我有一个小表单,我正在使用php进行一些简单的错误检查,所有看起来都很好,但我注意到当用户提交表单时,在错误检查发生后,所有数据都从字段中删除。
这就是我所拥有的
<?php if($show=="true"):?>
<input name="fname" type="text" value="<?php if(isset($_POST['name']){echo $_POST['name';]})?>"><?php echo $errorname; ?>
<input name="email" type="text" value="<?php if(isset($_POST['name']){echo $_POST['name';]})?>"><?php echo $erroremail; ?>
<input type="submit" value="submit">
<?php else: ?>
<h2>Your Message was sent</h2>
<?php endif;?>
<?php
if(empty($_POST['name'])){
$show="true";
$errorname="please enter your name";
}
elseif(empty($_POST['email'])){
$show=true;
$erroremail="please end your email";
}else
$show=false;
//Send data as email;
?>
答案 0 :(得分:0)
如果您只想检查字段是否为空(这很奇怪),您可以使用上次提交的帖子值。之后,只需使用empty()
,如果确实存在错误,将它们放入数组(收集它们)并在提交后打印它们。考虑这个例子:
<?php
$errors = array();
if(isset($_POST['submit'])) {
$fname = trim($_POST['fname']);
$email = trim($_POST['email']);
if(empty($fname)) {
$errors['fname'] = 'please enter your name';
}
if(empty($email)) {
$errors['email'] = 'please enter your email';
}
}
?>
<form method="POST" action="index.php">
Name: <input type="text" name="fname" value="<?php echo isset($_POST['fname']) ? $_POST['fname'] : ''; ?>" /> <span style="color: red;"><?php echo isset($errors['fname']) ? $errors['fname'] : ''; ?></span><br/>
Email: <input type="text" name="email" value="<?php echo isset($_POST['email']) ? $_POST['email'] : ''; ?>" /> <span style="color: red;"><?php echo isset($errors['email']) ? $errors['email'] : ''; ?></span><br/>
<input type="submit" name="submit" value="Submit" />
</form>
<?php if(isset($_POST['submit']) && empty($errors)): ?>
<h2>Your Message was sent.</h2>
<?php endif; ?>