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@ 2014-02-16T15:59:47Z

<?php
function computeCombination(array $source,$picks,$startIndex=0,array $pad=array())
{
	if($picks<=0)
	{
		return $pad;
	}
	elseif($picks>=count($source)-$startIndex)
	{
		return array(array_merge($pad,array_slice($source,$startIndex)));
	}
	$result=array();
	foreach(range($startIndex,count($source)-$picks) as $subStartIndex)
	{
		$subPad=$pad;
		$subPad[]=$source[$subStartIndex];
		if(empty($pad))// to make the output look nice
		{
			$result=array_merge($result,computeCombination($source,$picks-1,$subStartIndex+1,$subPad));
		}
		else
		{
			$result=array_merge($result,array(computeCombination($source,$picks-1,$subStartIndex+1,$subPad)));
		}
	}
	return $result;
}
print_r(computeCombination(array(1, 2, 3, 4, 5, 6, 7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80),10));

Output for git.master, rfc.property-hooks: Fatal error: Out of memory (allocated 35651584 bytes) (tried to allocate 20480 bytes) in /in/ki6c2 on line 23 mmap() failed: [12] Cannot allocate memory mmap() failed: [12] Cannot allocate memory
Process exited with code 255.
Output for git.master_jit: Fatal error: Out of memory (allocated 18874368 bytes) (tried to allocate 20480 bytes) in /in/ki6c2 on line 16 mmap() failed: [12] Cannot allocate memory mmap() failed: [12] Cannot allocate memory
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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