04-23
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*功能 ：生成Guid
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*备注 ：使用时GUID::create()生成guid
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*/
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namespace App\Utils;
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class guid
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{
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public static function create()
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{
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$microTime = microtime();
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list($a_dec, $a_sec) = explode(" ", $microTime);
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$dec_hex = dechex($a_dec* 1000000);
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$sec_hex = dechex($a_sec);
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guid::ensureLength($dec_hex, 5);
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guid::ensureLength($sec_hex, 6);
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$guid = "";
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$guid .= $dec_hex;
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$guid .= guid::createGuidSection(3);
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$guid .= '-';
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$guid .= guid::createGuidSection(4);
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$guid .= '-';
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$guid .= guid::createGuidSection(4);
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$guid .= '-';
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$guid .= guid::createGuidSection(4);
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$guid .= '-';
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$guid .= $sec_hex;
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$guid .= guid::createGuidSection(6);
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$ret = str_replace("-","",$guid);
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return $ret;
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}
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public static function getGuid(){
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$microTime = microtime();
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list($a_dec, $a_sec) = explode(" ", $microTime);
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$dec_hex = dechex($a_dec* 1000000);
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$sec_hex = dechex($a_sec);
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guid::ensureLength($dec_hex, 5);
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guid::ensureLength($sec_hex, 6);
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$guid = "";
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$guid .= $dec_hex;
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$guid .= guid::createGuidSection(3);
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$guid .= guid::createGuidSection(4);
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$guid .= guid::createGuidSection(4);
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$guid .= guid::createGuidSection(4);
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$guid .= $sec_hex;
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$guid .= guid::createGuidSection(6);
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return $guid;
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}
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public static function ensureLength(&$string, $length)
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{
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$strlen = strlen($string);
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if($strlen < $length)
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{
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$string = str_pad($string,$length,"0");
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}
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else if($strlen > $length)
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{
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$string = substr($string, 0, $length);
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}
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}
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public static function createGuidSection($characters)
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{
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$return = "";
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for($i=0; $i<$characters; $i++)
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{
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$return .= dechex(mt_rand(0,15));
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}
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return $return;
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}
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}
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