数组的数组和没有循环的数组数组

Question

Let's say I have a data set in PHP that is in the form of:

$array = [{"prior":"0","id":"61039","type":"todo"},
{"prior":"1","id":"70341","type":"todo"},
{"prior":"3","id":"39104","type":"todo"},
{"prior":"4","id":"70315","type":"todo"},
{"prior":"6","id":"72050","type":"todo"},
{"prior":"7","id":"72329","type":"todo"},
{"prior":"8","id":"73992","type":"todo"}]

I want to process this array of arrays so that I have a single array with integer indexes and the values of only id. It's trivial to simple use loops:

$data = array();
foreach($array as $item){
    $data[] = $item['id'];
}

What I want to know, is there a way to do this, disregarding efficiency, using the built in array functions of PHP (with no loops), or am I stuck using the foreach loop?

Answer 1

You can use array_map() for this:

$data = array_map(function ($el) { return $el['id']; }, $array);

Note that this still has to perform the looping internally; it's just not shown explicitly as in a foreach loop. This approach will be far less efficient than a plain 'ol foreach.

Demo