Php 我只想上传TXT文件，怎么了？

当我想上传

txt

文件时我遇到了问题，问题是当我想上传

file.txt

告诉我错了你必须更改

txt

文件！！执行时我做了条件！='txt’不是，上传时可以，但盖伊怎么了

<?php
$target_dir = "uploads/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["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 if file already exists
    if (file_exists($target_file)) {
        echo "Sorry, file already exists.";
        $uploadOk = 0;
    }

    // Allow certain file formats
    if($imageFileType != "txt") {
        echo "Sorry, only txt,  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)) {
            echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
        } else {
            echo "Sorry, there was an error uploading your file.";
        }
    }
}

?>

---

尝试使用以下命令获取文件扩展名：

$ex = explode(".", basename($_FILES["fileToUpload"]["name"]));
$ext = $ex[count($ex) - 1];

但请确保上传的文件不能通过web浏览器访问，也不能被您的服务器解析-文件扩展名没有说明任何内容，这可能是恶意的。

更改

if($imageFileType != "txt") {

到

---

是的，先生，我也没有，同样的问题！我用linux就是那个问题！我在linux中解决了这个问题，因为扩展与windows不一样，谢谢大家

 if ($_FILES['file']['type'] == 'text/plain')