[SOLVED] strip chars from a file name

[steveh62]

I have a filename say how do I strip out chars + that I do not want or any other none file alphanumeric or at least replace dodgy chars with underscores

 

<?php

$imagename = $_FILES['new_image']['name'];

//imagename = copper+1.jpg
?>

[rhodesa]

$imagename = $_FILES['new_image']['name'];
$imagename = preg_replace('/[^\w]/','_',$imagename);

 

that should replace anything that isn't alphanumeric or an underscore with an underscore

[steveh62]

cheers for that...but I need to keep the .jpg file extension

[rhodesa]

oh yeah...lol...try this:

<?php
$imagename = 'this is a +bad file.name.jpg';
$filename = substr($imagename,0,strrpos($imagename,'.'));
$ext = substr($imagename,strrpos($imagename,'.'));
$imagename = preg_replace('/[^\w]/','_',$filename).$ext;
print $imagename;
?>