How to get a value from an array - php

Question

Not sure why I can't this to work. My json is:
[values] => Array
(
[0] => Array
(
[field] => id1
[value] => 985
)
[1] => Array
(
[field] => id2
[value] => 6395
)
[2] => Array
(
[field] => memo
[value] => abcde
)
I simply want the values of id2
I tried:
foreach ($json['values'] as $values) {
foreach ($json as $key=>$data) {
if ($data['field'] == 'id2') {
$result = $data['value'];
print '<br>value: '.$result;
}
}
}
Thanks. I know this should be relatively simple and I'm sure I've done this correctly before.

Answer 1

there's no need for inner loop, after the first one $values already contain the exact array that you are looking for
foreach ($json['values'] as $values) // $values contain
{
if ($values['field'] == 'id2')
{
$result = $values['value'];
print '<br>value: '.$result;
}
}

Answer 2

foreach ($json['values'] as $values) { //you're looping your first array, puttin each row in a variable $values
foreach ($values as $key=>$data) { //you're looping inside values taking the array index $key and the value inside that index $data
if ($key == 'id2') { //test if $key (index) is = to id2
print '<br>value: '.$value; // print the value inside that index
}
}
}
this is just an explanation, to what is going wrong with your code, but as #Pawel_W there is no need for the second foreach loop you can directly test
if($values['field']=='id2'){ print $values['value'];}

Answer 3

I think you just need to use array_search.
And here is recursive array_search ;

Answer 4

Assuming there might be multiple fields with the same name and you want them all as array, here's an alternative take:
array_filter(array_map(function($item) { return $item['field'] == 'id2' ? $item['value'] : null; }, $json['values']));
If your field names are always unique and you just want a single scalar:
array_reduce($json['values'], function($current, $item) { return $item['field'] == 'id2' ? $item['value'] : $current; });
(note that this one is not ideal since it will walk all the array even if match is found in first element)
And here's a gist with both in this and function form + output.