PHP 5.4.36 Released

com_create_guid

(PHP 5)

com_create_guidGenerar un identificador único globalmente (GUID)

Descripción

string com_create_guid ( void )

Genera un identificador único globalmente (GUID: Globally Unique Identifier).

Un GUID es generado de la misma manera que el DCE UUID, excepto que la convención de Microsoft encierra un GUID entre llaves.

Valores devueltos

Devuelve el GUID como cadena.

Ver también

  • uuid_create() en la extensión uuid de PECL

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User Contributed Notes 2 notes

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4
Alix Axel
4 years ago
The phunction PHP framework (http://sourceforge.net/projects/phunction/) uses the following function to generate valid version 4 UUIDs:

<?php

function GUID()
{
    if (
function_exists('com_create_guid') === true)
    {
        return
trim(com_create_guid(), '{}');
    }

    return
sprintf('%04X%04X-%04X-%04X-%04X-%04X%04X%04X', mt_rand(0, 65535), mt_rand(0, 65535), mt_rand(0, 65535), mt_rand(16384, 20479), mt_rand(32768, 49151), mt_rand(0, 65535), mt_rand(0, 65535), mt_rand(0, 65535));
}

?>

The output generated by the sprintf() and mt_rand() calls is identical to com_create_guid() results.
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1
Kristof_Polleunis at yahoo dot com
9 years ago
A guid function that works in all php versions:

<?php
function guid(){
    if (
function_exists('com_create_guid')){
        return
com_create_guid();
    }else{
       
mt_srand((double)microtime()*10000);//optional for php 4.2.0 and up.
       
$charid = strtoupper(md5(uniqid(rand(), true)));
       
$hyphen = chr(45);// "-"
       
$uuid = chr(123)// "{"
               
.substr($charid, 0, 8).$hyphen
               
.substr($charid, 8, 4).$hyphen
               
.substr($charid,12, 4).$hyphen
               
.substr($charid,16, 4).$hyphen
               
.substr($charid,20,12)
                .
chr(125);// "}"
       
return $uuid;
    }
}
echo
guid();
?>
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