Double equals and tripple equals in php

Question

I searched on StackOverflow and Google and I can\'t find the answer to this question:

Should we always use the triple equal in PHP for validation?

For exampl

Answer 1

if (is_numeric($x) && $x == '1') { ...

This looks redundant to me. Why do we need to check if $x is_numeric AND the value '1'? We know '1' is numeric so if it is equal to '1' then it must be a number.

---

You could use === comparison:

If you're fine with interpreting it as a string:

if ($x === '1') { ...

or

If you must interpret the value as an int

if ((int) $x === 1) { ...

or

If you don't care about the actual type:

if ($x == '1') { ...