PHP - Searching an array of objects

Question

I have an array of objects from class Volume. I am looking for the best way to return the _description property given an _id value (accessor method is get_description).

In the below example, I would provide "vol-e123456a3" and it would return "server E: volume".

 [0] => Volume Object
        (
            [_snapshot_count:protected] => 16
            [_id:protected] => vol-e123456a3
            [_description:protected] => server E: volume
            [_region:protected] => us-east-1
            [_date_created:protected] => DateTime Object
                (
                    [date] => 2013-04-06 10:29:41
                    [timezone_type] => 2
                    [timezone] => Z
                )

            [_size:protected] => 100
            [_state:protected] => in-use
        )

What do you mean by `the best way`, Are you trying something? — Rohan Kumar, Sep 05 '13 at 04:31
Take a look at this posting: http://stackoverflow.com/questions/4742903/php-find-entry-by-object-property-from-a-array-of-objects — Robbert, Sep 05 '13 at 04:31

score 0 · Answer 1 · answered Sep 05 '13 at 04:34

0

Try this,

$_id="vol-e123456a3";
foreach($objArray as $obj)
{
    if($obj->_id==$_id)
    {
       return isset($obj->_description) ? $obj->_description : "";
    }
}

answered Sep 05 '13 at 04:34

Rohan Kumar

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DevZer0 · Answer 2 · 2013-09-05T04:49:18.230

0

you can use the following function; the data members are marked protected so in order to access them from public side you will have to use accesor methods, which you have not specified. i have placed a guess with the most common possible accesor name.

function getValue($object_array, $filter) {
    foreach ($object_array as $object) 
       if ($object->getId() == $filter) return $object->getDescription();
    return false;
}

call it with the following params

$description = getValue($objects, 'vol-e123456a3');

if there are no public accessor methods we will need to use reflection. as follows

function getValue($object_array, $filter) {
    foreach ($object_array as $object)  {
        $class = new ReflectionClass($object);
        $prop = $class->getProperty('_id')->getValue($object);
       if ($prop == $filter) return $class->getProperty('_description')->getValue($object)
    }
    return false;
}

edited Sep 05 '13 at 04:49

answered Sep 05 '13 at 04:37

DevZer0

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7
27
51

I'm not looking any `getId()` and `getDescription()`. – Rohan Kumar Sep 05 '13 at 04:41
You have specified but you should specify the `name of methods` too – Rohan Kumar Sep 05 '13 at 04:43
@RohanKumar i've updated my answer to be more complete – DevZer0 Sep 05 '13 at 04:50

PHP - Searching an array of objects

2 Answers2