一旦提交选择的选项,数据不会被存储。只想知道如果验证失败如何回发数据
以下行并不适合我。
<select id="numbers" name="numbers" value="<?php echo (isset($_POST['numbers'])) ? $_POST['numbers'] : " "; ?>"/>
如果有人可以帮我一把?
非常感谢,这是我的代码
<?php
if(isset($_POST['numbers']) &&($_POST['fruits']) && $_POST['numbers'] != "null" && $_POST['fruits'] !== "null")
{
echo "Thank you!";
} elseif (isset($_POST['numbers']) && $_POST['numbers'] = "null") {
echo "you forgot to choose a number";
}
elseif(isset($_POST['fruits']) && $_POST['fruits'] = "null")
{
echo "you forgot to choose fruit name";
}
?>
<form id="form" name="form" method="post" action="">
<label for="expiry">Select</label>
<select id="numbers" name="numbers" value="<?php echo (isset($_POST['numbers'])) ? $_POST['numbers'] : " "; ?>"/>
<option value="null" selected="selected">-</option>
<option value="01">01</option>
<option value="02">02</option>
<option value="03">03</option>
</select>
<select id="fruits" name="fruits" value="<?php echo (isset($_POST['fruits']))? $_POST['fruits'] : ''; ?>"/>
<option value="null" selected="selected">-</option>
<option value="Apple">Apple</option>
<option value="Banana">Banana</option>
<option value="Pear">Pear</option>
</select>
<input type="submit" value="Send" />
</form>
解决了,也许不是最好的方法,但至少得到了排序:
<?php
$item = null; #
$itemyear = null;
if(isset($_POST['numbers'])){
$item = $_POST['numbers'];
}
if(isset($_POST['fruits'])){
$itemyear = $_POST['fruits'];
}
if(isset($item) && isset($itemyear) && $item != "null" && $itemyear !== "null")
{
echo "Thank you!";
} elseif ($item == "null") {
echo "you forgot to choose a number";
}
elseif($itemyear == "null")
{
echo "you forgot to choose fruit name";
}
?>
<form id="form" name="form" method="post" action="">
<label for="expiry">Select</label>
<select id="numbers" name="numbers" />
<option value="null" selected="selected">-</option>
<option value="01" <?php if($item == '01'): echo "selected='selected'"; endif; ?>>01</option>
<option value="02" <?php if($item == '02'): echo "selected='selected'"; endif; ?>>02</option>
<option value="03" <?php if($item == '03'): echo "selected='selected'"; endif; ?>>03</option>
</select>
<select id="fruits" name="fruits" />
<option value="null" selected="selected">-</option>
<option value="Apple"<?php if($itemyear == 'Apple'): echo "selected='selected'"; endif; ?> >Apple</option>
<option value="Banana"<?php if($itemyear == 'Banana'): echo "selected='selected'"; endif; ?>>Banana</option>
<option value="Pear"<?php if($itemyear == 'Pear'): echo "selected='selected'"; endif; ?>>Pear</option>
</select>
<input type="submit" value="Send" />
</form>
<?php
echo $item ."-". $itemyear;
?>