在 PHP 中重命名 $_FILES（文件）答案

【问题标题】：Renaming a $_FILES (file) in PHP在 PHP 中重命名 $_FILES（文件）
【发布时间】：2015-12-12 08:35:28
【问题描述】：

我想知道为什么我的代码不能正确重命名我的文件。这就是我相信我的代码所做的。

从 POST 中获取 $_FILES（文件）
将其移至特定文件夹 (uploads/)
将其重命名为日期格式（我想这样做以便没有文件具有相同的名称）

<?php

session_start();

$temps = date('Y-m-d H:i:s');

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

if(isset($_POST["submit"])) {
    $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
    if($check !== false) {

    } else {
        $_SESSION['error'] = "This is not an image -.-";
        header('location:upload.php');
    }
}

if ($_FILES["fileToUpload"]["size"] > 2000000) {
    $_SESSION['error'] = "The uploaded image must be smaller than 2MB";
    header('location:upload.php');
}

if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
    $_SESSION['error'] = "Sorry, only JPG, PNG & GIF files are allowed";
    header('location:upload.php');
}

if ($uploadOk == 0) {
    $_SESSION['error'] = "There was an error uploading your file, please try again !";
    header('location:upload.php');
} 
else {
    $new = ($target_dir.$temps.'.'$imageFileType);
    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
        if (rename($target_file, $new) == true)
        {
            $_SESSION['error'] = "Your image has been uploadsdsaded with success ... Hurray !";
            header('location:upload.php');
        }
        else{
        $_SESSION['error'] = "There was an error uploading your file, please try again !";
        header('location:upload.php');
        }
    } else {
        $_SESSION['error'] = "There was an error uploading your file, please try again !";
        header('location:upload.php');
    }
}
?>

非常感谢。我是 PHP 新手，所以如果您有任何其他提示，请随时告诉他们:)

编辑：文件实际上是从临时目录移动到目标目录，只是不会被重命名。

【问题讨论】：

标签： php file post

【解决方案1】：

你可以替换

$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);

与

$temps = time();
$target_file = $target_dir . $temps . '.' . $imageFileType;

以及底部的 if/else 语句

if ($uploadOk == 0) {
    $_SESSION['error'] = "There was an error uploading your file, please try again !";
    header('location:upload.php');
} else {
    if (!move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
        $_SESSION['error'] = "There was an error uploading your file, please try again !";
        header('location:upload.php');
    }
}

完整的文件。

<?php
session_start();

$target_dir = "uploads/";
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
$temps = time();
$target_file = $target_dir . $temps . '.' . $imageFileType;

if(isset($_POST["submit"])) {
    $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
    if($check !== false) {

    } else {
        $_SESSION['error'] = "This is not an image -.-";
        header('location:upload.php');
    }
}

if ($_FILES["fileToUpload"]["size"] > 2000000) {
    $_SESSION['error'] = "The uploaded image must be smaller than 2MB";
    header('location:upload.php');
}

$allowed_extensions = array("jpg", "png", "jpeg", "gif");

if(!in_array($imageFileType, $allowed_extensions)) {
    $_SESSION['error'] = "Sorry, only JPG, PNG & GIF files are allowed";
    header('location:upload.php');
}

if ($uploadOk == 0) {
    $_SESSION['error'] = "There was an error uploading your file, please try again !";
    header('location:upload.php');
} else {
    if (!move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
        $_SESSION['error'] = "There was an error uploading your file, please try again !";
        header('location:upload.php');
    }
}
?>

【讨论】：

非常感谢，我的 if（对于扩展）似乎不起作用，有什么原因吗？它假设只是 jpeg、png 和 gif，但他让它们全部进入。//没关系，现在我了解了标题的工作原理，它们只应用于页面末尾。谢谢
@GabrielRoy 添加了对答案所做更改的完整文件，您可以测试一下吗？如果文件过滤仍然不起作用，您可以在问题中添加var_dump($imageFileType)。

【解决方案2】：

文件名不能有“:”字符。尝试使用 time() 之类的其他方法，它会返回当前时间戳，或者只是将时间中的“：”字符更改为“-”。

【讨论】：

仅适用于 Windows。 UNIX 系统对包含 : 的文件名没有问题。

【解决方案3】：

您可以使用以下内容：-

  $arrExtension = @explode('.', $_FILES["fileToUpload"]["name"]);
  $fileName = 'prefix-'. time() . '.' . $arrExtension[1]);

【讨论】：