GUID for globally unique identifier

How to create GUID in php

1-guid stands for globally unique identifier generally used to create random unique strings in php, create access token in php

2-Mostly use of GUID for generating access token, generate unique id, generating unique string in php. Using this article how to create guide in php you can create a random string for any use to keep unique

3-GUID consists of alphanumeric characters only and is grouped in five groups separated by hyphens as seen in this example:

3F2504E0-4F89-11D3-9A0C-0305E82C3301

Eg:-

<?php

/**

* Generate Globally Unique Identifier (GUID)

* E.g. 2EF40F5A-ADE8-5AE3-2491-85CA5CBD6EA7

*

* @param boolean $include_braces Set to true if the final guid needs

*                                to be wrapped in curly braces

* @return string

*/

function generateGuid($include_braces = false) {

if (function_exists('com_create_guid')) {

if ($include_braces === true) {

return com_create_guid();

} else {

return substr(com_create_guid(), 1, 36);

}

} else {

mt_srand((double) microtime() * 10000);

$charid = strtoupper(md5(uniqid(rand(), true)));

$guid = substr($charid,  0, 8) . '-' .

substr($charid,  8, 4) . '-' .

substr($charid, 12, 4) . '-' .

substr($charid, 16, 4) . '-' .

substr($charid, 20, 12);

if ($include_braces) {

$guid = '{' . $guid . '}';

}

return $guid;

}

}

------------------------------------------------------------------------
Output:
$GUID = getGUID();
echo $GUID;