<?php

$string = 'a:10:{s:4:"name";a:2:{s:4:"type";s:8:"excluded";s:5:"value";s:0:"";}s:8:"keywords";a:2:{s:4:"type";s:8:"excluded";s:5:"value";s:0:"";}s:11:"description";a:2:{s:4:"type";s:8:"excluded";s:5:"value";s:0:"";}s:3:"sku";a:2:{s:4:"type";s:8:"excluded";s:5:"value";s:0:"";}s:12:"manufacturer";a:2:{s:4:"type";s:8:"excluded";s:5:"value";s:0:"";}s:11:"programname";a:2:{s:4:"type";s:8:"excluded";s:5:"value";s:0:"";}s:12:"dataprovider";a:2:{s:4:"type";s:8:"excluded";s:5:"value";s:0:"";}s:11:"lastupdated";a:1:{s:5:"value";N;}s:8:"currency";a:1:{s:5:"value";s:0:"";}s:5:"price";a:1:{s:5:"value";s:3:"100";}}';
var_dump(unserialize($string));

array(10) {
  ["name"]=>
  array(2) {
    ["type"]=>
    string(8) "excluded"
    ["value"]=>
    string(0) ""
  }
  ["keywords"]=>
  array(2) {
    ["type"]=>
    string(8) "excluded"
    ["value"]=>
    string(0) ""
  }
  ["description"]=>
  array(2) {
    ["type"]=>
    string(8) "excluded"
    ["value"]=>
    string(0) ""
  }
  ["sku"]=>
  array(2) {
    ["type"]=>
    string(8) "excluded"
    ["value"]=>
    string(0) ""
  }
  ["manufacturer"]=>
  array(2) {
    ["type"]=>
    string(8) "excluded"
    ["value"]=>
    string(0) ""
  }
  ["programname"]=>
  array(2) {
    ["type"]=>
    string(8) "excluded"
    ["value"]=>
    string(0) ""
  }
  ["dataprovider"]=>
  array(2) {
    ["type"]=>
    string(8) "excluded"
    ["value"]=>
    string(0) ""
  }
  ["lastupdated"]=>
  array(1) {
    ["value"]=>
    NULL
  }
  ["currency"]=>
  array(1) {
    ["value"]=>
    string(0) ""
  }
  ["price"]=>
  array(1) {
    ["value"]=>
    string(3) "100"
  }
}