Short tag are alwayes available in php. So you do not need echo the first statement in your script
example:
$a =10;
<?= $a;//10
echo "Hellow";//
echo "Hellow";
?>
Suddenly you need to use for a single php script then u can use it. example:
<html>
<head>
<title></title>
</head>
<body>
<p>hellow everybody<?= hi;?></p>
<p>hellow everybody </p>
<p>hellow everybody </p>
</body>
</html>