php - Unable to pass form values using POST method -

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i'm trying pass multiple values input form (checkboxes) post method, 1 of values dumping, no matter how many checkboxes checked.. doing wrong?

var_dump($_post);

result : array(2) { ["pal_num"]=> string(1) "2" ["post"]=> string(3) "go!" }

code:

<?php $l = $_post['lt']; $pals = '';  $r = mysql_query("select distinct pal_num pl_tab lt_num='$l'");  while($row = mysql_fetch_assoc($r)) {     $pals .= '<input type="checkbox" name="pal_num" value="'.$row['pal_num'].'">'.$row['pal_num'].'<br>'; }  if($pal == '')     echo ''; else echo '<form name="get_pal" action="post.php" method="post">'; echo $pals; echo '<input type="submit" name="post" value="go!">'; echo '</form>'; ?>

you should post array (note square brackets after pal_num: 

$pals .= '<input type="checkbox" name="pal_num[]" value="'.$row['pal_num'].'">'.$row['pal_num'].'<br>';

also, if construct incorrect, should use brackets:

if($pal == '') {     echo ''; } else {     echo '<form name="get_pal" action="post.php" method="post">';     echo $pals;     echo '<input type="submit" name="post" value="go!">';     echo '</form>'; }

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