Random Alpha numeric generator
- by AAA
Hi,
I want to give our users in the database a unique alpha-numeric id. I am using the code below, will this always generate a unique id? Below is the old and updated version of the code:
New php:
// Generate Guid
function NewGuid() {
$s = strtoupper(md5(uniqid("something",true)));
$guidText =
substr($s,0,8) . '-' .
substr($s,8,4) . '-' .
substr($s,12,4). '-' .
substr($s,16,4). '-' .
substr($s,20);
return $guidText;
}
// End Generate Guid
$Guid = NewGuid();
echo $Guid;
echo "<br><br><br>";
Old PHP:
// Generate Guid
function NewGuid() {
$s = strtoupper(md5(uniqid("something",true)));
$guidText =
substr($s,0,8) . '-' .
substr($s,8,4) . '-' .
substr($s,12,4). '-' .
substr($s,16,4). '-' .
substr($s,20);
return $guidText;
}
// End Generate Guid
$Guid = NewGuid();
echo $Guid;
echo "<br><br><br>";
Will this first code guarantee uniqueness?
