php - Unable to pass form values using POST method

Question

I'm trying to pass multiple values from the input form (checkboxes) with POST method, but only one of values is dumping, no matter how many checkboxes are checked.. What am i doing wrong?

var_dump($_POST);

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

Code:

<?php
$l = $_POST['LT'];
$pals = '';

$r = mysql_query("SELECT DISTINCT pal_num FROM pl_tab WHERE lt_num='$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>';
?>

Answer 1

You should post an array (note the square brackets after pal_num:

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

Also, your if construct is incorrect, you 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>';
}