/**
* @brief Generate a UUID
*
* @param mixed $version The version to generate (default UUID_V4)
* @param mixed $url The URL to use for V3 and V5 UUIDs.
* @return string The UUID
*/
public function generate($version = self::UUID_V4, $url = null)
{
// Implementation for ossp-uuid
$hu = null;
$ustr = null;
switch ($version) {
case self::UUID_V1:
\uuid_create($hu);
\uuid_make($hu, \UUID_MAKE_V1 | \UUID_MAKE_MC);
break;
case self::UUID_V3:
\uuid_create($hu);
if (!$url) {
return null;
}
$ns = null;
\uuid_create($ns);
\uuid_make($hu, \UUID_MAKE_V3, $ns, $url);
\uuid_destroy($ns);
break;
case self::UUID_V4:
\uuid_create($hu);
\uuid_make($hu, \UUID_MAKE_V4);
break;
case self::UUID_V5:
\uuid_create($hu);
\uuid_create($ns);
\uuid_make($hu, \UUID_MAKE_V5, $ns, $url);
\uuid_destroy($ns);
break;
default:
return null;
}
\uuid_export($hu, UUID_FMT_STR, $ustr);
$uuid = $ustr;
return trim($uuid);
}
<?php
if (function_exists("uuid_export")) {
echo "Version: " . uuid_version() . "\n";
if (uuid_create($uuid)) {
die("Can't create\n");
}
for ($i = 0; $i < 10; $i++) {
if (!uuid_make($uuid, UUID_MAKE_V4) && !uuid_export($uuid, UUID_FMT_STR, $str)) {
echo "{$i}: {$str}\n";
}
}
uuid_destroy($uuid);
} else {
if (function_exists("uuid_create")) {
for ($i = 0; $i < 10; $i++) {
echo "{$i}: " . uuid_create() . "\n";
}
} else {
die("No UUID extension\n");
}
}
public function __destruct()
{
uuid_destroy($this->uuid);
}
/**
* Generate a 36-character RFC 4122 UUID, without the urn:uuid: prefix.
*
* @see http://www.ietf.org/rfc/rfc4122.txt
* @see http://labs.omniti.com/alexandria/trunk/OmniTI/Util/UUID.php
*/
public function generate()
{
$this->_uuid = null;
if (extension_loaded('uuid')) {
if (function_exists('uuid_export')) {
// UUID extension from http://www.ossp.org/pkg/lib/uuid/
if (uuid_create($ctx) == UUID_RC_OK && uuid_make($ctx, UUID_MAKE_V4) == UUID_RC_OK && uuid_export($ctx, UUID_FMT_STR, $str) == UUID_RC_OK) {
$this->_uuid = $str;
uuid_destroy($ctx);
}
} else {
// UUID extension from http://pecl.php.net/package/uuid
$this->_uuid = uuid_create();
}
}
if (!$this->_uuid) {
list($time_mid, $time_low) = explode(' ', microtime());
$time_low = (int) $time_low;
$time_mid = (int) substr($time_mid, 2) & 0xffff;
$time_high = mt_rand(0, 0xfff) | 0x4000;
$clock = mt_rand(0, 0x3fff) | 0x8000;
$node_low = function_exists('zend_thread_id') ? zend_thread_id() : getmypid();
$node_high = isset($_SERVER['SERVER_ADDR']) ? ip2long($_SERVER['SERVER_ADDR']) : crc32(php_uname());
$node = bin2hex(pack('nN', $node_low, $node_high));
$this->_uuid = sprintf('%08x-%04x-%04x-%04x-%s', $time_low, $time_mid, $time_high, $clock, $node);
}
}
