How to extract the values from a nested array into another array

Question

This is the array I want to extract from:

Array
    (
        [0] => Array
            (
                [id] => 11
                [order_id] => 6127
            )

        [1] => Array
            (
                [id] => 12
                [order_id] => 6123
            )

    )

This is what I need:

$results = array()
$results(6127, 6123)

There can be any number of arrays within the first array.

dfsq · Accepted Answer · 2012-01-15 20:43:40Z

1

Make use of array_map:

$result = array_map(function($el) {
    return $el['order_id'];
}, $arr);

Or for PHP version prior to 5.3:

$result = array_map(create_function('$el', 'return $el["order_id"];'), $arr);

answered Jan 15, 2012 at 20:43

dfsq

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Comments

user142162 · Accepted Answer · 2012-01-15 20:35:02Z

0

Iterate through the array then add the order ids to another array:

$results = array();
foreach($arr as $item)
{
    $results[] = $item['order_id'];
}

answered Jan 15, 2012 at 20:35

user142162

2 Comments

user142162 Over a year ago

@Patrick: It's that 4th line of code: $results[] = $item['order_id']; -- $item['order_id'] is added as a new item to the array $results.

Patrick Over a year ago

gotcha. thank you. I'm still learning. I struggle with arrays. :)

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