safe file naming?

[Admin]

is there a function to create safe file names? i cant seem to locate any

something like this:

PHP Code:

$foo = "this !!! isn't a good";
$bar = " ## file name";

$filename = someFunction("$foo-$bar");

echo "$filename"; 


and $filename would return something like this: "this_isnt_a_good_file_name"

anything?

[sde]

what about a bunch of str_replace() things

PHP Code:

<?
function goodName($filename)
{
  $filename=str_replace(" ","_",$filename);

  // caution, i don't know regex that well so this is probably wrong.
  // but use a match that matches only things that are NOT
  // alphanumeric chars & underscore
  // and replace them with "" nothing.
  $filename=preg_replace("[^A-Za-z0-9_]","",$filename);

  return $filename;
}
?>

[joe_bruin]

what's wrong with that filename? works on windows and linux.

most unixlike systems will allow everything in a filename except tab, linefeed, carriage return, and forward slash. (did i miss any)?

windows does not allow the ones above plus the following:
\ / " * ? < > |

do an strtr() on characters you don't like.

[Admin]

browsers dont seem to like # in the filename. i figure there are more characters that arent accepted.

ill check that function out, thanks.

[abc123]

browsers don't like literal "#" and special characters in url's but you you can encode as odd ones you can think of, i.e: "%20" represents " " (space).


just a note, you cannot name any file in windows beginning with "con".

i.e:
con.exe
con.txt
con.bat
con.java
con.cpp


none of these will work, windows doesn't allow it!

[Ilya020]

Originally posted by abc123
browsers don't like literal "#" and special characters in url's but you you can encode as odd ones you can think of, i.e: "%20" represents " " (space).


just a note, you cannot name any file in windows beginning with "con".

i.e:
con.exe
con.txt
con.bat
con.java
con.cpp


none of these will work, windows doesn't allow it!

why not??

Ilya.

[joe_bruin]

"con" is the console filename. it is reserved.

try doing "copy somefile.txt con" in a command window, and you'll see that it writes it to the console.