我知道以前有人问过这个问题,但我对此有一个未解决的问题。
如何获得由服务器端脚本生成的默认值?
例如:
Weekday: <select name="weekday" class="right" value="<% =rs("Weekday")%>">
<option value="Monday">Monday</option>
<option value="Tuesday">Tuesday</option>
<option value="Wednesday">Wednesday</option>
<option value="Thursday">Thursday</option>
<option value="Friday">Friday</option>
<option value="Saturday">Saturday</option>
<option value="Sunday">Sunday</option>
</select>
我知道您可以使用正则元素来获得选定的属性,但我在这里陷入了循环。
有什么想法吗?
您希望HTML最终看起来像这样-注意"Friday"
之后的selected
默认选择星期五:
<select name="weekday" class="right">
<option value="Monday">Monday</option>
<option value="Tuesday">Tuesday</option>
<option value="Wednesday">Wednesday</option>
<option value="Thursday">Thursday</option>
<option value="Friday" selected>Friday</option>
<option value="Saturday">Saturday</option>
<option value="Sunday">Sunday</option>
</select>
一个快速而肮脏的PHP示例可以这样使用,其中每个选项都被要求验证它是否是当前日期的正确选项。如果是,则显示selected
,否则不显示任何内容。你可以在上试用此代码http://phpfiddle.org/lite.
<html>
<body>
<select name="weekday" class="right">
<option value="Monday" <?php echo setSelected('Monday'); ?>>Monday</option>
<option value="Tuesday" <?php echo setSelected('Tuesday'); ?>>Tuesday</option>
<option value="Wednesday" <?php echo setSelected('Wednesday'); ?>>Wednesday</option>
<option value="Thursday" <?php echo setSelected('Thursday'); ?>>Thursday</option>
<option value="Friday" <?php echo setSelected('Friday'); ?>>Friday</option>
<option value="Saturday" <?php echo setSelected('Saturday'); ?>>Saturday</option>
<option value="Sunday" <?php echo setSelected('Sunday'); ?>>Sunday</option>
</select>
</body>
</html>
<?php
function setSelected($day)
{
date_default_timezone_set('America/Chicago');
return strtolower($day) === strtolower(date('l')) ? ' selected' : '';
}
?>
我更倾向于在服务器端本身创建select/选项。同样,快速而肮脏的PHP示例:
<html>
<body>
<select name="weekday" class="right">
<?php
date_default_timezone_set('America/Chicago');
$dayOfWeek = strtolower(date('l'));
$days = array('Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday');
foreach ($days as $day)
{
echo sprintf("<option value="%s" %s>%s</option>n",
$day,
$dayOfWeek == strtolower($day) ? 'selected' : '',
$day
);
}
?>
</select>
</body>
</html>