Question

我有一个PHP页面，我在本地开发并且工作正常。将它上传到服务器后，我现在只得到一个空白的白色屏幕？它是完全相同的代码，在本地工作正常但不远程。我已尝试设置错误报告，但仍然没有给我任何错误，只是一个空白的白色屏幕。

编辑----------代码：

    $firstname = $phone = $email = $picture = $sqlcon = "";
    $firstnameErr = $phoneErr = $emailErr = $pictureErr = $sqlErr = $filterErr = "";
    $statusmsg = "";
    $newpicture = $registered = "false";

    if ($_SERVER["REQUEST_METHOD"] == "POST") {

        // If the user has not entered a firstname and has not entered details previously
        if ((empty($_POST["firstname"])) && empty($_POST["hfirst"])) {

            $firstnameErr = "Firstname is required for submission";
        }
        else {

            if (!empty($_POST["firstname"])) {

                $firstname = $_POST["firstname"];
            }
            else {

                $firstname = $_POST["hfirst"];
            }

            if (!preg_match("/^[a-zA-Z ]*$/", $firstname)) { 

                $firstnameErr="Please ensure you have entered only characters for your first name";
            }
        }

        // If the user has not entered a phone number and has not entered details previously
        if ((empty($_POST["phone"])) && (empty($_POST["hphone"]))) {

            $phoneErr = "Please ensure you have entered a phone number"; 
        }
        else {

            if (!empty($_POST["phone"])) {

                $phone = $_POST["phone"];
            }
            else {

                $phone = $_POST["hphone"];
            }

            if (!is_numeric($phone)) {

                $phoneErr = "Please ensure you have entered a valid phone number";
            }
        }

        if ((empty($_POST["email"])) && (empty($_POST["hemail"]))) {

            $emailErr = "Please ensure you have entered your email address";
        }
        else {

            if (!empty($_POST["email"])) {

                $email = $_POST["email"];
            }
            else {

                $email = $_POST["hemail"];
            }

            if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/", $email)) {

                $emailErr = "Please ensure you have entered a valid email address";
            }
        }

        if ((empty($_FILES["file"]["name"])) && (empty($_POST["hfile"]))) {

            $pictureErr = "Please ensure you have selected a picture to upload";
        }
        else {

            if (!empty($_FILES["file"]["name"])) {

                if ($_FILES["file"]["size"] > 1048576) {

                        $pictureErr = "The maximum size for a picture is 1mb";
                }
                else {

                    // Ensure the user has selected a file of accepted type
                    $temp = explode(".", $_FILES["file"]["name"]);
                    $ext = end($temp);
                    $allowedExt = array ("gif", "JPEG", "jpg", "png", "JPG");

                    if (!in_array($ext, $allowedExt)) {

                        $pictureErr = "Please ensure you have uploaded an image file";                              

                    }
                }

                $newpicture = "true";
                $picture = $_FILES["file"]["name"];

            }
            else {

                $picture = $_POST["hpicture"];
            }
        }

        $sqlcon = mysqli_connect("localhost", "USER", "PASS", "personneldb");

        if (mysqli_connect_errno()) {

            $sqlErr = "Could not connect to database";
            mysqli_close($sqlcon);
        }

        if ($newpicture == "true") {

            if (!move_uploaded_file($_FILES["file"]["tmp_name"], "./upload/".$_FILES["file"]["name"])) {

                $pictureErr = "File could not be uploaded";
            }
        }

        if ((empty($firstnameErr)) && (empty($emailErr)) && (empty($phoneErr)) && (empty($pictureErr == "")) && (empty($sqlErr == ""))) {

            mysqli_query($sqlcon, "INSERT INTO test2Details(Firstname, Phone, Email, ImageName)
            VALUES ('$firstname', '$phone', '$email', '$picture')");

            // Display status message
            $statusmsg = "Success! Your details and picture have been uploaded and stored"; 


        }

        if ((!empty($firstname)) && (!empty($phone)) && (!empty($email)) && (!empty($picture))) {

            $registered = "true";
        }
        else {

            $registered = "false";
        }


    }

Answer 1

这样可以显示服务器中的错误，但请记住，不建议在生产中使用它而不是在PHP文件中，这些配置必须在php.ini中设置

ini_set('display_startup_errors',1); 
ini_set('display_errors',1);
error_reporting(-1);

有关详细信息，请参阅：

Answer 2

要检查的事项：

$_SERVER["REQUEST_METHOD"]：如果您正在使用其他服务器，则可能是问题，请检查此密钥是否存在，否则，请使用isset($_POST)
数据库连接？，可能是用户或传递的一些错误？
检查PHP错误日志，如果您不知道存储的位置，请执行此操作：php -i | grep error_log，应返回错误日志的路径
检查服务器错误日志，日志通常在/var/log/SERVER（SERVER可能是lighttpd，apache，nginx，httpd，......取决于它）

或者，您可以使用ini_set指令并激活error_reporting

Answer 3

管理修复我的问题，抓住服务器上的错误日志，发现我得到一个解析错误！

Answer 4

表示处理已完成。一切都很好，代码没有任何错误结束。

您应该喜欢 echo 'You have successfully created'。

PHP空白页面，没有错误

4 个答案: