extended foreach method with extra information about first and last elements, number of elements, actual index

foreach_ext.php

<?php
/**
 * Call callback function for every element of an array and provide some extra information for each element
 * 
 * @param array $array
 * @param Callback/Closure $callback
 *	Callback/Closure must have 6 parameters
 *		mixed key: key of item
 *		mixed value: value of item
 *		integer counter: human readable index of item; starts with 1
 *		integer index: index of item; starts with 0
 *		integer num: totalcount of elements
 *		boolean first: is first element
 *		boolean last: is last element
 */
function foreachExt($array, $callback)
{
	$num = count($array);
	$counter = 1;
	foreach($array as $k=>$v)
	{
		$first = $counter == 1;
		$last = $counter == $num;

		call_user_func_array($callback, array($k, $v, $counter, $counter-1, $num, $first, $last));

		$counter++;
	}
}

/*
 * example usage
 */
$array = array('First', 'Middle 1', 'Middle 2', 'Middle 3', 'Last');
foreachExt($array, function($k, $v, $counter, $index, $num, $first, $last)
	{
		var_dump($k, $v, $counter, $index, $num, $first, $last);
	}
);