如何根据复选框输入使用数据回显多行？

Question

在尝试使用基于复选框输入的数据回显多行时卡住了。在当前代码中，它只处理来自一个复选框的数据，无论选中多少个复选框。请帮忙！

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="post2.php" method="POST">';
    echo $pals;
    echo '<input type="submit" name="post" value="Go!">';
    echo '</form>';
}

post2.php：

$w = $_POST['pal_num'];
$rrr = mysql_query("SELECT * FROM pl_tab WHERE pal_num" . $w[0]);

while ($row = mysql_fetch_array($rrr)) {
    echo '<tr><td>' . '&nbsp' . '</td>';
    echo '<td rowspan="5">' . $row['descr'] . '</td>';
    echo '<td><b>' . 'Total weight' . '<b></td>';
    echo '<td>' . '&nbsp' . '</td><td>' . '&nbsp' . '</td></tr>';

    echo '<td>' . '&nbsp' . '</td>';
    echo '<td colspan="3">' . '&nbsp' . '</td>';

    //this part should multiple based on how many checkboxes are ticked.
    echo '<tr><td>' . $row['l_num'] . '</td>';
    echo '<td>' . $row['pal_num'] . '</td>';
    echo '<td>' . $row['weight 1'] . '</td><td>' . $row['weight 2'] . '</td></tr>';
}
echo "</table>";
}

Answer 1

这可能会起作用：

$w = "'".implode("','",$_POST['pal_num'])."'";
$rrr = mysql_query("SELECT * FROM pl_tab WHERE pal_num in (".$w.");");

...您可能在while 之前忘记了echo "<table>"; :)