Get key of a 3 dimensional array - php

Question

Below is dump of how my array looks like. There is inner array called officers and I would want to loop through it and check if there is officer of a specific name and if so I would want to get the index key of the outer array.
'edges' =>
array (size=59)
0 =>
array (size=3)
'source' => int 0
'target' => int 12
'officers' =>
array (size=1)
0 => string 'PARKER, Thomas, Sir' (length=19)
1 =>
array (size=3)
'source' => int 0
'target' => int 19
'officers' =>
array (size=1)
0 => string 'STEVENS, Anne' (length=13)
So if I checked for STEVENS, Anne I would want to get key 1.
Here is code I found in a different question it works with 2d arrays but not with 3d array.
function array_search_inner ($array, $attr, $val, $strict = FALSE) {
// Error is input array is not an array
if (!is_array($array)) return FALSE;
// Loop the array
foreach ($array as $key => $inner) {
// Error if inner item is not an array (you may want to remove this line)
if (!is_array($inner)) return FALSE;
// Skip entries where search key is not present
if (!isset($inner[$attr])) continue;
if ($strict) {
// Strict typing
if ($inner[$attr] === $val) return $key;
} else {
// Loose typing
if ($inner[$attr] == $val) return $key;
}
}
// We didn't find it
return NULL;
}

Answer 1

Since there can be several index keys that fit the condition, it is reasonable to implement the function as a generator:
function getOfficerIndexKey($data, $officerName) {
foreach ($data['edges'] as $key => $value) {
in_array($officerName, $value['officers']) && (yield $key);
}
}
Now you can iterate over all found values:
foreach (getOfficerIndexKey($data, 'STEVENS, Anne') as $indexKey) {
// Do something
}
As well as just get the first found one:
getOfficerIndexKey($data, 'STEVENS, Anne')->current();