BetterPHP

i have:

<form action='index.php?act=music&action=a100b22847a2' method='POST'>
<select name='filter_options'>
  <option> View Filter </option>
  <option value="filter_allmusic">All Music</option>
  <option value="filter_mymusic">My Music</option>
</select>
<input type='submit' name='change_filter' value='Go' />
</form>
  </div>
  <div style='clear: both;'></div>
  <br />
<?php

$submit = $_POST['change_filter'];
$mymusic = $_POST['filter_mymusic'];
$allmusic = $_POST['filter_allmusic'];

if(!$submit)
{
  if($mymusic)
  {
    echo "MY MUSIC";
  }
  else if ($allmsuic)
  {
    echo "ALL MUSIC";
  }
}

?>

but it isn't detecting wether they selected my music or all music on the form.. where am i going wrong.. thanks

you need to check the value of $_POST['filter_options'] ie

if (isset($_POST['filter_options']) && $_POST['filter_options'] === 'filter_mymusic'){
    // my music
}else{
    // all music.
}

thanks