我只想在将代码发送到 Iframe 后保持列表框项目的选中状态，但我真的不知道该怎么做...这是我的代码 ^^
<?PHP
if(isset($_POST['options'])){
$epinum = $_POST['options'];
}
?>
<form action="" method="post">
<SELECT class='listofepisodes' NAME='options' onchange='this.form.submit()' size='1200'>
<?PHP
$options=mysql_query("SELECT * FROM table");
while($option=mysql_fetch_array($options)) {
$image=$option['link'];
$number=$option['number'];
?>
<option value="<?PHP echo $image; ?>">Option <?PHP echo $number; ?></option>
<?PHP } ?>
</SELECT>
</form>
<iframe name="iframe" src="<?PHP echo $epinum; ?>" height="388" width="640" frameborder="1" allowfullscreen></iframe>
最佳答案
只需将 $_POST['options'] 与 $image 进行比较，然后将“selected”回显到选项标记，如下所示:
<?PHP
if(isset($_POST['options'])){
$epinum = $_POST['options'];
}
?>
<form action="" method="post">
<SELECT class='listofepisodes' NAME='options' onchange='this.form.submit()' size='1200'>
<?PHP
$options=mysql_query("SELECT * FROM table");
while($option=mysql_fetch_array($options)) {
$image=$option['link'];
$number=$option['number'];
?>
<option value="<?PHP echo $image; ?>" <?php if(isset($_POST['options']) && $_POST['options']==$image) echo 'selected'; ?>>Option <?PHP echo $number; ?></option>
<?PHP } ?>
</SELECT>
</form>
<iframe name="iframe" src="<?PHP echo $epinum; ?>" height="388" width="640" frameborder="1" allowfullscreen></iframe>
关于javascript - POST 后选择 ="selected"？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30085196/