PHP: Array Map Associative

array_map_assoc.php

<?php
/**
 * Converts a linear array to its associative equivalent.
 *
 * @param $array
 *   Linear array to process.
 * @param $function
 *   Callback name to call against each value.
 *
 * @return array
 * @see http://bugs.php.net/bug.php?id=34857
 */
function array_map_assoc(array $array, $function = NULL)
{
	// array_combine() fails with empty arrays
	empty($array) OR $array = array_combine($array, $array);

	// Callback map	
	is_callable($function) AND $array = array_map($function, $array);

	return $array;
}