https://play.golang.org/p/5gkioT6NkiU

CodeToUUID.go

package main

import (
	"fmt"
	"crypto/md5"
	"github.com/google/uuid"
)


func CodeToUUID(code string) uuid.UUID {
	return uuid.NewHash(md5.New(), uuid.Nil, []byte(code), 4)
}

func main() {
	fmt.Println(CodeToUUID("Hello, playground"))
}

CodeToUUID.php

<?php

function guidv4($data = null) {
  // Generate 16 bytes (128 bits) of random data or use the data passed into the function.
  $data = $data ?? random_bytes(16);
  assert(strlen($data) == 16);

  // Set version to 0100
  $data[6] = chr(ord($data[6]) & 0x0f | 0x40);
  // Set bits 6-7 to 10
  $data[8] = chr(ord($data[8]) & 0x3f | 0x80);

  // Output the 36 character UUID.
  return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
}

function codeToUUID($code, $namespace = null) {
  $ctx = hash_init('md5');
  if (is_null($namespace)) {
    hash_update($ctx, hex2bin('00000000000000000000000000000000'));
  } else {
    hash_update($ctx, $namespace);
  }
  hash_update($ctx, $code);

  return guidv4(hash_final($ctx, true));  
}

echo codeToUUID("Hello, playground");