Question

以下代码将图像上传到临时目录，并在将文件大小添加到最终目录之前检查它们。但是如果我上传一个大文件，脚本会超时。如何在将文件添加到临时目录之前检查文件大小？

    <?
$target_dir = "uploads/";
$new_file_name = time() . "_" . basename($_FILES["fileToUpload"]["name"]);
$target_file = $target_dir . $new_file_name;
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);

// Check if image file is a actual image or fake image
if(isset($_POST["submit"])) {
    $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
    if($check !== false) {
        echo "File is an image - " . $check["mime"] . ".";
        $uploadOk = 1;
    } else {
        echo "File is not an image.";
        $uploadOk = 0;
    }
}

// Check if file already exists
if (file_exists($target_file)) {
    echo "Sorry, file already exists.";
    $uploadOk = 0;
}

// Check file size
if ($_FILES["fileToUpload"]["size"]/1024 > 5000) {
    echo "Sorry, your file is too large.";
    $uploadOk = 0;
}

// Allow certain file formats
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
    echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
    $uploadOk = 0;
}

// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
    echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {
    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
        header('Location: publish.php?photo=' . $new_file_name);
        echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
    } else {
        echo "Sorry, there was an error uploading your file.";


        //debug
        echo "Upload: " . $_FILES["fileToUpload"]["name"] . "<br>";
        echo "Type: " . $_FILES["fileToUpload"]["type"] . "<br>";
        echo "Size: " . ($_FILES["fileToUpload"]["size"] / 1024) . " kB<br>";
        echo "Stored in: " . $_FILES["fileToUpload"]["tmp_name"];


    }
}


include('modules/head.php');

?>


<form action="sell.php" method="post" enctype="multipart/form-data">
    Select image to upload:
    <input type="file" name="fileToUpload" id="fileToUpload">
    <input type="submit" value="Upload Image" name="submit">
</form>

Answer 1

首先，您可以在php.ini中限制允许的最大上传大小

还有一个想法 - 您可以编写javascript客户端代码来验证文件大小，然后再将其发送到服务器上

Answer 2

您需要在php.ini中设置upload_max_filesize和post_max_size的值：

; Maximum allowed size for uploaded files. upload_max_filesize = 40M

; Must be greater than or equal to upload_max_filesize post_max_size = 40M After modifying php.ini file(s), you need to restart your HTTP server to use new configuration.

如果你不能改变你的php.ini，那你就不走运了。您无法在运行时更改这些值;上传文件大于php.ini中指定的值将在执行到达ini_set时失败。

在使用PHP上传到临时目录之前检查图像的文件大小

2 个答案: