PHP 表单上传和电子邮件答案

【问题标题】：Php form upload and emailPHP 表单上传和电子邮件
【发布时间】：2014-08-04 07:26:03
【问题描述】：

我有以下代码，理想情况下，希望用户在提交表单时上传文件（图像/视频），但这不是强制性的。

<?php

$to = "someone@example.com";
$fromEmail = $_POST['fieldFormEmail']; 
$fromName = $_POST['fieldFormName']; 
$subject = $_POST['fieldSubject']; 
$message = $_POST['fieldDescription'];

/* GET File Variables */ 
$tmpName = $_FILES['attachment']['tmp_name']; 
$fileType = $_FILES['attachment']['type']; 
$fileName = $_FILES['attachment']['name']; 

/* Start of headers */ 
$headers = "From: $fromName"; 

if (file($tmpName)) { 
  /* Reading file ('rb' = read binary)  */
  $file = fopen($tmpName,'rb'); 
  $data = fread($file,filesize($tmpName)); 
  fclose($file); 

  /* a boundary string */
  $randomVal = md5(time()); 
  $mimeBoundary = "==Multipart_Boundary_x{$randomVal}x"; 

  /* Header for File Attachment */
  $headers .= "\nMIME-Version: 1.0\n"; 
  $headers .= "Content-Type: multipart/mixed;\n" ;
  $headers .= " boundary=\"{$mimeBoundary}\""; 

  /* Multipart Boundary above message */
  $message = "This is a multi-part message in MIME format.\n\n" . 
  "--{$mimeBoundary}\n" . 
  "Content-Type: text/plain; charset=\"iso-8859-1\"\n" . 
  "Content-Transfer-Encoding: 7bit\n\n" . 
  $message . "\n\n"; 

  /* Encoding file data */
  $data = chunk_split(base64_encode($data)); 

  /* Adding attchment-file to message*/
  $message .= "--{$mimeBoundary}\n" . 
  "Content-Type: {$fileType};\n" . 
  " name=\"{$fileName}\"\n" . 
  "Content-Transfer-Encoding: base64\n\n" . 
  $data . "\n\n" . 
  "--{$mimeBoundary}--\n"; 
} 

$flgchk = mail ("$to", "$subject", "$message", "$headers"); 

if($flgchk){
  echo "A email has been sent to: $to";
 }
else{
  echo "Error in Email sending";
}
?>

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Email Attachment Without Upload - Excellent Web World</title>
<style>
body{ font-family:Arial, Helvetica, sans-serif; font-size:13px;}
th{ background:#999999; text-align:right; vertical-align:top;}
input{ width:181px;}
</style>
</head>
<body>
    <form action="Contact.php" method="post" name="mainform" enctype="multipart/form-data">
    <table width="500" border="0" cellpadding="5" cellspacing="5">
       <tr>
        <th>Your Name</th>
        <td><input name="fieldFormName" type="text"></td>
    </tr>
    <tr>
    <tr>
        <th>Your Email</th>
        <td><input name="fieldFormEmail" type="text"></td>
    </tr>

    <tr>
        <th>Subject</th>
        <td><input name="fieldSubject" type="text" id="fieldSubject"></td>
    </tr>
    <tr>
        <th>Comments</th>
        <td><textarea name="fieldDescription" cols="20" rows="4" id="fieldDescription"></textarea></td>
    </tr>
    <tr>
      <th>Attach Your File</th>
      <td><input name="attachment" type="file"></td>
    </tr>
    <tr>
        <td colspan="2" style="text-align:center;"><input type="submit" name="Submit" value="Send"><input type="reset" name="Reset" value="Reset"></td>
    </tr>
    </table>
    </form>
</body>
<html>

我面临的问题是，

它在页面加载时运行，并且
如果文件尚未上传，则会引发警告。

我尝试将文件上传部分置于“如果文件名存在”条件下，但电子邮件没有发送附件请帮忙。此文件名为 Contact.php

【问题讨论】：

标签： php html forms

【解决方案1】：

它在页面加载时运行

附上邮件发送功能

if(isset($_POST['Submit']) && ($_POST['Submit']) == 'Send' )
{
  /* process only when submit button whose name='Submit' 
     and value= 'Send' is pressed
     entire PHP code */
}

如果文件尚未上传，则会引发警告。

在 PHP 中附加之前检查

if((empty($_POST['attachment'])) || (empty($_FILES['attachment']))){
    //file is not attached, show error
}else{
 //file is attached, process it and send via mail
}

【讨论】：