生成v4 UUID的PHP函数因此,我已经做了一些调查,我一直试图拼凑一个函数,以生成一个有效的v4UUID在PHP。这是我能来的最近的一次。我在十六进制、十进制、二进制、PHP的位运算符等方面的知识几乎是不存在的。此函数生成一个有效的v4UUID,直到一个区域。V4 UUID应以下形式出现:xxxxxxx-xxxx-4XXX-yxxx-xxxxxxxxxx哪里y是8,9,A或B。这是函数失败的地方,因为它不遵守它。我希望在这方面比我有更多知识的人能帮我忙,帮我解决这个问题,这样它就能遵守这个规则。职能如下:<?phpfunction gen_uuid() {
$uuid = array(
'time_low' => 0,
'time_mid' => 0,
'time_hi' => 0,
'clock_seq_hi' => 0,
'clock_seq_low' => 0,
'node' => array()
);
$uuid['time_low'] = mt_rand(0, 0xffff) + (mt_rand(0, 0xffff) << 16);
$uuid['time_mid'] = mt_rand(0, 0xffff);
$uuid['time_hi'] = (4 << 12) | (mt_rand(0, 0x1000));
$uuid['clock_seq_hi'] = (1 << 7) | (mt_rand(0, 128));
$uuid['clock_seq_low'] = mt_rand(0, 255);
for ($i = 0; $i < 6; $i++) {
$uuid['node'][$i] = mt_rand(0, 255);
}
$uuid = sprintf('%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x',
$uuid['time_low'],
$uuid['time_mid'],
$uuid['time_hi'],
$uuid['clock_seq_hi'],
$uuid['clock_seq_low'],
$uuid['node'][0],
$uuid['node'][1],
$uuid['node'][2],
$uuid['node'][3],
$uuid['node'][4],
$uuid['node'][5]
);
return $uuid;}?>感谢任何能帮我的人。
3 回答
BIG阳
TA贡献1859条经验 获得超6个赞
function gen_uuid() { return sprintf( '%04x%04x-%04x-%04x-%04x-%04x%04x%04x', // 32 bits for "time_low" mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ), // 16 bits for "time_mid" mt_rand( 0, 0xffff ), // 16 bits for "time_hi_and_version", // four most significant bits holds version number 4 mt_rand( 0, 0x0fff ) | 0x4000, // 16 bits, 8 bits for "clk_seq_hi_res", // 8 bits for "clk_seq_low", // two most significant bits holds zero and one for variant DCE1.1 mt_rand( 0, 0x3fff ) | 0x8000, // 48 bits for "node" mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ) );}
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