如果存在，PHP重命名文件名将数字附加到结尾

Question

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++;
}

Answer 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++;
}

Answer 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";
}

Answer 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

Answer 4

I checked SO and found a nice C# answer here , so I ported it for PHP:

$count = 0;
while (file_exists($filePath) === true) {
    if ($count === 0) {
        $filePath = str_replace($extension, '[' . ++$count . ']' . ".$extension", $filePath);
    } else {
        $filePath = str_replace("[$count].$extension", '[' . ++$count . ']' . ".$extension", $filePath);
    }
}