// file1.php

                 $(".signed").click(function(evt) {

		 $.post("test.php", {test: 'test'});
                 $("#test").load("test.php");
          })


// file2.php

$test = $_POST['test'];

echo $test['0'];
echo $test;


if(isset($test))
{

        echo "yes";

}
else {

        echo 'fail';

}