How to reduce size of UUID in Doctrine ORM Entity

Question

In my application i'm used UUID as primary key, its working fine but its length too large it contains 32-bit characters. how to reduce length of UUID.

Here my UUID

49b0143d-fb8f-4e98-b608-45167748cbc4 

Expected UUID

49b0143d or 49b0143d-fb8f-4e98 

Answer 1

Section 3 of RFC4122 provides the formal definition of UUID string representations. It's 36 characters - 32 hex digits + 4 dashes. So that the generated uuid's will always have these many numbers of characters. So what you can do is either take/extract the first/desired part of the uuid, by using methods like substring preg-split, etc...

Basic substring() usage (copied from php docs)

<?php
echo substr('abcdef', 1);     // bcdef
echo substr('abcdef', 1, 3);  // bcd
echo substr('abcdef', 0, 4);  // abcd
echo substr('abcdef', 0, 8);  // abcdef
echo substr('abcdef', -1, 1); // f

and make your primary key the newly generated one