我是php的新手，一直试图弄清楚如何正确验证电子邮件地址，并且数据已经输入到文本框中。我无法真正找到我需要的东西，并尝试按照php.net上的示例将我发送到一个圆圈。任何帮助将不胜感激！另外，我甚至用这种形式朝着正确的方向前进？该表单有效，我收到一封电子邮件，格式化为我希望在下拉框中的任一电子邮件地址。
-UPDATE - 我重写了一些我的脚本......有人可以检查一下，我现在遇到了更多问题。即使表格中没有输入任何内容，它也会发送一封电子邮件，即使您这样做也会发送任何内容。示例“email”test @ example正在通过。
<?php
//Sainitize function
function sanitizeString($value){
$value = strip_tags($value);
$value = trim($value);
$value = escapeshellcmd($value);
$value = htmlentities($value);
return $value;
}
$send = $_POST[send];
//Email validation - does not work by the way
if (filter_var($from, FILTER_VALIDATE_EMAIL)) {
$email_error = true;
$error_message[] = "Please use a valid email format: name@domain.com";
}
if($send == 1){$email_sent = true; $step_1 = "complete";}
else{$email_sent = false; $step_1 = "complete";}
if($email_sent === true) {
$from = sanitizeString($_POST['from']);
$to = sanitizeString($_POST['to']);
$name = sanitizeString($_POST['name']);
$title = sanitizeString($_POST['title']);
$company = sanitizeString($_POST['company']);
$phone = sanitizeString($_POST['phone']);
$subject = sanitizeString($_POST['subject']);
$message = sanitizeString($_POST['message']);
// define variables and initialize with empty values
$nameErr = $addressErr = $emailErr = $messageErr = $phoneErr = "";
$name = $address = $email = $message = $phone = "";
if ($_SERVER["REQUEST_METHOD"] == "POST") {
if (empty($_POST["name"])) {
$nameErr = "Please enter your name.";
}
else {
$name = $_POST["name"];
}
if (empty($_POST["email"])) {
$emailErr = "Please enter your email.";
}
else {
$email = $_POST["email"];
}
if (empty($_POST["phone"])) {
$phoneErr = "Please enter a phone number.";
}
else {
$phone = $_POST["phone"];
}
if (empty($_POST["message"])) {
$messageErr = "Cannot leave message box blank.";
}
else {
$message = $_POST["message"];
}
}
//select the correct to address
switch ($to) {
case "1":
$to = "contact1@example.com";
break;
case "2":
$to = "contact2@example.com";
break;
default:
$to = "contact1@example.com";
break;}
if($message_error !== true && $email_error !== true){
$email_headers = "From:".$from."\nMIME-Version: 1.0 \nContent-type: text/html; charset=iso-8859-1";
$message_send = "<h3>".$name."<br>".$title."<br>".$company."<br>".$phone."<br>".$from."</h3><hr><h4>".$subject."</h4>".$message;
if (mail($to, $subject, $message_send, $email_headers)) {$error_message = "Thank you, your email is on the way!";}
else {$error_message = "There seems to be a problem!";}}
}
?>
<body>
<form action="<?php ($_SERVER["PHP_SELF"]);?>" method="post">
<table style="border-collapse:collapse; border-spacing:0" >
<tr>
<td>Name:</td>
<td><input name="name" placeholder="Name*" type="text" class="text"/>
<span class="error"><?php echo $nameErr;?></span></td>
</tr>
<tr>
<td>Title:</td>
<td><input type="text" placeholder="Title" name="title" size="50"/></td>
</tr>
<tr>
<td>Company:</td>
<td><input type="text" placeholder="Company" name="company" size="50" /></td>
</tr>
<tr>
<td>Phone:</td>
<td>
<input name="phone" placeholder="Phone*" type="tel" size="10" maxlength="10" value="<?php echo htmlspecialchars($phone);?>"/>
<span class="style1">Example: 1234567890</span> <span class="error" style="color:#990000"><?php echo $phoneErr;?></span></td>
</tr>
<tr>
<td>Email:</td>
<td><input name="from" placeholder="Email*" type="email" class="text" value="<?php echo htmlspecialchars($email);?>">
<span class="error"><?php echo $emailErr;?></span></td>
</tr>
<tr>
<td>To:</td>
<td><select name="to" size="1">
<option value="1">Contact 1</option>
<option value="2">Contact 2</option>
</select></td>
</tr>
<tr>
<td>Subject:</td>
<td><input type="text" name="subject" placeholder="Subject" size="50" /></td>
</tr>
<tr>
<td valign="top">Detail:</td>
<td colspan="2"><textarea cols="50" rows="4" name="message" placeholder="Type your message here."></textarea></td>
</tr>
<tr>
<td colspan="2" style="text-align:center;"><input type="hidden" name="send" value="1" /><input type="submit" value="Send" name="email_1" /></td>
</tr>
</table >
</form>
答案 0 :(得分：0)
对于电子邮件验证，您可以使用filter_var函数和FILTER_VALIDATE_EMAIL过滤器属性。 Here是关于输入验证的好文章。从php手册中试试这个：
var_dump(filter_var('bob@example.com', FILTER_VALIDATE_EMAIL));
你可以简化你的代码，它有点乱。 switch电子邮件地址不是很好的做法。您可以像这样添加值：
<select name="to" size="1">
<option value="contact1@example.com">Contact1</option>
<option value="contact2@example.com">Contact2</option>
</select>
您还使用了已弃用的函数mysql_escape_string。 ltrim和rtrim可以替换为trim函数。
<强>更新
您的代码中仍然存在很多错误。你有错误报告吗？电子邮件切换绝对不是解决您问题的好方法。看看重构的代码，它应该适合你：
<?php
//Sainitize function
function sanitizeString($value)
{
$value = strip_tags($value);
$value = trim($value);
$value = escapeshellcmd($value);
$value = htmlentities($value);
return $value;
}
$errorMessage = array();
$receivers = array(
1 => 'contact1@example.com',
2 => 'contact2@example.com'
);
if(isset($_POST['form']))
{
$formData = $_POST['form'];
if (filter_var($formData['from'], FILTER_VALIDATE_EMAIL)) {
$from = sanitizeString($formData['from']);
}
else
{
$errorMessage[] = "Please use a valid email format: name@domain.com";
}
if(array_key_exists($formData['to'], $receivers))
{
$to = $receivers[$formData['to']];
}
else
{
$to = 'default@example.com';
}
if(strlen($formData['name']) > 0)
{
$name = sanitizeString($formData['name']);
}
else
{
$errorMessage[] = "Please enter your name.";
}
if(strlen($formData['title']) > 0)
{
$title = sanitizeString($formData['title']);
}
else
{
$title = '';
}
if(strlen($formData['company']) > 0)
{
$company = sanitizeString($formData['company']);
}
else
{
$company = '';
}
if(strlen($formData['phone']) > 0)
{
$phone = sanitizeString($formData['phone']);
}
else
{
$errorMessage[] = "Please enter a phone number.";
}
if(strlen($formData['subject']) > 0)
{
$subject = sanitizeString($formData['subject']);
}
else
{
$subject = '';
}
if(strlen($formData['message']) > 0)
{
$message = sanitizeString($formData['message']);
}
else
{
$errorMessage[] = 'Cannot leave message box blank.';
}
if (empty($errorMessage) && $formData['spam'] == 9)
{
$email_headers = "From:" . $from . "\nMIME-Version: 1.0 \nContent-type: text/html; charset=iso-8859-1";
$message_send = "<h3>" . $name . "<br>" . $title . "<br>" . $company . "<br>" . $phone . "<br>" . $from . "</h3><hr><h4>" . $subject . "</h4>" . $message;
if (mail($to, $subject, $message_send, $email_headers))
{
$errorMessage[] = 'Thank you, your email is on the way!';
}
else
{
$errorMessage[] = 'There seems to be a problem!';
}
}
}
?>
<body>
<?php if(!empty($errorMessage)): ?>
<div style="border: 2px solid red">
<ul>
<?php foreach ($errorMessage as $error): ?>
<li><?php echo $error; ?></li>
<?php endforeach; ?>
</ul>
</div>
<?php endif; ?>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
<table style="border-collapse:collapse; border-spacing:0">
<tr>
<td>Name:</td>
<td>
<input name="form[name]" placeholder="Name*" type="text" class="text" value="<?php echo isset($name) ? $name : ''; ?>"/>
</td>
</tr>
<tr>
<td>Title:</td>
<td>
<input type="text" placeholder="Title" name="form[title]" size="50" value="<?php echo isset($title) ? $title : ''; ?>"/>
</td>
</tr>
<tr>
<td>Company:</td>
<td>
<input type="text" placeholder="Company" name="form[company]" size="50" value="<?php echo isset($company) ? $company : ''; ?>"/>
</td>
</tr>
<tr>
<td>Phone:</td>
<td>
<input name="form[phone]" placeholder="Phone*" type="tel" size="10" maxlength="10" value="<?php echo isset($phone) ? $phone : ''; ?>"/>
<span class="style1">Example: 1234567890</span>
</td>
</tr>
<tr>
<td>Email:</td>
<td>
<input name="form[from]" placeholder="Email*" type="email" class="text" value="<?php echo isset($from) ? $from : ''; ?>">
</td>
</tr>
<tr>
<td>To:</td>
<td>
<select name="form[to]" size="1">
<option value="1">Contact 1</option>
<option value="2">Contact 2</option>
</select>
</td>
</tr>
<tr>
<td>Subject:</td>
<td>
<input type="text" name="form[subject]" placeholder="Subject" size="50" value="<?php echo isset($subject) ? $subject : ''; ?>"/>
</td>
</tr>
<tr>
<td valign="top">Detail:</td>
<td colspan="2">
<textarea cols="50" rows="4" name="form[message]" placeholder="Type your message here."><?php echo isset($message) ? $message : ''; ?></textarea>
</td>
</tr>
<tr>
<td></td>
<td>
3x3 = <input type="text" value="" name="form[spam]"/>
<input type="submit" value="Send" />
</td>
</tr>
</table>
</form>
答案 1 :(得分：0)
我在php.net上发现了这个..它有用吗？
if (filter_var($from, FILTER_VALIDATE_EMAIL)) {
$email_error = true;
$error_message[] = "Please use a valid email format: name@domain.com";
}
答案 2 :(得分：0)
Filter var确实有效。请尝试以下代码。
<?php
$emailError = array();
if(isset($_POST["send"])){
$from = $_POST["from"];
if (!filter_var($from, FILTER_VALIDATE_EMAIL)) {
$emailError[] = "Please use a valid email format: name@domain.com\n\r";
}
else {
echo $from . " is a valid email.\n\r";
}
if ($emailError){
foreach ($emailError as $key){
echo $key;
}
}
} else {
?>
<form action="<?php ($_SERVER["PHP_SELF"]);?>" method="post">
<table>
<tr>
<td>Email:</td>
<td>
<input name="from" placeholder="Email*" type="email" class="text" value="">
</td>
</tr>
</table>
<input type="submit" value="Send" name="send" />
</form>
<?php
}
?>