在 PHP 中重命名和上传多个图像答案

【问题标题】：Multiple images rename & uploading in PHP在 PHP 中重命名和上传多个图像
【发布时间】：2014-08-02 23:15:15
【问题描述】：

我正在使用以下代码将一组图像上传到服务器，我在上传时重命名文件，但是当我尝试上传多个文件时，它会自动替换文件，而不是我需要命名其他文件文件名末尾有 2、3、4 等。

<input type="file" name="upl" />
<input type="submit" value="submit" />

$_SESSION['imgrand'] 是生成并通过会话传递的随机字符串。

function findexts ($filename) 
 { 
 $filename = strtolower($filename) ; 
 $exts = split("[/\\.]", $filename) ; 
 $n = count($exts)-1; 
 $exts = $exts[$n]; 
 return $exts; 
 } 
 $ext = findexts ($_FILES['upl']['name']) ; 
 $ran = $_SESSION['imgrand'];
 $ran2 = $ran.".";
 $target = "uploads/";
 $target = $target . $ran2.$ext; 

 if(move_uploaded_file($_FILES['upl']['tmp_name'], $target)) 
 {
 echo "The file has been upl as ".$ran2.$ext;
 } 
 else
 {
 echo "Sorry, there was a problem uploading your file.";
 }

例如，如果随机字符串是 jahkhakshdkjshdjksahds，我需要将图像命名为 jahkhakshdkjshdjksahds1.ext、jahkhakshdkjshdjksahds2.ext、jahkhakshdkjshdjksahds3.ext、jahkhakshdkjshdjksahds4.ext、jahkhakshdkjshdjksahds5.ext。?>

【问题讨论】：

标签： php

【解决方案1】：

在overright之前测试现有文件。

...
$ext = findexts ($_FILES['upl']['name']) ; 
$ran = $_SESSION['imgrand'];
$target = "uploads/".$ran;

for($i=1;$i < 100;$i++) {
  $filename = $target.$i.".".$ext;
  if (file_exists($filename)) {
    continue;
  } else {
    if(move_uploaded_file($_FILES['upl']['tmp_name'], $filename)) 
    {
    echo "The file has been upl as : ".$filename;
    break; 
    } 
    else
    {
    echo "Sorry, there was a problem uploading your file: ".$filename;
    break;
    }
  } // not file_ex
} // for
...

【讨论】：