Description:
------------
Incorrect result of intval function or combination of functions where intval present.

Reproduce code:
---------------
/* Rounds float by tuncating any numbers after second digit since decimal point */
function myRound($f) {
	/* Step by step trace */
	print "--Begin--\n\t\t";
	print floatval($f);													print "\n\t\t";
	print 100.0*floatval($f);										print "\n\t\t";
	print intval(100.0*floatval($f));						print "\n\t\t";	//This line working incorrect, cause intval(4023) must be 4023 not 4022!!!!
	print intval(100.0*floatval($f))/100.0;			print "\n\t";
	print "--End--\n";
	
	return sprintf("%.2f",intval(100.0*floatval($f))/100.0);
}
//////Error appears only with this number, any other number i've tried gave the correct result
$a=40.2396;
print "----Lets try $a\n\t";
$a=myRound($a);
print "----Returned:";print $a;print "\n\n";
print "----Lets try $a\n\t";
$a=myRound($a); //a==40.23
print "----Returned:";print $a;print "\n\n"; //a==40.22!!!!!!!!

Expected result:
----------------
----Lets try 40.2396
	--Begin--
		40.2396
		4023.96
		4023
		40.23
	--End--
----Returned:40.23

----Lets try 40.23
	--Begin--
		40.23
		4023
		4023
		40.23
	--End--
----Returned:40.23

Actual result:
--------------
----Lets try 40.2396
	--Begin--
		40.2396
		4023.96
		4023
		40.23
	--End--
----Returned:40.23

----Lets try 40.23
	--Begin--
		40.23
		4023
		4022
		40.22
	--End--
----Returned:40.22