将下面的代码放入一个html文件，比如index.html
<form method=”post” action=”contact.php”>
Email: <input name=”email” type=”text”><br>
Message:<br>
<textarea name=”message” rows=”15″ cols=”40″></textarea><br>
<input type=”submit”>
</form>
然后新建一个php文件，名字为contact.php，内容为以下代码（将其中的you@yoursite.com改为自己的email）：
<?php
$to = “you@yoursite.com”;
$subject = “Contact Us”;
$email = $_REQUEST[’email’] ;
$message = $_REQUEST[‘message’] ;
$headers = “From: $email”;
$sent = mail($to, $subject, $message, $headers) ;
if($sent)
{print “Your mail was sent successfully”; }
else
{print “We encountered an error sending your mail”; }
?>
将以上两个文件上传到支持php的网站空间即可在线发邮件。
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稍微复杂一点的一个PHP在线发邮件例子如下：
html文件：
<html><body><font face=Arial size=2>
<form method=”post” action=”contact.php”>
<table bgcolor=#ffffcc align=center>
<tr><td colspan=2><strong>Contact us using this form:</strong></td></tr>
<tr><td>Department:</td><td><select name=”sendto”> <option value=”info@mycompany.com”>General</option> <option value=”support@mycompany.com”>Support</option> <option value=”sales@mycompany.com”>Sales</option> </select></td></tr>
<tr><td><font color=red>*</font> Name:</td><td><input size=25 name=”Name”></td></tr>
<tr><td><font color=red>*</font> Email:</td><td><input size=25 name=”Email”></td></tr>
<tr><td>Company:</td><td><input size=25 name=”Company”></td></tr>
<tr><td>Phone:</td><td><input size=25 name=”Phone”></td></tr>
<tr><td>Subscribe to<br> mailing list:</td><td><input type=”radio” name=”list” value=”No”> No Thanks<br> <input type=”radio” name=”list” value=”Yes” checked> Yes, keep me informed<br></td></tr>
<tr><td colspan=2>Message:</td></tr>
<tr><td colspan=2 align=center><textarea name=”Message” rows=5 cols=35></textarea></td></tr>
<tr><td colspan=2 align=center><input type=submit name=”send” value=”Submit”></td></tr>
<tr><td colspan=2 align=center><small>A <font color=red>*</font> indicates a field is required</small></td></tr>
</table>
</form>
</body>
</html>
php文件（contact.php）：
<?php
$to = $_REQUEST[‘sendto’] ;
$from = $_REQUEST[‘Email’] ;
$name = $_REQUEST[‘Name’] ;
$headers = “From: $from”;
$subject = “Web Contact Data”;
$fields = array();
$fields{“Name”} = “Name”;
$fields{“Company”} = “Company”;
$fields{“Email”} = “Email”;
$fields{“Phone”} = “Phone”;
$fields{“list”} = “Mailing List”;
$fields{“Message”} = “Message”;
$body = “We have received the following information:nn”; foreach($fields as $a => $b){ $body .= sprintf(“%20s: %sn”,$b,$_REQUEST[$a]); }
$headers2 = “From: noreply@YourCompany.com”;
$subject2 = “Thank you for contacting us”;
$autoreply = “Thank you for contacting us. Somebody will get back to you as soon as possible, usualy within 48 hours. If you have any more questions, please consult our website at www.oursite.com”;
if($from == ”) {print “You have not entered an email, please go back and try again”;}
else {
if($name == ”) {print “You have not entered a name, please go back and try again”;}
else {
$send = mail($to, $subject, $body, $headers);
$send2 = mail($from, $subject2, $autoreply, $headers2);
if($send)
{header( “Location: http://www.YourDomain.com/thankyou.html” );}
else
{print “We encountered an error sending your mail, please notify webmaster@YourCompany.com”; }
}
}
?>