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我有一个邮件提交脚本，它在开发环境中都按预期工作，但有一个例外。我从以实时环境与开发环境为条件的 mail() 测试中得到相互矛盾的结果。

在我的开发环境中，它会在成功时重定向到 $ThanksURL。在实时服务器上，即使通过邮件成功，脚本也会继续执行 else 语句并重定向回表单页面。

这一直让我发疯，所以任何关于为什么的想法都会受到欢迎。

问题片段：

$ok = @mail($to, $subject, $message, $headers, $returnpath);
            if($ok){ header("Location: $ThanksURL");
        exit;
}else{ $_SESSION['error'] .= " There has been a problems submitting your details. <br />";
                header("Location: $form");
                exit;   
        }// end if ok

完整的脚本：

<?php 
session_start();
$form = 'index.php';
$_SESSION['error'] = "The following errors have occured: ";

if(isset($_POST['submitted'])) {

    // email fields: to, from, subject, and so on
    // Here 
$from = "Form Feedback <******@gmail.com>";
    $to = "******@gmail.com";
    $subject = "Competition";
    $ThanksURL =  "thankyou.html"; 
    $headers = "From: $from";
    $returnpath = "-f" . $from;
    $attachment = 0; // is there an attachement
    //form fields
    $emailAddress = stripslashes($_POST['email']);
    $phone = stripslashes($_POST['phone']);
    $comments = stripslashes($_POST['comments']);
    //basic message info        
    $message = "Info submitted:\n\nEmail address: " .$emailAddress ."\n\nPhone number: " .$phone."\n\nComments:\n ".$comments. "\n\n";

    if($_FILES['attachment']['error'] == 4) {
         $message .="No attachement included";
        }else{
    // test file type and size for submission
    $allowedExts = array("doc", "docx", "pdf", "txt");
    $extension = end(explode(".", $_FILES['attachment']["name"]));

    if ((($_FILES['attachment']["type"] == "application/msword")
    || ($_FILES['attachment']["type"] == "application/vnd.openxmlformats-officedocument.wordprocessingml.document")//docx mime
    || ($_FILES['attachment']["type"] == "application/pdf")
    || ($_FILES['attachment']["type"] == "application/plain")
    || ($_FILES['attachment']["type"] == "text/plain"))
    && ($_FILES['attachment']["size"] < 2097152 )
    && in_array($extension, $allowedExts)){
        // boundary
            $semi_rand = md5(time());
            $mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";

            // headers for attachment
            $headers .= "\nMIME-Version: 1.0\n" . "Content-Type: multipart/mixed;\n" . " boundary=\"{$mime_boundary}\"";

            // multipart boundary
            $message = "--{$mime_boundary}\n" . "Content-Type: text/plain; charset=\"iso-8859-1\"\n"."Content-Transfer-Encoding: 7bit\n\n" . $message . "\n\n";

                    // prepare the files uplaod
              $message .= "--{$mime_boundary}\n";
              $fp     = @fopen($_FILES['attachment']['tmp_name'],"rb");
              $data   = @fread($fp,filesize($_FILES['attachment']['tmp_name']));
              @fclose($fp);
              $data = chunk_split(base64_encode($data));

             $message .= "Content-Type: application/octet-stream; name=\"".$_FILES['attachment']['name']."\"\n"."Content-Description: ".$_FILES['attachment']['name']."\n" ."Content-Disposition: attachment;\n" . " filename=\"".$_FILES['attachment']['name']."\";size=".$_FILES['attachment']['size'].";\n"."Content-Transfer-Encoding: base64\n\n" . $data . "\n\n";

$message .= "--{$mime_boundary}--";
        }else{
            $_SESSION['error'] .= "Error: " . $_FILES["attachment"]["name"] . " is not a doc, docx, pdf or txt file or is larger than 2mb. Please resubmit <br />";
            header("Location: $form");
             exit;
             }
        }//file conditional 
     //prepare mail
    $ok = @mail($to, $subject, $message, $headers, $returnpath);
            if($ok){
                 header("Location: $ThanksURL");
                exit;
             }else{
                 $_SESSION['error'] .= " There has been a problems submitting your details. <br />";
                header("Location: $form");
                exit;   
        }// end if ok
    }// end sub

?>
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1 回答 1

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很抱歉这么说，但是 php 邮件可以在成功时返回其他东西，而不是 true 或 false，就像php 手册评论中提到的那样。此外，已知在某些情况下也会返回 false 成功。

PHP mail() 从许多不同角度来看都是一个笨拙的函数，我个人建议不要在生产系统中使用它。有很多替代品，例如swift mailer、PHP mailer、Zend_Mail等。

但是，如果您想使用它，您绝对应该记录操作，在这种情况下，返回值，而不是使用 @ 来隐藏您的返回值。

总而言之，在这种情况下 mail() 返回一个空字符串，而不是 true 或 false。

于 2012-10-08T19:23:02.233 回答