Untitled

<!DOCTYPE HTML>
<html lang="en-US">
<head>
	<meta charset="UTF-8">
	<title></title>
</head>
<body>
	<?php
		function ab($a,$b){
			 $c=$a+$b;
			 return $c;
		}
		function cd($d,$e){
			$f=$d*$e;
			return $f;

		}

	    function ef($g,$h,$i,$j){
			echo $g."".$h."".$i."".$j;
		}

	    function gh(){
			echo "it's ";
		}

	    function ij(){
			echo "NICE ";

		}

	  echo ab(3,4).cd(1,2)."".ef("I ","am ","doing ","math  ").gh().ij();

	?>

</body>
</html>