note 116983 deleted from function.com-create-guid by cmb
| From: | cmb@php.net | Date: | Sun, 30 Jun 2019 13:35:50 +0000 |
| Subject: | note 116983 deleted from function.com-create-guid by cmb | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-211449@lists.php.net to get a copy of this message | ||
Note Submitter: mark at briley dot com
----
I made a mistake on my previous note. I used rtrim instead of just trim to take off the curly
brackets. Here is my note again - or please change the RTRIM to just TRIM in my previous note.
Thanks! :-)
Kristof_Polleunis at yahoo dot com has an excellent function for obtaining a GUID but I believe it
can be improved by checking for whether or not to remove the curly braces so the programmer who uses
it doesn't have to do this. Here is the improved function:
<?php
#
# Taken from the PHP documentation website.
#
# Kristof_Polleunis at yahoo dot com
#
# A guid function that works in all php versions:
# MEM 3/30/2015 : Modified the function to allow someone
# to specify whether or not they want the curly
# braces on the GUID.
#
function guid( $opt = true ){ // Set to true/false as your default way to do this.
if( function_exists('com_create_guid') ){
if( $opt ){ return com_create_guid(); }
else { return trim( 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 ); // "-"
$left_curly = $opt ? chr(123) : ""; // "{"
$right_curly = $opt ? chr(125) : ""; // "}"
$uuid = $left_curly
. substr( $charid, 0, 8 ) . $hyphen
. substr( $charid, 8, 4 ) . $hyphen
. substr( $charid, 12, 4 ) . $hyphen
. substr( $charid, 16, 4 ) . $hyphen
. substr( $charid, 20, 12 )
. $right_curly;
return $uuid;
}
}
?>
As the comments say - set the incoming option ($opt) to either TRUE or FALSE depending upon whether
you want the curly braces to always show up or not. If you need to obtain a GUID in the other way -
all you have to do is to send the opposite value to the function.