PHP - How can I append/merge onto an array with depth - php

Question

I have a database query which returns several records, however I would like to append more data to this object by typing the array as an object so that I can for example add more data to the output than the database contains.
I have done some research on this and found some functions such as array_merge but whenever I attempt to use this it gave me issues related to the array's depth and sometimes even created an entirely new array key instead of adding onto the currently existing ones.
This is the data from my database:
Array
(
[Cat] => Array
(
)
[Dog] => Array
(
)
[Rabbit] => Array
(
[0] => stdClass Object
(
[name] => fluffy
[owner] => foobar
)
[1] => stdClass Object
(
[name] => toby
[owner] => foobar
)
[2] => stdClass Object
(
[name] => josie
[owner] => Joseph
)
)
)
I'd like to make it so that every array key which exist have an extra field but other animals remain empty if they do not have any records.
Example:
Array
(
[Cat] => Array
(
[0] => stdClass Object
(
[name] => ralph
[owner] => Joseph
[extra] => some extra data
)
)
[Dog] => Array
(
)
[Rabbit] => Array
(
[0] => stdClass Object
(
[name] => fluffy
[owner] => foobar
[extra] => some extra data
)
[1] => stdClass Object
(
[name] => toby
[owner] => foobar
[extra] => some extra data
)
[2] => stdClass Object
(
[name] => josie
[owner] => Joseph
[extra] => some extra data
)
)
)
The reason I am attempting to merge the two is because I have several helper functions which generate pretty results and I'd like to utilize them rather than output the raw data from the database, the extra data is demonstration of how i'd like to merge onto the current array.
Thanks!
EDIT - Updated code:
function listPets(){
$foo = [];
foreach($pets as $p){
$getPets = $database->Findall("SELECT name, owner, info FROM pets...");
$foo[$p->name] = $getPets;
foreach($foo as $arr){
if(count($arr)){
foreach($arr as $v){
$v->extra = $this->message($getPets->info);
}
}
}
}
return $foo;
}

Answer 1

The solution is:
Loop through the array using foreach loop.
Check if the inner array is empty or not.
If the inner array is not empty then loop through it and append extra property to each of the objects.
So your code should be like this:
// Suppose $array is your original array
foreach($array as $arr){
if(count($arr)){ // check if the array is empty or not
foreach($arr as $v){
$v->extra = 'some extra value'; // append extra property to the object
}
}
}
// display $array
echo '<pre>';
print_r($array);
echo '</pre>';
Here's the demo:
Live Demo

Answer 2

Are you actually trying to merge two arrays or just append some extra information to the non-empty keys in the array of animals?
In the second case, depending on the information you want to add, there's two ways you could go:
Add it to the SELECT statement:
SELECT name, owner, 'extra stuff' as extra FROM ...
Do it like #rajdeep-paul said. Only you can skip the empty array check, if it's empty, foreach will not iterate through it anyway:
foreach ($dbData as $animals) {
foreach ($animals as $animal) {
$animal->extra = 'extra stuff';
}
}

Answer 3

The function below merges arrays & objects:
UPDATE
<?
function fuse_data()
{
$list = func_get_args();
$data = array_shift($list);
$type = gettype($data);
$data = ((array)$data);
foreach ($list as $indx => $item)
{
foreach ($item as $name => $valu)
{
if (!isset($data[$name]) || empty($data[$name]))
{
$data[$name] = $valu;
}
}
}
return (($type == 'object') ? ((object)$data) : $data);
}
?>
Use it like this:
$data = fuse_data($result, $node2, $list3, $foo, $bar);
Edit as you like, it's just a proof of concept.

Answer 4

You can do something like ...
foreach($pets as &$pet) { // passing by reference to manipulate the original array.
if(!empty($pet) && is_array($pet)){ // Checking if the element is an array and not empty
foreach($pet as &$feature){ // Again passing by reference the 2nd dimension
if(is_object($feature)){ // Checking if the element is object to prevent the "Property of non-object" error.
$feature->extra = 'Some value'; // If all is well, we asign the new property to the object.
}
}
}
}
Now even though I think there are better ways to write(optimize) a query than firing it inside a loop!!! but just for the sake of your question, your code should be like..
function listPets(){
$foo = [];
foreach($pets as $p){
$getPets = $database->Findall("SELECT name, owner, info FROM pets...");
$foo[$p->name] = $getPets;
foreach($foo as $arr){
if(is_array($arr) && count($arr)){
foreach($arr as $v){
if(!empty($v) && is_object($v)){
$v->extra = $this->message($getPets->info);
}
}
}
}
}
return $foo;
}