uuid algorithm

/** * Generates an UUID * * @author Anis uddin Ahmad * @param string a optional prefix * @return string The formatted UUID /function uuid ($prefix = ') { $chars = MD5 ( Uniqid (Mt_rand (), true); $uuid = substr

  /** * Generates an UUID * * @author Anis uddin Ahmad * @param string an optional prefix * @return string the formatted uuid */ function uuid($prefix = '') { $chars = md5(uniqid(mt_rand(), true)); $uuid =

The GUID is a 128-bit long number, typically represented by a 16 binary. The core idea of the algorithm is to combine the machine's NIC, local time, and a random number to generate the GUID. Theoretically, if a machine produces 10 million GUIDs per

By definition, the UUID (Universally unique IDentifier, also known as the GUID) is unique in both time and space. To ensure the uniqueness of the space, each UUID uses a 48-bit value to record, typically the computer's network card address. To

The globally unique identifier (guid,globally unique Identifier) is also known as the UUID (universally unique Identifier).A GUID is a numeric identifier generated by the algorithm with a binary length of 128 bits. The format of the GUID is

The UUID meaning is a universal unique identifier (universally unique Identifier), which is a software construction standard and is also used by the Open Software Foundation, OSF, to organize applications in a distributed computing environment (

Reference JDKUUIDextends objectimplements Serializable, comparableA class that represents a universally unique identifier (UUID). The UUID represents a 128-bit value.These generic identifiers have different variants. This class of methods is used to

I looked for a long time on the internet, some people say UUID is better, is in the sub-database table, merge data what is easier, also some people say self-increase, to the table of data more time, performance than the UUID is much better, in the

Python uses the UUID library to generate a unique ID. UUID Introduction UUID is a 128-bit globally unique identifier, usually represented by a 32-byte string. It can ensure the uniqueness of time and space, also known as GUID. It is called UUID --

The only database that I am still familiar with is mysql. Probably mysql users, more than 9% will use autoincrement ID as the primary key. This is understandable, because the auto-increment ID of MySQL is very efficient and convenient to use. So