Is there a function to extract a 'column' from an array in PHP?

Question

I have an array of arrays, with the following structure :

array(array(\'page\' => \'page1\', \'name\' => \'pagename1\')
      array(\'page\' => \'pa         


        

Answer 1

I wanted to post here, even if this is an old question, because it is still very relevant and many developers do not use PHP >= 5.5

Let's say you have an array like this:

Array
(
    [files] => Array
        (
            [name] => Array
                (
                    [0] => file 1
                    [1] => file 2
                    [2] => file 3
                )

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

            [error] => Array
                (
                    [0] => abc
                    [1] => def
                    [2] => ghi
                )

        )

)

and the output you want is something like this:

Array
(
    [0] => Array
        (
            [0] => file 1
            [1] => 1
            [2] => abc
        )

    [1] => Array
        (
            [0] => file 2
            [1] => 2
            [2] => def
        )

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

)

You can simply use the array_map() method without a function name passed as the first parameter, like so:

array_map(null, $a['files']['name'], $a['files']['size'], $a['files']['error']);

Unfortunately you cannot map the keys if passing more than one array.