PHP - Nearest value from an array, 배열 가까운 값 찾기 > php

http://stackoverflow.com/questions/5464919/php-nearest-value-from-an-array

I've the following array:

array(0, 5, 10, 11, 12, 20)

How can I find find the "nearest" value of a needle?

Examples:

• Search: 0, return 0
• Search: 2, return 0
• Search: 3, return 5 // Nice if can be a parameter.
• Search: 4, return 5
• Search: 5, return 5
• Search: 11, return 11
• Search: 19, return 20
• Search: 20, return 20

function getClosest($search, $arr) {
   $closest = null;
   foreach ($arr as $item) {
      if ($closest === null || abs($search - $closest) > abs($item - $search)) {
         $closest = $item;
      }
   }
   return $closest;
}