Enhancing the PHP code templates

Hello,

very nice tool!

My suggestion:

In case of

``` json
...
"postData": {
"mimeType": "application/x-www-form-urlencoded",
"params" : [
{
"name": "params[IDENTIFIER]",
"value": "DUMMY_ACCOUNT"
},
{
"name": "params[OPERATIONTYPE]",
"value": "create"
},
}
...
```

it would be nice that in the php code to have something like

```
...
CURLOPT_POSTFIELDS => http_build_query([
'params[IDENTIFIER]' => 'DUMMY_ACCOUNT',
'params[OPERATIONTYPE]' => 'create',
])
...
```

instead of

```
...
CURLOPT_POSTFIELDS => "params%5BIDENTIFIER%5D=DUMMY_ACCOUNT¶ms%5BOPERATIONTYPE%5D=create"
...
```