Extract [cat_ID] from array 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.

Sure you could use this as a starter: http://stackoverflow.com/questions/7694843/using-array-search-for-multi-dimensional-array — bestprogrammerintheworld, May 07 '14 at 10:47

ka_lin · Accepted Answer · 2014-05-07T10:52:56.970

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
    }
}

edited May 07 '14 at 10:52

answered May 07 '14 at 10:37

ka_lin

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1

where did $items come from? – Afghan Dev May 07 '14 at 10:39
You have var_dump-ed an array containing stdClass objects (currently 1 object) as I can see it..no code was provided... – ka_lin May 07 '14 at 10:40
$items is that array you posted in your initial post. – Tanatos May 07 '14 at 10:40
1

he assumed $items=array(..your array..); – Rotari Radu May 07 '14 at 10:41
1

you dont need to foreach.. this will go through all elements without the need for that – Elzo Valugi May 07 '14 at 10:43
@ElzoValugi You missed the part in the question where OP states "just a part of the complete array" – rink.attendant.6 May 07 '14 at 10:50
1

@ Elzo Valugi: Why? He has an array of objects. – ka_lin May 07 '14 at 10:50
I think he meant that his array has more keys than the one that is showing. – Elzo Valugi May 07 '14 at 10:51
My array has a lot of keys. The "power" of Wordpress ;) But this solution works. Thanks! – Rvervuurt May 07 '14 at 10:53

score 0 · Answer 2 · edited May 23 '17 at 12:28

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'

score 0 · Answer 3 · answered May 07 '14 at 10:46

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.

Extract [cat_ID] from array PHP

3 Answers3