How to send or assign Jquery Variable value to php variable?

Question

I got the answer from this post [How to send or assign Jquery Variable value to php variable? but somehow my PHP can not get the value passed from Jquery
this is html co

Answer 1

HTML:

comp1
comp2
comp3

JS:

$('a').click(function(){        
    $.ajax({
        type: "POST",
        url: 'random.php',
        data: { name: $(this).attr('id') }
    })
    .done(function( msg ) {
        alert( msg );
    });
});

Use href="javascript:;" attr, or e.preventDefault(); inside event handler, to prevent the link executing.