Php 正在尝试上载图像。但我会犯错误

我试图上传一个图像，但我得到了错误。这是到目前为止我的代码

<?php
    $servername = "localhost"; 
    $username = "root"; 
    $password = "";  
    $dbname = ""; //Taken out for stackoverflow question

    $conn = mysqli_connect($servername, $username, $password, $dbname);

    $dir = "ads/";
    $file = $dir . basename($_FILES['cf']['name']);
    $uploadSuccess = 1;
    $imageFileType = pathinfo($file, PATHINFO_EXTENSION);

    if (!$conn)
    {
        echo 'Could not connect';
    }
    else 
    {
        if (!empty($_FILES['cf'] && $_POST['category']))
        {
            $filesize = getimagesize($_FILES['cf']['tmp_name']);
            if ($filesize != false)
            {
                if (file_exists($file))
                {
                    echo 'File already exists';
                    $uploadSuccess = 0;
                }
                if ($_FILES['cf']['size'] > 500000)
                {
                    echo 'Cannot use that large of a file';
                    $uploadSuccess = 0;
                }
                if ($imageFileType != 'jpg' && $imageFileType != 'png' && $imageFileType != 'jpeg')
                {
                    echo 'Only jpg, png, and jpeg files are allowed';
                    $uploadSuccess = 0;
                }
                if ($uploadSuccess == 0)
                {
                    echo 'Sorry, your file was not uploaded';
                }
                else
                {
                    if (move_uploaded_file($_FILES['cf']['tmp_name'], $file))
                    {
                        echo 'The file: '.basename($_FILES['cf']['name'])." has been uploaded";
                    }
                    else 
                    {
                        echo 'Sorry, there was an error uploading your file';
                    }
                }
            }
            else 
            {
                $uploadSuccess = 0;
            }
        }
    }
?>

那代码不起作用。我已经做了两天了。首先尝试将其输入数据库。现在是一个目录。下面是localhost给我的错误

---

您应该检查“ads/”目录是否存在以及您的web服务器用户是否对其具有写入权限。

您应该检查“ads/”目录是否存在以及您的web服务器用户是否对其具有写入权限。

您需要检查 如果文件夹存在

php代码：

<?php
    $servername = "localhost";
    $username = "root";
    $password = "";
    $dbname = ""; //Taken out for stackoverflow question

    $conn = mysqli_connect($servername, $username, $password, $dbname);

    $rootPath = dirname(__FILE__);
    $dir = $rootPath. DIRECTORY_SEPARATOR ."ads";


    $file = 'ads'.DIRECTORY_SEPARATOR .basename($_FILES['cf']['name']);
    $fileNewName = $dir.DIRECTORY_SEPARATOR.$_SERVER['REQUEST_TIME_FLOAT'].'_'.rand(1,9999) .'_'. basename($_FILES['cf']['name']);
    $uploadSuccess = 1;
    $imageFileType = pathinfo($file, PATHINFO_EXTENSION);

    if (!$conn)
    {
        echo 'Could not connect';
    }
    else
    {
        if (!empty($_FILES['cf'] && $_POST['category']))
        {
            $filesize = getimagesize($_FILES['cf']['tmp_name']);
            if ($filesize != false)
            {
                if (file_exists($fileNewName))
                {
                    echo 'File already exists';
                    $uploadSuccess = 0;
                }
                if ($_FILES['cf']['size'] > 500000)
                {
                    echo 'Cannot use that large of a file';
                    $uploadSuccess = 0;
                }
                if ($imageFileType != 'jpg' && $imageFileType != 'png' && $imageFileType != 'jpeg')
                {
                    echo 'Only jpg, png, and jpeg files are allowed';
                    $uploadSuccess = 0;
                }
                if ($uploadSuccess == 0)
                {
                    echo 'Sorry, your file was not uploaded';
                }
                else
                {

                    if (!is_dir($dir)){

                        if (!mkdir($dir, 0777, true)) {
                            die('Sorry, failed to create folder'.$dir );
                        }
                    }

                    if (!is_writable($dir)) {
                        die( 'folder is not writeble'.dir);
                    }


                    if (move_uploaded_file($_FILES['cf']['tmp_name'], $fileNewName))
                    {
                        echo 'The file: '.basename($_FILES['cf']['name'])." has been uploaded";
                    }
                    else
                    {
                        echo 'Sorry, there was an error uploading your file';
                    }
                }
            }
            else
            {
                $uploadSuccess = 0;
            }
        }
    }

exit;
?>

您需要检查 如果文件夹存在

php代码：

<?php
    $servername = "localhost";
    $username = "root";
    $password = "";
    $dbname = ""; //Taken out for stackoverflow question

    $conn = mysqli_connect($servername, $username, $password, $dbname);

    $rootPath = dirname(__FILE__);
    $dir = $rootPath. DIRECTORY_SEPARATOR ."ads";


    $file = 'ads'.DIRECTORY_SEPARATOR .basename($_FILES['cf']['name']);
    $fileNewName = $dir.DIRECTORY_SEPARATOR.$_SERVER['REQUEST_TIME_FLOAT'].'_'.rand(1,9999) .'_'. basename($_FILES['cf']['name']);
    $uploadSuccess = 1;
    $imageFileType = pathinfo($file, PATHINFO_EXTENSION);

    if (!$conn)
    {
        echo 'Could not connect';
    }
    else
    {
        if (!empty($_FILES['cf'] && $_POST['category']))
        {
            $filesize = getimagesize($_FILES['cf']['tmp_name']);
            if ($filesize != false)
            {
                if (file_exists($fileNewName))
                {
                    echo 'File already exists';
                    $uploadSuccess = 0;
                }
                if ($_FILES['cf']['size'] > 500000)
                {
                    echo 'Cannot use that large of a file';
                    $uploadSuccess = 0;
                }
                if ($imageFileType != 'jpg' && $imageFileType != 'png' && $imageFileType != 'jpeg')
                {
                    echo 'Only jpg, png, and jpeg files are allowed';
                    $uploadSuccess = 0;
                }
                if ($uploadSuccess == 0)
                {
                    echo 'Sorry, your file was not uploaded';
                }
                else
                {

                    if (!is_dir($dir)){

                        if (!mkdir($dir, 0777, true)) {
                            die('Sorry, failed to create folder'.$dir );
                        }
                    }

                    if (!is_writable($dir)) {
                        die( 'folder is not writeble'.dir);
                    }


                    if (move_uploaded_file($_FILES['cf']['tmp_name'], $fileNewName))
                    {
                        echo 'The file: '.basename($_FILES['cf']['name'])." has been uploaded";
                    }
                    else
                    {
                        echo 'Sorry, there was an error uploading your file';
                    }
                }
            }
            else
            {
                $uploadSuccess = 0;
            }
        }
    }

exit;
?>

它已存在。至于写权限。。。它是只读的。我改变了，但它仍然不起作用。给出相同的错误。它不断重置回只读。它存在。至于写权限。。。它是只读的。我改变了，但它仍然不起作用。给出相同的错误。它不断重置为只读。图片已上载。现在我如何更改名称？很可能有些人会将他们的广告命名为相同的名称。那么，我如何输入一个不同于原始上传的名称？是的，它正在上传。但名称现在是问题所在。添加代码：$file=$dir.DIRECTORY\u分隔符。md5（rand（199999）.basename（$_文件['cf']['name']）；所以每个上传的文件都会有新的名字。你觉得可以吗？我应该在哪里添加它？图片已经上传。现在我该如何更改名称？很可能有些人会给他们的广告起相同的名字。那么，我如何输入一个不同于原始上传的名称？是的，它正在上传。但名称现在是问题所在。添加代码：$file=$dir.DIRECTORY\u分隔符。md5（rand（199999）.basename（$_文件['cf']['name']）；所以每个上传的文件都会有新的名字。对你合适吗？我在哪里添加它？