#Uuid generator php generator#
#Uuid generator php archive#
#Uuid generator php full#
#Uuid generator php software#

The term GUID is generally used by developers working with Microsoft technologies, while UUID is used everywhere else. Return Values ¶ Returns the GUID as a string, or false on failure. Parameters ¶ This function has no parameters. A GUID is generated in the same way as DCE UUIDs, except that the Microsoft convention is to enclose a GUID in curly braces. It is a 128-bit integer number used to identify resources. Generates a Globally Unique Identifier (GUID).

#Uuid generator php generator#

It's definitely more secure, and the code is considerably shorter, and can easily be adapted (just change 32 to 64 if you want more security with your code, you would have to change a lot more). GUID (UUID) Generator GUID (or UUID) is an acronym for 'Globally Unique Identifier' (or 'Universally Unique Identifier').

Just use openssl_random_pseudo_bytes instead. I don't think that there is really a security issue with what you have, but it is definitely not the correct approach. If we assume that it is completely broken (which it is probably not, but I haven't looked at the code, and it does have a big warning in the documentation), that would only leave you with 10 random numerical characters (from a not-so-great rng), which doesn't seem that great. I also don't see a reason for strtoupper, it even reduces randomness.Īlso note that uniqid is not supposed to be used for any security purposes. It just makes the token longer, without adding randomness. I don't really see a reason to place hyphens in-between the characters.

#Uuid generator php software#

UUID is defined by the Open Software Foundation (OSF) and is an integral part of the Distributed Computing Environment (DCE).

#Uuid generator php full#

The full spelling of UUID is 'Universally Unique Identifier', which can be translated as 'Universally Unique Identifier'. Just use openssl_random_pseudo_bytes: base64_encode(openssl_random_pseudo_bytes(32)) Simply put, UUID is a string of globally unique (hexadecimal) numbers. Although seeding it with the time is not that good of an idea, as time is a value an attacker might guess.īut really, there is no reason to use rand in the first place (the documentation also warns against using it when secure values are needed). I think mt_srand seeds the rng for mt_rand, not for rand. This function is working perfect and on a loop of 30 runs it gives me this result:īut it seems like there is a better way of creating this, although I have tried to use com_create_guid, this did not give quite the result I wanted.

$charid = strtoupper(md5(uniqid(rand(), true))) The function that I have so far is as such: function UUID() Here's my final version of a GUIDv4 function (based on others work here) that should work on all platforms and gracefully fallback to less cryptographically secure version if others are not supported.I am trying to prevent CSRF for my login page (linked from here), and for this I am going to use a random token generator to create a UUID for the session.

#Uuid generator php archive#

Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting User Submitted Data Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts ? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search