VERY BASIC question... pass value to a php file.. pls help!

Hi there…
For some reason i am not able to pass a value to a php file and display it…
Any help would be appreciated…
Thanks…

My actionscript code:


m_t = "hello world";
getURL("http://localhost/reg_vis.php?m_t="+m_t, "blank");

My PHP code:


<?
$m_t = $_POST['m_t'];

print "The value is: ". $m_t . ".";
?>

PLS HELP!

thanks again…