显示具有最高值的变量

I have four variables these variables are textfields.

I want to output the one with the highest value and display its value and display its name.

<?php 
 $a = array($_SESSION['musicM'], $_SESSION['preach'],$_SESSION['techno'],$_SESSION['profess']); 
 $value = min($a);
 $name = $_POST['$value'];  
    print_r ($value);
    print_r($name);

    ?>

this might help you

 $a = array($_SESSION['musicM'], $_SESSION['preach'],$_SESSION['techno'],$_SESSION['profess']); 
 $value = max($a);

and get the corresponding key

$key = array_search($value, $array);