Extracting a property from an array of an array of objects

Question

I've got an object, containing an array of objects, containing an array of values:

stdClass Object (
    [devices] => Array (
    [0] => stdClass Object ( 
        [location] => 1
        [delegate] => 
        [type] => 1 
        [id] => 1234 
        [IP] => 1.2.3.4
        [name] => host1
        [owner] => user6 
        [security] => 15
        )
    [1] => stdClass Object (
        [location] => 2
        [delegate] => 
        [type] => 1 
        [id] => 4321 
        [IP] => 4.3.2.1
        [name] => host2
        [owner] => user9 
        [security] => 15
        )
    )
)

I want to extract just the id and name into an array in the form of: $devices['id'] = $name;

I considered using the array_map() function, but couldn't work out how to use it... Any ideas?

Why not use a function which accepts the object and returns your array then call it: $devices = myfunction($my_object); — Andy Gee
– Andy Gee, Commented Oct 20, 2016 at 23:46

RiggsFolly · Accepted Answer · 2016-10-20 23:57:07Z

1

This will generate you a new array like I think you want

I know you says that delegate is an object but the print does not show it that way

$new = array();
foreach($obj->devices as $device) {
    $new[][$device->id] = $device->name;
}

answered Oct 20, 2016 at 23:57

RiggsFolly

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Andy Gee · Accepted Answer · 2016-10-20 23:51:06Z

0

Would something like this not work? Untested but it cycles through the object structure to extract what I think you need.

$devices = myfunction($my_object);

function myfunction($ob){
    $devices = array();
    if(isset($ob->devices)){
        foreach($ob->devices as $d){
            if(isset($d->delegate->name && isset($d->delegate->id))){
                $devices[$d->delegate->id] = $d->delegate->name;
            }
        }
    }
    return($devices);
}

answered Oct 20, 2016 at 23:51

Andy Gee

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Alghi Fari · Accepted Answer · 2016-10-21 02:14:47Z

0

Im usually using this function to generate all child and parent array stdclass / object, but still make key same :

function GenNewArr($arr=array()){
    $newarr = array();
    foreach($arr as $a=>$b){
        $newarr[$a] = is_object($b) || is_array($b) ? GenNewArr($b) : $b ;
    }
    return $newarr;
}

answered Oct 21, 2016 at 2:14

Alghi Fari

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