get stdclass object array cat_id value? - php

Question

How to get cat_id ?
Array
(
[0] => stdClass Object
(
[id] => 17
[res_id] => 10
[cat_id] => 3
)
[1] => stdClass Object
(
[id] => 18
[res_id] => 10
[cat_id] => 4
)
[2] => stdClass Object
(
[id] => 52
[res_id] => 19
[cat_id] => 1
)
[3] => stdClass Object
(
[id] => 53
[res_id] => 19
[cat_id] => 3
)
[4] => stdClass Object
(
[id] => 54
[res_id] => 19
[cat_id] => 4
)
I want cat_id from all stdClass Object array.
how can i get this ?
Can anyone help me how do I retrieve the value of cat_id?
Thanks.

Answer 1

Try this
$Your_array
foreach($Your_array AS $Cat){
echo $Cat->cat_id;
}

Answer 2

You can use array_map. For example, if your source array is $array:
$result = array_map(function($x){
return $x->cat_id;
}, $array);
print_r($result);
That will give you:
Array
(
[0] => 3
[1] => 4
[2] => 1
[3] => 3
[4] => 4
)
Demo

Answer 3

$array = array();
$object = new stdClass;
$object->id= "ID";
$object->res_id = "RES_ID";
$object->cat_id = "CAT_ID";
$array[] = $object;
To Access to object attribute:
echo $array[0]->cat_id;
You can replace 0 with index and iterate it in array:
for($index=0;$index<count($array);$index++){
if(isset($array[$index]->cat_id)){
// Do something...
}
}

Answer 4

Object properties in PHP are accessed using the -> syntax. To get the cat_id property of each item in the array, you could loop through the array to get each item one by one, and store the cat_id property of the objects in a new array, like so:
$cat_ids = array();
foreach($array as $item){
$cat_ids[] = $item->cat_id;
}
print_r($cat_ids);
Gives:
Array
(
[0] => 3
[1] => 4
[2] => 1
[3] => 3
[4] => 4
)
If you don't need all the cat_ids, but just the one for a specific object in your original array, you can use
$array[2]->cat_id;
Which would get the cat_id property of the 3rd item in your array.