Welcome Dear!array(4) {
  ["user_id"]=>
  int(1)
  ["user_token"]=>
  string(6) "fsfsfs"
  ["partner_type"]=>
  int(1)
  ["trade_info"]=>
  array(3) {
    ["total_fee"]=>
    float(0.01)
    ["service"]=>
    string(22) "mobile.securitypay.pay"
    ["zz_product_id"]=>
    int(2)
  }
}
string(137) "{"user_id":1,"user_token":"fsfsfs","partner_type":1,"trade_info":{"total_fee":0.01,"service":"mobile.securitypay.pay","zz_product_id":2}}"
array(4) {
  ["user_id"]=>
  int(1)
  ["user_token"]=>
  string(6) "fsfsfs"
  ["partner_type"]=>
  int(1)
  ["notify_str"]=>
  string(10) "xx=f&fs=fs"
}
string(78) "{"user_id":1,"user_token":"fsfsfs","partner_type":1,"notify_str":"xx=f&fs=fs"}"