find matching in multidimensional array - php

Question

I have the following array:
$data['standard'][36][2] = 52.5;
$data['standard'][42][2] = 57.5;
$data['standard'][48][2] = 62.5;
$data['standard'][54][2] = 67.5;
$data['standard'][60][2] = 72.5;
$data['standard'][36][3] = 60.5;
$data['standard'][42][3] = 65.5;
$data['standard'][48][3] = 70.5;
$data['standard'][54][3] = 75.5;
$data['standard'][60][3] = 80.5;
$data['standard'][72][3] = 90.5;
i'm trying to return the keys of the third index where the first two match. e.g. for 'standard' and 48 need an array(2,3)
but for 'standard' and 72 i would return array(3)
Also I'm wondering if I should store this data in xml or something similar?

Answer 1

Try this:
$result = array_keys($data['standard'][48];
This just returns the keys of the $data['standard'][48] array: 2 and 3.

Answer 2

You can use something like this:
function findInArray(&$data,$param1,$param2)
{
return isset($data[$param1][$param2]) ? array_keys($data[$param1][$param2]) : array();
}
Example:
$keys = findInArray($data,"standard",48); // array(2,3);
$keys = findInArray($data,"standard",72); // array(3);
It is fine to use an array for storing data, if this is easier for you to handle.