【问题标题】:How do I change the name of a file to the data and time it was uploaded to the folder?如何将文件的名称更改为上传到文件夹的数据和时间?
【发布时间】:2018-03-22 22:56:20
【问题描述】:

这是我的代码,允许用户将图像上传到上传文件夹。目前,如果文件夹中已存在同名文件,则它不会接受文件。例如,如果用户 1 上传了一个名为 dog.jpeg 的文件,而用户 2 上传了一个同名文件。用户 2 文件不会被上传。

因此,我不会保留文件已有的名称,而是将名称更改为上传的时间和日期。关于如何做到这一点的任何想法?

<?php
    $target_dir = "uploads/";
    $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
    $uploadOk = 1;
    $imageFileType = strtolower(pathinfo($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"] > 500000) {
        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)) {
            echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded. ";
        } else {
            echo "Sorry, there was an error uploading your file. ";
        }
    }

    ?> 

提前致谢

【问题讨论】:

  • 看起来您正在使用$target_file 来定义文件的路径和名称。
  • 以下是我们不做的事情:根据您的意愿逐字调整从 w3schools 复制和粘贴的示例代码。

标签: php html image directory


【解决方案1】:

这个时间纯粹是一个 Unix 时间戳,而不是一个日期。如果要将其转换为日期,请使用date("Y/m/d",$time))

替换:

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

有了这个:

 if (file_exists($target_file)) {
       $time = time();         
       $target_file .= $time;
 }

$target_file 供稍后附加时间戳的 move_uploaded_file 使用。

【讨论】:

    猜你喜欢
    • 2016-02-03
    • 2015-01-09
    • 1970-01-01
    • 1970-01-01
    • 2020-06-08
    • 2023-04-02
    • 2015-07-17
    • 1970-01-01
    • 1970-01-01
    相关资源
    最近更新 更多