文件上传不检查现有的文件 [英] File upload is not checking for the existing file

问题描述

我有一个PHP文件上传程序。我想添加一个功能的程序，这是检查目录中是否存在相同的文件。

我想像这样添加到我的代码：

  if（file_exists（directory_name /。$ _FILES [file] [name ]））
 {
 echo $ _FILES [file] [name]。  已经存在。 ; 
} 
  

这里是我的php文件上传器代码：

 <？php 
 
 $ valid_formats = array（jpg，png， gif，JPEG，bmp，JPG，PNG，GIF）; 
 $ max_file_size = 1024 * 500; // 100 kb 
 $ path =images / $ _ POST [fol] /; //上传目录
 $ count = 0; 
 $ b $ if（isset（$ _ POST）and $ _SERVER ['REQUEST_METHOD'] ==POST）{
 //循环$ _FILES来执行所有文件
 foreach（$ _FILES ['files'] ['name'] as $ f => $ name）{
 if（$ _FILES ['files'] ['error'] [$ f] == 4）{
继续; （$ _FILES ['files'] ['error'] [$ f] == 0）{
 
 if（$ _FILES ['files'] [ 'size'] [$ f]> $ max_file_size）{
 $ message [] =$ name is too large !.; 
继续; 
 
 elseif（！in_array（pathinfo（$ name，PATHINFO_EXTENSION），$ valid_formats））{
 $ message [] =$ name不是有效的格式; 
继续; 
 
 
 $ b其他{
 if（move_uploaded_file（$ _ FILES [files] [tmp_name] [$ f]，$ path。$ name） ）
 $ count ++; 
} 
} 
} 
} 
？> 
  

如何结合两者？任何人都可以帮忙吗？

解决方案

在移动文件之前检查文件是否存在。
尝试像

  else {
 if（file_exists（$ path。$ name）
 {
 file already exixts 
 
 if（move_uploaded_file（$ _ FILES [files] [tmp_name] [$ f]，$ path。$ name））
 $ count ++; 
} 
  

I have a php file uploader program. I want to add one more functionality to the program, that is checking whether the same file exists in the directory.

I want to add something like this to my code:

if (file_exists("directory_name/" . $_FILES["file"]["name"]))
      {
      echo $_FILES["file"]["name"] . " already exists. ";
      }  

And Here is my php file uploader code:

<?php

$valid_formats = array("jpg", "png", "gif", "JPEG", "bmp", "JPG", "PNG", "GIF");
$max_file_size = 1024*500; //100 kb
$path = "images/$_POST[fol]/"; // Upload directory
$count = 0;

if(isset($_POST) and $_SERVER['REQUEST_METHOD'] == "POST"){
    // Loop $_FILES to exeicute all files
    foreach ($_FILES['files']['name'] as $f => $name) {     
        if ($_FILES['files']['error'][$f] == 4) {
            continue; 
        }          
        if ($_FILES['files']['error'][$f] == 0) {              

            if ($_FILES['files']['size'][$f] > $max_file_size) {
                $message[] = "$name is too large!.";
                continue;
            }
            elseif( ! in_array(pathinfo($name, PATHINFO_EXTENSION), $valid_formats) ){
                $message[] = "$name is not a valid format";
                continue; 
            }


            else{ 
                if(move_uploaded_file($_FILES["files"]["tmp_name"][$f], $path.$name))
                $count++; 
            }
        }
    }
}
?>

How to combine both? can anyone help?

解决方案

Check before moving the file whether the file exists or not .. Try something like

        else{ 
                if (file_exists($path.$name)
                {
                  file already exixts
                }  
                if(move_uploaded_file($_FILES["files"]["tmp_name"][$f], $path.$name))
                $count++; 
            }

这篇关于文件上传不检查现有的文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！