PHP: Extract value from JSON array

Question

I have an API that takes parameters from a post through JSON and I want to extract one of the values in an array for a key value pair. However, despite many attempts, I can't get it to work.

Here is my code:

$json = file_get_contents('php://input'); 
$request = json_decode($json, true);
$parameters = $request["result"]["parameters"];

When I log $parameters to a text file, it log as

 {"numberofhits":"5"}

However, my efforts to capture the value 5 are not working:

$numhits = $json['numberofhits']; logs as empty.

So does:

$numhits = $parameters->numberofhits;

How can I capture the value 5 in a variable?

What do you get when you var_dump() the $parameters variable? — Jeremy Harris
– Jeremy Harris, Commented May 11, 2017 at 18:14
according to your code $json is just a string from a file. No way $json['numberofhits'] will work — adjan
– adjan, Commented May 11, 2017 at 18:15
@adjan He might have made a typo asking the question. The $parameters->numberofhits should have worked just fine. Something doesn't add up. — Jeremy Harris
– Jeremy Harris, Commented May 11, 2017 at 18:17
Not sure how to var_dump in this case. To see output I have to log to text file as input is coming from a third party. — zztop
– zztop, Commented May 11, 2017 at 18:18
if your data is being posted, i think php will take ur json and serialize it to the $_POST array global variable. $numHits = $_POST['result']['parameters'] — victor
– victor, Commented May 11, 2017 at 18:19

Rabin · Accepted Answer · 2017-05-11 18:23:38Z

1

From your code above $json is a string and not a json object, your should use $request to access numberofhits

$request['numberofhits']

answered May 11, 2017 at 18:23

Rabin

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Comments

gaganshera · Accepted Answer · 2017-05-11 18:20:12Z

0

If your $parameters just shows {"numberofhits":"5"}, this means your post request just returned a json of a json. Try json decoding $parameters again like json_decode($parameters, true); and log that result. It should log the desired array.

answered May 11, 2017 at 18:20

gaganshera

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2 Comments

zztop Over a year ago

When I log that it is empty.

gaganshera Over a year ago

Are you sure your $parameters just shows {"numberofhits":"5"}? Coz if it does, the above should work just fine.

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