(PCC)[PHP] How to Check if a numeric value is finite or infinite in PHP

(PCC)::[How-to-Check-if-a-numeric-value-is-finite-or-infinite-in-PHP]::[php]

<!DOCTYPE html>
<html>
<body>

<?php
// Check if a numeric value is finite or infinite 
$x = 1.9e411;
var_dump($x);
?>  

</body>
</html>