How to write if condition between two numbers in php or laravel

In this tutorial im goin to describe how to write if else condition between two numbers in php or laravel.

<?php

$a= 65;
$b= 9;

if($a<$b)
    {
        echo  "$a this is correct";
    }

else{
    echo "$b this is greater than $a";
}


?>

Thanks.