How can I change array key for specific array value

Question

I have an multidimensional array like this:

Position 0: {id=5, name=john}
Position 1: {id=7, name=frank}
Position 2: {id=9, name=tina}

What I'm trying to do is: Change the Position Key (0,1,2) to id value for each one!

Position 5: {id=5, name=john}
Position 7: {id=7, name=frank}
Position 9: {id=9, name=tina}

I tried to use "array_flip" according to PHP Doc. But I did not succeed! But I just found reference for unidimensional arrays. Like this:

<?php
$input = array("oranges", "apples", "pears");
$flipped = array_flip($input);    
print_r($flipped);
?>

Any idea? Thanks.

u_mulder · Accepted Answer · 2017-12-04 06:03:08Z

2

A simple oneliner:

$new_array = array_combine(
    array_column($your_array, 'id'),    // these are keys
    $your_array                         // these are values
);

answered Dec 4, 2017 at 6:03

u_mulder

54.8k5 gold badges54 silver badges72 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Luke Over a year ago

I like that you expanded the one-liner to multiple lines to include the explanation of the arguments.

Andreas Over a year ago

I would make it: $new_array = array_combine( array_column($your_array, 'id'), array_column($your_array, 'name')); making the array flat since the ID is the key anyways.

Collectives™ on Stack Overflow

How can I change array key for specific array value

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related