/**
* Generates a string of binary data of the specified length
*
* @param integer $length The number of bytes of random binary data to generate
* @return string A binary string
*/
public function generate($length)
{
if ($length < self::TIMESTAMP_BYTES || $length < 0) {
throw new \InvalidArgumentException('Length must be a positive integer.');
}
$hash = '';
if (self::TIMESTAMP_BYTES > 0 && $length > self::TIMESTAMP_BYTES) {
$hash = $this->randomGenerator->generate($length - self::TIMESTAMP_BYTES);
}
$lsbTime = str_pad($this->converter->toHex($this->timestamp()), self::TIMESTAMP_BYTES * 2, '0', STR_PAD_LEFT);
return hex2bin(str_pad(bin2hex($hash), $length - self::TIMESTAMP_BYTES, '0') . $lsbTime);
}
/**
* Generates a string of binary data of the specified length
*
* @param integer $length The number of bytes of random binary data to generate
* @return string A binary string
*/
public function generate($length)
{
if ($length < $this->timestampBytes || $length < 0) {
throw new \InvalidArgumentException('Length must be a positive integer.');
}
$hash = '';
if ($this->timestampBytes > 0 && $length > $this->timestampBytes) {
$hash = $this->randomGenerator->generate($length - $this->timestampBytes);
}
$lsbTime = str_pad($this->converter->toHex($this->timestamp()), $this->timestampBytes * 2, '0', STR_PAD_LEFT);
if ($this->timestampBytes > 0 && strlen($lsbTime) > $this->timestampBytes * 2) {
$lsbTime = substr($lsbTime, 0 - $this->timestampBytes * 2);
}
return hex2bin(str_pad(bin2hex($hash), $length - $this->timestampBytes, '0')) . hex2bin($lsbTime);
}
public function uuid4()
{
$bytes = $this->randomGenerator->generate(16);
// When converting the bytes to hex, it turns into a 32-character
// hexadecimal string that looks a lot like an MD5 hash, so at this
// point, we can just pass it to uuidFromHashedName.
$hex = bin2hex($bytes);
return $this->uuidFromHashedName($hex, 4);
}