PHP Salt

$str = someFunc(5,6);


function someFunc($a,$b)
{
	$r = myFunc($a,$b);
	print "res: $r\r\n";
}




// we wrap our real function with this code
function myFunc($a,$b) // wrapper function
{
	$cDir = "/tmp";	// cache dir
	$uk = md5("{$a}{$b}");	// uniq key representing the variables (used for filename)
	$cTime = 2;	// cache time in seconds

	$res = psFnCacheRead($cDir,$uk,$cTime);

	if ($res == false) {
	  $res = psFnCacheWrite(myFunc_($a,$b),$cDir,$uk);
	  }

	return $res;
}


// here is the real function
function myFunc_($a,$b)
{
	return $a + $b;
}

function psFnCacheWrite($cData,$cDir,$uk)
{
	$trace = debug_backtrace();
	$fnName =$trace[1]['function'];

	$cDir .= "/{$fnName}";
	@mkdir($cDir,0755,true);

	$cFile = "{$cDir}/{$uk}.ps";
	$res = psCacheWrite($cData,$cFile);
	return $cData;
}


function psFnCacheRead($cDir,$uk,$cTime)
{
	$trace = debug_backtrace();
	$fnName =$trace[1]['function'];
	$cDir .= "/{$fnName}";
	$cFile = "{$cDir}/{$uk}.ps";
	$res = psCacheRead($cFile,$cTime);
	return $res;
}