根据值从数组中删除元素

Question

I have the following PHP array (this is a simplified version for illustration) $myarray:

Array
(
    [0] => Array
        (
        [firstName] => Zaphod
        [show_nav] => yes
        [lastName] => Beeblebrox
        )

    [1] => Array
        (
        [firstName] => Ford
        [show_nav] => 
        [lastName] => Prefect
        )

    [2] => Array
        (
        [firstName] => Arthur
        [show_nav] => yes
        [lastName] => Dent
        )

    [3] => Array
        (
        [firstName] => Tricia
        [show_nav] => 
        [lastName] => McMillan
        )
)

I need to remove the entries where show_nav is not set to yes, and produce a new array with the results. So afterwards it would look like this - $myarray:

Array
(
    [0] => Array
        (
        [firstName] => Zaphod
        [show_nav] => yes
        [lastName] => Beeblebrox
        )

    [1] => Array
        (
        [firstName] => Arthur
        [show_nav] => yes
        [lastName] => Dent
        )
)

The array can be any length, with show_nav being set to yes for any number of entries. I know how to remove specific entries, but I am not sure how to look through the array and remove entries based on the values.

Any help greatly appreciated!

Answer 1

There are countless ways to achieve this simple goal. One of them uses the PHP function array_filter()

$filtered = array_filter(
    $myarray,
    function (array $item) {
        return array_key_exists('show_nav', $item) && $item['show_nav'] === 'yes';
    }
);