Data type indentify in javascript and php

/* define data type in php*/
<?php
$name = 'Firoze';
var_dump(gettype($name));

?>

/* define data type in javascript*/

/*
null is object
true or false boolean
1,2....etc like this is  number
anything in '' or "" that are string
like this 555555555555555*'abc' is NaN but a number
*/

var what_type = 555555555555555*'abc';

console.log(what_type);
console.log(typeof what_type);