How to access nested JSON in PHP

Question

I'm trying to access "note_id" in a JSON object.

php code

<?php

$test = 
'{"username":"Ellaleeeeeee",
  "event_source":"browser",
  "event":
  "{
     \"notes\": [{\"note_id\": \"2771\"}]
  }"
}';

$jarray = json_decode($test, true);
$jevent = json_decode($jarray['event'], true);

var_dump($jevent);

?>

I tried $jevent['notes']['note_id'][0] but failed.

Please kindly tell me what I am supposed to do. Thanks!

$jarray is already decoded, no need to decode it again in $jevent = .... $jevent = $jarray['event']; — user8034901
– user8034901, Commented May 20, 2019 at 7:26
@kerbholz Apparently the OP has another JSON string inside event which was initially a string. — mighty_dev
– mighty_dev, Commented May 20, 2019 at 7:27
@vivek_23 Yeah, realized this just now, thanks for pointing out — user8034901
– user8034901, Commented May 20, 2019 at 7:28
The order of your keys is incorrect. It should be $jevent['notes'][0]['note_id']. — mighty_dev
– mighty_dev, Commented May 20, 2019 at 7:28
it should be $jevent['notes'][0]['note_id'] not $jevent['notes']['note_id'][0] — fmsthird
– fmsthird, Commented May 20, 2019 at 7:52

Death-is-the-real-truth · Accepted Answer · 2019-05-20 07:33:01Z

3

You need to change code a bit like below:-

$jarray = json_decode($test, true);
$jevent = json_decode($jarray['event'], true);
echo $jevent['notes'][0]['note_id'];

Output:-https://3v4l.org/0sOfm

In case you want to get all note_id then use foreach()

<?php

$test = 
'{"username":"Ellaleeeeeee",
  "event_source":"browser",
  "event":
  "{\"notes\": [{\"note_id\": \"2771\"},{\"note_id\": \"2772\"}]}"
}';

$jarray = json_decode($test, true);
$jevent = json_decode($jarray['event'], true);

foreach($jevent['notes'] as $jnotes){

    echo $jnotes['note_id'].PHP_EOL;
}

Output:-https://3v4l.org/D7t0R

edited May 20, 2019 at 7:33

answered May 20, 2019 at 7:26

Death-is-the-real-truth

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1 Comment

Cassie Liu Over a year ago

Thanks! I just edited the question because I wanna know whether indentation matters in this case. At the beginning, I formatted the code in that way and it didn't work out.

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