Get specific key values as an array from array of object

Question

This is my code:

$a = array(
    array("a" => 1, "b" => 2),
    array("x" => 2, "a" => 2),
    array("d" => 100, "a" => 3, "b" => 2, "c" => 3)
);
$myArray = array();
foreach ($a as $arr) {
    $myArray[] = $arr['a'];
}
print_r($myArray);

So, I get

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
)

Is there any other way to do this without for loop? like using one are two PHP array functions to get the same response.

The above is correct but still if there is any other better way to do this that would be appreciable! Because the same array $a in my code is required to be iterate many times. If I have any better way to do this so I can reduce another iteration( PHP still does iteration in built-in fns, I don't bother it).

possible duplicate of [Is there a function to extract a 'column' from an array in PHP?](http://stackoverflow.com/questions/1494953/is-there-a-function-to-extract-a-column-from-an-array-in-php) — John Conde, Apr 21 '14 at 13:43
It's a shame you are not using PHP 5.5. It has a function specifically for this. — John Conde, Apr 21 '14 at 13:43
http://stackoverflow.com/questions/15191903/convert-an-associative-array-to-a-simple-array-of-its-values-in-php — Tyranicangel, Apr 21 '14 at 13:45

score 3 · Accepted Answer · answered Apr 21 '14 at 13:43

3

Yes (since you're on PHP 5.4, array_column() isn't an option),

$result = array_map(function($x)
{
   return $x['a'];
}, $a);

But note, this will still use loop internally (i.e. in the end it always be a loop)

answered Apr 21 '14 at 13:43

Alma Do

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Get specific key values as an array from array of object

1 Answers1