Fastest way to check if a given array value matches another array value?

Question

I know this is a 0(n) relationship, where we need to check for every single row of array for membership, but what is the fastest way to do the check?

$x = [["id" =>61, "name" => "jill"],["id" =>1, "name" => "john"],];
$y = [["id" =>89, "state" => "drunk"],["id" =>61, "state" => "sleep"]];

$z = array_values_collide($x, $y, "id");

where z should return:

$z = [["id" =>61, "name" => "jill", state => "sleep"];

Diego · Accepted Answer · 2012-03-02 15:26:57Z

1

If I understand correctly, you want all elements in $x that are also in $y. The result is called the intersection of both arrays. See function array_intersect_assoc. I am sure PHP developers took care of implementing it to be as fast as possible.

answered Mar 2, 2012 at 15:26

Diego

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Martin Rothenberger · Accepted Answer · 2012-03-02 15:27:14Z

0

Use array_intersect_assoc to get the values which are present both arrays. And/or check the other intersect commands.

http://www.php.net/manual/en/function.array-intersect-assoc.php

answered Mar 2, 2012 at 15:27

Martin Rothenberger

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