发送图片并提交PhP

Question

因此，我有一个非常基本的联系表，我想上传一张应随联系表发送的图片。该联系表发送到我的电子邮件。图片应该能够在网站上通过手机和PC上传。

index.php

<form name="contactform" method="post" action="send_form_email.php">
<table width="450px">
<tr>
<td valign="top">
<label for="first_name">First Name *</label>
</td>
<td valign="top">
<input  type="text" name="first_name" maxlength="50" size="30">
</td>
</tr>
<tr>
<td valign="top">
<label for="last_name">Last Name *</label>
</td>
<td valign="top">
<input  type="text" name="last_name" maxlength="50" size="30">
</td>
</tr>
<tr>
<td valign="top">
<label for="email">Email Address *</label>
</td>
<td valign="top">
<input  type="text" name="email" maxlength="80" size="30">
</td>
</tr>
<tr>
<td valign="top">
<label for="telephone">Telephone Number</label>
</td>
<td valign="top">
<input  type="text" name="telephone" maxlength="30" size="30">
</td>
 </tr>
 <td valign="top">
 <label for="telephone">File</label>
 </td>
 <td valign="top">
 <input  type="file" name="file">
 </td>
 </tr>
<tr>
<td valign="top">
 <label for="comments">Comments *</label>
</td>
<td valign="top">
 <textarea  name="comments" maxlength="1000" cols="25" rows="6"></textarea>
</td>
</tr>
<tr>
<td colspan="2" style="text-align:center">
 <input type="submit" value="Submit">
</td>
</tr>
 </table>
 </form>

send_form_email.php

  <?php
  if(isset($_POST['email'])) {

 // EDIT THE 2 LINES BELOW AS REQUIRED
 $email_to = "kuypersruan@gmail.com";
 $email_subject = "Your email subject line";

 function died($error) {
    // your error code can go here
    echo "We are very sorry, but there were error(s) found with the form you 
 submitted. ";
    echo "These errors appear below.<br /><br />";
    echo $error."<br /><br />";
    echo "Please go back and fix these errors.<br /><br />";
    die();
 }


// validation expected data exists
if(!isset($_POST['first_name']) ||
    !isset($_POST['last_name']) ||
    !isset($_POST['email']) ||
            !isset($_POST['file']) ||
    !isset($_POST['telephone']) ||
    !isset($_POST['comments'])) {
    died('We are sorry, but there appears to be a problem with the form you 
 submitted.');
 }



$first_name = $_POST['first_name']; // required
    $file = $_POST['file']; // required
$last_name = $_POST['last_name']; // required
$email_from = $_POST['email']; // required
$telephone = $_POST['telephone']; // not required
$comments = $_POST['comments']; // required

$error_message = "";
$email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/';

if(!preg_match($email_exp,$email_from)) {
$error_message .= 'The Email Address you entered does not appear to be 
valid.<br />';
}

$string_exp = "/^[A-Za-z .'-]+$/";

if(!preg_match($string_exp,$first_name)) {
$error_message .= 'The First Name you entered does not appear to be valid. 
<br />';
}

if(!preg_match($string_exp,$last_name)) {
$error_message .= 'The Last Name you entered does not appear to be valid.<br 
/>';
}
 if(!preg_match($string_exp,$file)) {
 $error_message .= 'The file Name you entered does not appear to be valid. <br 
 />';
 }

 if(strlen($comments) < 2) {
 $error_message .= 'The Comments you entered do not appear to be valid.<br 
 />';
  }

 if(strlen($error_message) > 0) {
   died($error_message);
 }

  $email_message = "Form details below.\n\n";


  function clean_string($string) {
   $bad = array("content-type","bcc:","to:","cc:","href");
   return str_replace($bad,"",$string);
  }



 $email_message .= "First Name: ".clean_string($first_name)."\n";
 $email_message .= "Last Name: ".clean_string($last_name)."\n";
 $email_message .= "Email: ".clean_string($email_from)."\n";
 $email_message .= "Telephone: ".clean_string($telephone)."\n";
 $email_message .= "Comments: ".clean_string($comments)."\n";
     $email_message .= "File: ".clean_string($file)."\n";

 // create email headers
 $headers = 'From: '.$email_from."\r\n".
 'Reply-To: '.$email_from."\r\n" .
 'X-Mailer: PHP/' . phpversion();
 @mail($email_to, $email_subject, $email_message, $headers);
 ?>

 <!-- include your own success html here -->

 Thank you for contacting us. We will be in touch with you very soon.

 <?php

 }
 ?>

当前信息已提交，但是添加文件上传会导致错误