PHP: How to remove unnecessary dots in filename on file upload?

Question

I have a script to upload files with PHP. I already do some cleaning to remove ugly characters.

I would also like to to remove dots in the filename, EXCEPT for the last one, which indicates the file extension.

Anyone has an idea how I could do that.?

For example, how would you get

$filename = "water.fall_blue.sky.jpg";
$filename2 = "water.fall_blue.sky.jpeg";

to return this in both cases..?

water.fall_blue.sky

possible duplicate of [How to extract a file extension in PHP ?](http://stackoverflow.com/questions/173868/how-to-extract-a-file-extension-in-php) and [Fastest Way to replace String in PHP](http://stackoverflow.com/questions/3869829/fastest-way-to-replace-string-in-php) — Gordon, Nov 03 '10 at 16:47

score 10 · Accepted Answer · answered Nov 03 '10 at 15:48

10

Use pathinfo() to extract the file name (the "filename" array element is available since PHP 5.2); str_replace() all the dots out of it; and re-glue the file extension.

answered Nov 03 '10 at 15:48

Pekka

442,112
142
972
1,088

Great.! Learned something new today.! Thanks. – pnichols Nov 03 '10 at 16:36

Cpt. eMco · Answer 2 · 2010-11-03T15:57:22.937

4

Here's an example of how this can be done:

<?php
$string = "really.long.file.name.txt";
$lastDot = strrpos($string, ".");
$string = str_replace(".", "", substr($string, 0, $lastDot)) . substr($string, $lastDot);
?>

It converts filenames like so:

really.long.file.name.txt -> reallylongfilename.txt

Check here: example

[Edit] Updated script, dot position is cached now

edited Nov 03 '10 at 15:57

answered Nov 03 '10 at 15:51

Cpt. eMco

565
4
13

2

would it not be better to substitute the `.` with a `_` ? – RobertPitt Nov 03 '10 at 15:53
You should cache `strrpos($string, ".")` there not to run it twice. – Core Xii Nov 03 '10 at 15:54

score 1 · Answer 3 · answered Sep 01 '16 at 10:42

FILENAME = this/is(your,file.name.JPG

$basename=basename($_FILES['Filedata']['name']);

$filename=pathinfo($basename,PATHINFO_FILENAME);
$ext=pathinfo($basename,PATHINFO_EXTENSION);

//replace all these characters with an hyphen
$repar=array(".",","," ",";","'","\\","\"","/","(",")","?");

$repairedfilename=str_replace($repar,"-",$filename);
$cleanfilename=$repairedfilename.".".strtolower($ext);

RESULT = this-is-your-file-name.jpg

PHP: How to remove unnecessary dots in filename on file upload?

3 Answers3

Linked