array(2) {
  [0]=>
  string(10) "product_id"
  [1]=>
  string(5) "21951"
}
int(111)
array(1) {
  [0]=>
  string(16) "product_id=21951"
}
array(1) {
  [0]=>
  string(16) "product_id=21951"
}