如果PHP包含某些值，则创建数组

Question

I have $fruits_arr:

Array
(
    [0] => Array
        (
            [id] => 213
            [fruit] => banana
        )

    [1] => Array
        (
            [id] => 438
            [fruit] => apple
        )

    [2] => Array
        (
            [id] => 154
            [fruit] => peach
        )
)

And $ids_arr:

Array ( 
  [0] => 213
  [1] => 154 
)

I want to recreate $fruits_arr to have only array items where id is equal to a value from $ids_arr. I also want to maintain the index/array order of $fruits_arr.

I'm using the following:

$selected_fruits = array();

foreach( $fruits_arr as $fruit ) :
    if ( in_array( $fruit['id'], $ids_arr ) ) :
        $selected_fruits[] = $fruit;
    endif;
endforeach;

print_r( $selected_fruits );

It seems to work but I am wondering if there is a shorter, better way to accomplish this in the latest PHP version.

Answer 1

You could use array_filter to make it more concise, but it will not be much and could make your code less readable. If possible chose readability over length of code.

$selected_fruits = array_filter($fruits_arr, function ($el) use ($ids_arr) {
    return in_array($el['id'], $ids_arr, true);
});

or you can wait for PHP 7.4 (due to come out at the end of the year) and use arrow functions.

$selected_fruits = array_filter($fruits_arr, fn ($el) => in_array($el['id'], $ids_arr, true));

Demo: https://3v4l.org/4UC41