Extract [cat_ID] from array PHP - php

Question

I have the following array (just a part of the complete array) and I want to extract the value of [cat_ID].
Array ([1] => stdClass Object ( [term_id] => 21 [name] => z_aflyst [slug] => z_aflyst
[term_group] => 0 [term_taxonomy_id] => 23 [taxonomy] => category
[description] => [parent] => 0 [count] => 1 [object_id] => 7 [cat_ID] => 21
[cat_name] => z_aflyst ))
So I need to extract the 21 in this case. However, I only want to extract the cat_ID if the cat_name equals z_aflyst.

Answer 1

Give that you have an array of objects:
Array (
[1] => stdClass Object
(
[term_id] => 21
[name] => z_aflyst
[slug] => z_aflyst
[term_group] => 0
[term_taxonomy_id] => 23
[taxonomy] => category
[description] =>
[parent] => 0
[count] => 1
[object_id] => 7
[cat_ID] => 21
[cat_name] => z_aflyst )
)
foreach ($items as $item)
{
if($item->cat_name == 'z_aflyst')
{
//do stuff
}
}

Answer 2

You have an array of standard objects, which properties can be accessed using the arrow (object) operator ->.
You can use array_filter() to filter out unwanted elements of the array:
// Assuming your array is called $items
$filtered = array_filter($items, function($v) {
return $v->cat_name === 'z_aflyst';
});
After that, you can "flatten" the array using array_map() so that it only contains the cat_ID if you wish:
$filtered = array_map(function($v) {
return $v->cat_ID;
}, $filtered);
This will leave you with a one-dimension, indexed array of cat_IDs.

Answer 3

Your array is in this example a little more than a simple array, is a standard object. And you can take advantage of this. You can the properties of a standard object by this formula:
$object->property;
in your case the object is
$object = $array[1];
or by this formula as an array
$array[key];
in your case to get the value of cat_ID:
$object->cat_ID;
So your code will be something like:
if ($object->cat_name == 'z_aflyst') {
// do stuff with your cat_ID value
echo $object->cat_ID;
}
// will echo 21 only of the cat_name has value 'z_aflyst'