PHP http_response_code()；对标头（）；

Question

我根据本教程制作了一个联系表单：http://blog.teamtreehouse.com/create-ajax-contact-form

我在我的服务器上使用的是PHP5.3.10-1Ubuntu3.4版本，但我遇到了http_response_code()；的问题，这正是上面链接中的示例教程所使用的。我读过http_response_code()；仅适用于PHP5.4。因此，我转而使用header()；。

我的表单工作得很好，提交时显示成功消息，而不是使用http_response_code()；时出现错误，但我的PHP不是那么好，我想知道我所做的是可以接受的，还是应该换一种方式？如果是，请更正我的代码。

下面是我的mailer.php文件的内容，您可以看到我已经注释掉了http_response_code()；并且正在使用header()；。

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Get the form fields and remove whitespace.
    $name = strip_tags(trim($_POST["name"]));
    $name = str_replace(array("\r","\n"),array(" "," "),$name);
    $email = filter_var(trim($_POST["email"]), FILTER_SANITIZE_EMAIL);
    $phone = trim($_POST["phone"]);
    $company = trim($_POST["company"]);
    $minbudget = trim($_POST["minbudget"]);
    $maxbudget = trim($_POST["maxbudget"]);
    $message = trim($_POST["message"]);
    $deadline = trim($_POST["deadline"]);
    $referred = trim($_POST["referred"]);

    // Check that data was sent to the mailer.
    if ( empty($name) OR empty($phone) OR empty($message) OR !filter_var($email, FILTER_VALIDATE_EMAIL)) {
        // Set a 400 (bad request) response code and exit.
        //http_response_code(400);
        header("HTTP/1.1 400 Bad Request");
        echo "Error (400). That's not good, refresh and try again otherwise please email me and let me know you are having trouble submitting this form.";
        exit;
    }

    // Set the recipient email address.
    // FIXME: Update this to your desired email address.
    $recipient = "[e-mail]";

    // Set the email subject.
    $subject = "Website enquiry from $name";

    // Build the email content.
    $email_content = "Name: $name\n";
    $email_content .= "Email: $email\n\n";
    $email_content .= "Phone: $phone\n";
    $email_content .= "Company: $company\n\n";

    $email_content .= "Budget: $minbudget $maxbudget\n";
    $email_content .= "Deadline: $deadline\n";
    //$email_content .= "Max Budget: $maxbudget\n";

    $email_content .= "\n$message\n\n";        

    $email_content .= "Referred: $referred\n";

    // Build the email headers.
    $email_headers = "From: $name <$email>";

    // Send the email.
    if (mail($recipient, $subject, $email_content, $email_headers)) {
        // Set a 200 (okay) response code.
        //http_response_code(200);
        header("HTTP/1.1 200 OK");
        echo "Thank You! I'll be in touch soon.";
    } else {
        // Set a 500 (internal server error) response code.
        //http_response_code(500);
        header("HTTP/1.0 500 Internal Server Error");
        echo "Error (500). That's not good, refresh and try again otherwise please email me and let me know you are having trouble submitting this form.";
    }

} else {
    // Not a POST request, set a 403 (forbidden) response code.
    //http_response_code(403);
    header("HTTP/1.1 403 Forbidden");
    echo "Error (403). That's not good, refresh and try again otherwise please email me and let me know you are having trouble submitting this form.";
}

Answer 1

我通过查看PHP源代码来确定具体发生了什么，就我自己的类似问题回答了这个问题。

这两种方法在功能上基本上是等价的。http_response_code基本上是编写http状态头的一种简写方式，附加的好处是PHP将通过将您的响应代码与它在php-src/main/http_status_codes.h中维护的枚举中的一个值进行匹配，从而得出一个合适的原因短语来提供。

请注意，这意味着您的响应代码必须与PHP知道的响应代码匹配。您不能使用此方法创建自己的响应代码，但是可以使用header方法。还请注意，http_response_code仅在PHP 5.4.0及更高版本中可用。

简而言之-http_response_code和header之间用于设置响应代码的区别：

>

使用http_response_code将使PHP匹配并应用硬编码到PHP源代码中的原因短语列表中的原因短语。

由于上面的第1点，如果使用http_response_code，则必须设置PHP知道的代码。您不能设置自己的自定义代码，但是，如果使用header函数，您可以设置自定义代码（和原因短语）。