PHP Rename File name if Exists Append Number to End

问题

I'm trying to rename the file name of an image when it's uploaded if it exists, say if my file name is test.jpg and it already exists I want to rename it as test1.jpg and then test2.jpg and so on. With the code I've written its changing my file name like so test1.jpg and then test12.jpg any advice on fixing this would be great thank!

PHP

$name = $_FILES['picture']['name'];
$actual_name = pathinfo($name,PATHINFO_FILENAME);
$extension = pathinfo($name, PATHINFO_EXTENSION);

$i = 1;
while(file_exists('tmp/'.$actual_name.".".$extension))
{           
    $actual_name = (string)$actual_name.$i;
    $name = $actual_name.".".$extension;
    $i++;
}

回答1:

Here's a minor modification that I think should do what you want:

$actual_name = pathinfo($name,PATHINFO_FILENAME);
$original_name = $actual_name;
$extension = pathinfo($name, PATHINFO_EXTENSION);

$i = 1;
while(file_exists('tmp/'.$actual_name.".".$extension))
{           
    $actual_name = (string)$original_name.$i;
    $name = $actual_name.".".$extension;
    $i++;
}

回答2:

Inspired from @Jason answer, i created a function which i deemed shorter and more readable filename format.

function newName($path, $filename) {
    $res = "$path/$filename";
    if (!file_exists($res)) return $res;
    $fnameNoExt = pathinfo($filename,PATHINFO_FILENAME);
    $ext = pathinfo($filename, PATHINFO_EXTENSION);

    $i = 1;
    while(file_exists("$path/$fnameNoExt ($i).$ext")) $i++;
    return "$path/$fnameNoExt ($i).$ext";
}

回答3:

There are several ways for renaming image in PHP before uploading to the server. appending timestamp, unique id, image dimensions plus random number etc.You can see them all here

First, Check if the image filename exists in the hosted image folder otherwise upload it. The while loop checks if the image file name exists and appends a unique id as shown below ...

function rename_appending_unique_id($source, $tempfile){

    $target_path ='uploads-unique-id/'.$source;
     while(file_exists($target_path)){
        $fileName = uniqid().'-'.$source;
        $target_path = ('uploads-unique-id/'.$fileName);
    }

    move_uploaded_file($tempfile, $target_path);

}

if(isset($_FILES['upload']['name'])){

    $sourcefile= $_FILES['upload']['name'];
    tempfile= $_FILES['upload']['tmp_name'];

    rename_appending_unique_id($sourcefile, $tempfile);

}

Check more image renaming tactics

来源：https://stackoverflow.com/questions/16136519/php-rename-file-name-if-exists-append-number-to-end

标签

php

file-upload

upload

rename

file-exists