选择的每个下拉列表的PHP

我这里有一段代码

<form action="InvoiceNotice.php?action=invoicenotice" method="post">
<label for="fordays">Select Day</label>
<select name="daySelected" id="daySelected">
<option value="0">Today</option>
<?php
$array = array_combine(range(1,$InvoiceDaysArray['days']), range(1,$InvoiceDaysArray['days']));
foreach($array as $row => $value){
    $selected = '';
    $daySelected = 0;
    if($daySelected == $row){
    $selected = 'SELECTED';
    }
    echo "<option selected='" . $selected . "' value='" . $row . "'>" . $value . " days ago</option>";
}
?>
</select>
<input type="submit" name="button" id="button" value="Submit" />
</form>

我的问题是$selected$daysSelected变量来自所选的变量。我试图做的是，当用户选择一个选项时，该选项现在在下拉列表中被选中，在客户端点击submit之后，页面返回

有人知道我在说什么吗

---

谢谢

我会这样做：

foreach($array as $row => $value){
    $selected = '';
    if($_POST['daySelected'] == $row){
        $selected = ' selected="selected"';
    }
    echo "<option" . $selected . " value='" . $row . "'>" . $value . " days ago</option>";
}

---

虽然您可能只需要selected而不需要selected=selected。

我发现您的代码中存在一些问题： 首先设置$daySelected=0；然后尝试与数据库中的变量进行比较，第0天不在foreach循环中，请尝试以下操作

    <form action="InvoiceNotice.php?action=invoicenotice" method="post">
<label for="fordays">Select Day</label>
<select name="daySelected" id="daySelected">
<option value="0">Today</option>
<?php
$array = array_combine(range(1,$InvoiceDaysArray['days']), range(1,$InvoiceDaysArray['days']));
foreach($array as $row => $value){
    $selected = '';
    $daySelected = $_POST['daySelected'];
    if($daySelected == $row){
    $selected = "selected=SELECTED";
    }else {$selected='';}
    echo "<option '" . $selected . "' value='" . $row . "'>" . $value . " days ago</option>";
}
?>
</select>
<input type="submit" name="button" id="button" value="Submit" />
</form>