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"Refactoring String::uuid();

Browse source 
Adding fix when current PHP process ID is greater than 5 digits.
If PHP process ID returns false or can not be determined a random 5 digit number will be generated.
Added support for IPv6.
String::uuid(); will default to crc32 of Security.salt if $node (IP) is 127.0.0.1, $node (IPv6) < 38 characters, or $node can not be determined."

git-svn-id: https://svn.cakephp.org/repo/branches/1.2.x.x@6175 3807eeeb-6ff5-0310-8944-8be069107fe0
This commit is contained in:
phpnut 2007-12-19 09:23:26 +00:00
parent 079c2d25f1
commit 1a3f319a23
1 changed files with 34 additions and 6 deletions
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40
cake/libs/string.php
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@ -85,26 +85,49 @@ class String extends Object {
*/
function uuid() {
$node = env('SERVER_ADDR');
$pid = null;
if(empty($node)) {
if (strpos($node, ':') !== false) {
if (substr_count($node, '::')) {
$node = str_replace('::', str_repeat(':0000', 8 - substr_count($node, ':')) . ':', $node);
}
$node = explode(':', $node) ;
$ipv6 = '' ;
foreach ($node as $id) {
$ipv6 .= str_pad(base_convert($id, 16, 2), 16, 0, STR_PAD_LEFT);
}
$node = base_convert($ipv6, 2, 10);
if (strlen($node) < 38) {
$node = null;
} else {
$node = crc32($node);
}
} elseif (empty($node)) {
$host = env('HOSTNAME');
if (empty($host)) {
$host = env('HOST');
}
if (empty($host)) {
$node = ip2long('127.0.0.1');
} else {
if (!empty($host)) {
$ip = gethostbyname($host);
if ($ip === $host) {
$node = crc32($host);
} else {
$node = ip2long($ip);
}
}
} else {
} elseif ($node !== '127.0.0.1') {
$node = ip2long($node);
} else {
$node = null;
}
if (empty($node)) {
$node = crc32(Configure::read('Security.salt'));
}
if (function_exists('zend_thread_id')) {
@ -113,9 +136,14 @@ class String extends Object {
$pid = getmypid();
}
if (!$pid) {
$pid = mt_rand(0, 0xfff) | 0x4000;
}
list($timeMid, $timeLow) = explode(' ', microtime());
$uuid = sprintf("%08x-%04x-%04x-%02x%02x-%04x%08x", (int)$timeLow, (int)substr($timeMid, 2) & 0xffff,
mt_rand(0, 0xfff) | 0x4000, mt_rand(0, 0x3f) | 0x80, mt_rand(0, 0xff), $pid, $node);
mt_rand(0, 0xfff) | 0x4000, mt_rand(0, 0x3f) | 0x80, mt_rand(0, 0xff), substr($pid, 0, 5), $node);
return $uuid;
}
/**