Checking JSON empty array parameter on PHP?

Asked Jul 19 '18 at 15:28

Active Jul 19 '18 at 15:30

Viewed 42 times

I have decoded a JSON message using a PHP script. I would like to check if one of the parameters (which is a blank array i.e. array()) is blank but I cannot find the value to check it against in an if statement.

To clarify what I am referring to, here is an example in JSON format:

"contexts": [],
"metadata": {
  "intentId": "8c7c5399-7eba-41ea-bda7-42075813a922",
  "webhookUsed": "true",
  "webhookForSlotFillingUsed": "false",
  "isFallbackIntent": "false",
  "intentName": "broom1.off.time"
}

It is the "contexts": [] value I would like to check against. In my PHP script I have the following code to do so:

if ($update["contexts"] == array()) {
    // do_something_here
}

N.B. $update has used the json_decode method to get the values of the JSON file. My question is, what is the value of that contexts paramenter?

Thanks.

edited Jul 19 '18 at 15:30

Alessio Cantarella

5,077
3
27
34

asked Jul 19 '18 at 15:28

Louis Puchowski

1

http://php.net/manual/en/function.empty.php or http://php.net/manual/en/function.is-array.php and `empty`. – AbraCadaver Jul 19 '18 at 15:29
The value is empty. There is nothing. I don't understand the question – Andreas Jul 19 '18 at 15:31
But what you have should work https://3v4l.org/Q0Fk6 maybe better with `===` – AbraCadaver Jul 19 '18 at 15:32
What are you currently getting as the result? What makes you think that it is _not_ working? – Patrick Q Jul 19 '18 at 15:35
use `json_decode(URL,true)` and then check if `empty($update['contexts')` is true – Mobin F.R.G Jul 19 '18 at 15:36
It is important to use `true` as the second parameter of json_decode() – Mobin F.R.G Jul 19 '18 at 15:36
It's working now, I'm using DialogFlow and it was being very temperamental... Thanks for all your help! – Louis Puchowski Jul 19 '18 at 15:45

Checking JSON empty array parameter on PHP?

0 Answers0