array_pluck

gistfile1.php

<?php
	/**
	 * Pluck an array of values from an array.
	 *
	 * @param  array   $array
	 * @param  string  $value
	 * @param  string  $key
	 * @return array
	 */
	function array_pluck($array, $value = null, $key = null)
	{
		$results = array();

		foreach ($array as $item)
		{
			if(is_null($value))
			{
				$itemValue = $item;	
			}
			else
			{
				$itemValue = is_object($item) ? $item->{$value} : $item[$value];
			}

			// If the key is "null", we will just append the value to the array and keep
			// looping. Otherwise we will key the array using the value of the key we
			// received from the developer. Then we'll return the final array form.
			if (is_null($key))
			{
				$results[] = $itemValue;
			}
			else
			{
				$itemKey = is_object($item) ? $item->{$key} : $item[$key];

				$results[$itemKey] = $itemValue;
			}
		}

		return $results;
	}