Question

我有一个HTML选择列表，可以选择一个选项。

<select name='price' id='price'>
<option value='' >Select....</option>
<option value='0-50,000' selected>0-50,000</option>
<option value='50,000-100,000'>50,000-100,000</option>
<option value='100,000-150,000'>100,000-150,000</option>
<option value='150,000-200,000'>150,000-200,000</option>
<option value='200,000 and above'>200,000 and above</option>
<option value='see all'>See All</option>
</select>

通过HTML提交按钮提交此列表时，此列表会再次显示在另一页中。现在，我希望用户选择的选项是新选择的值。我这样做：

<select name='price' id='price'>
<option value='{$_POST['price']}'>{$_POST['price']}</option>
<option value='0-50,000'>0-50,000</option>
<option value='50,000-100,000'>50,000-100,000</option>
<option value='100,000-150,000'>100,000-150,000</option>
<option value='150,000-200,000'>150,000-200,000</option>
<option value='200,000 and above'>200,000 and above</option>
<option value='see all'>See All</option>
</select>

但价值观出现了两次。用户选择的选项显示为已选择，仍显示在列表中。例如，我们现在有这样的事情：

0-50,000 (this is the selected value)

0-50,000

50,000-100,000

100,000-150,000

150,000-200,000

200,000 and above

我该如何解决这个问题？

Answer 1

在其他页面中，确保所选选项包含selected="selected"

<select name='price' id='price'>\
<option value='' >Select....</option>
<option selected="selected" value='0-50,000'>0-50,000</option>
<option value='50,000-100,000'>50,000-100,000</option>
<option value='100,000-150,000'>100,000-150,000</option>
<option value='150,000-200,000'>150,000-200,000</option>
<option value='200,000 and above'>200,000 and above</option>
<option value='see all'>See All</option>
</select>

Answer 2

试试这个

/**
     * Takes To values (First for option value Second for value to be compare)
     * @param Srting $option stores Option Value String
     * @param String $value Stores to be compare
     * @return String
     * @access public
     */
function selectBoxSelection($option, $value) {
        if ($option == $value) {
            return "selected";
        }
    }



 <select name='price' id='price'>

<option value='0-50,000' <?php echo selectBoxSelection('0-50,000', $_POST['price']);?> >0-50,000</option>
<option value='50,000-100,000' <?php echo selectBoxSelection('50,000-100,000', $_POST['price']);?> >50,000-100,000</option>
<option value='100,000-150,000' <?php echo selectBoxSelection('100,000-150,000', $_POST['price']);?> >100,000-150,000</option>
<option value='150,000-200,000' <?php echo selectBoxSelection('150,000-200,000', $_POST['price']);?> >150,000-200,000</option>
<option value='200,000 and above' <?php echo selectBoxSelection('200,000 and above', $_POST['price']);?> >200,000 and above</option>
<option value='see all' <?php echo selectBoxSelection('see all', $_POST['price']);?> >See All</option>
</select>

Answer 3

<select name='price' id='price'>
    <option value='' >Selec</option>
    <option value='0-50,000'<?php if($_POST['price']=='0-50,000'){echo "selected==selected";}?>>0-50,000</option>
    <option value='50,000-100,000'<?php if($_POST['price']=='50,000-100,000'){echo "selected==selected";}?>>50,000-100,000</option>
    <option value='100,000-150,000'<?php if($_POST['price']=='100,000-150,000'){echo "selected==selected";}?>>100,000-150,000</option>
    <option value='150,000-200,000'<?php if($_POST['price']=='150,000-200,000'){echo "selected==selected";}?>>150,000-200,000</option>
    <option value='200,000 and above'<?php if($_POST['price']=='200,000 and above'){echo "selected==selected";}?>>200,000 and above</option>
    <option value='see all'<?php if($_POST['price']=='see all'){echo "selected==selected";}?>>See All</option>
</select>

Answer 4

代替您的代码，

<select name='price' id='price'>
<option value='{$_POST['price']}'>{$_POST['price']}</option>
<option value='0-50,000'>0-50,000</option>
<option value='50,000-100,000'>50,000-100,000</option>
<option value='100,000-150,000'>100,000-150,000</option>
<option value='150,000-200,000'>150,000-200,000</option>
<option value='200,000 and above'>200,000 and above</option>
<option value='see all'>See All</option>
</select>

尝试这样，

<select name='price' id='price'>
<option value='' >Select....</option>
<?php foreach ($arr as $key=>$value)
{
         if($key == $_POST['price'])
         {
            echo "<option selected value=$key>$value</option>";
            unset($arr[$key]);
         }
         else
         echo "<option value=$key>$value</option>";
}?>
</select>

Answer 5

这样做：

<form name="myform" method="post" action="testsel.php">

<select name='price' id='price'>
<option value='' >Select....</option>
<option value='0-50,000' <?php if(isset($_POST["price"]) && $_POST["price"]=="0-50,000") print "selected"; ?>>0-50,000</option>
<option value='50,000-100,000' <?php if(isset($_POST["price"]) && $_POST["price"]=="50,000-100,000") print "selected"; ?>>50,000-100,000</option>
<option value='100,000-150,000' <?php if(isset($_POST["price"]) && $_POST["price"]=="100,000-150,000") print "selected"; ?>>100,000-150,000</option>
<option value='150,000-200,000' <?php if(isset($_POST["price"]) && $_POST["price"]=="150,000-200,000") print "selected"; ?>>150,000-200,000</option>
<option value='200,000 and above' <?php if(isset($_POST["price"]) && $_POST["price"]=="200,000 and above") print "selected"; ?>>200,000 and above</option>
<option value='see all' <?php if(isset($_POST["price"]) && $_POST["price"]=="see all") print "selected"; ?>>See All</option>
</select>

<input type="submit" value="submit">

</form>


<?php
    if(isset($_POST["price"]))
    print $_POST["price"];

?>

将此文件另存为＆＃34; testsel.php＆＃34;并查看。它将达到目的。

从选择列表中设置所选值时出错

5 个答案: