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File name of email attachment

I build the filename of an email attachment based on a "property description".

In a particular case, the property description is #68 Residence.

That is passed as a $_GET variable to the emailing routine; I'm guessing that either # is not allowed in a file name (or more likely) # does not get properly passed in the query string.

Should I just replace # with # in the query string? Not sure if that stuff in a file name would work.

Or maybe better yet, I could probably just throw away the #, not needed in this case, but there are probably other special characters.

Suggested solution?
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Richard Korts
Asked:
Richard Korts
3 Solutions
 
zephyr_hex (Megan)DeveloperCommented:
If you're adding the $_GET parameter using PHP, you should use urlencode() to properly encode your url.

If you're using something other than PHP, please let us know how that parameter is added to the url.
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Dave BaldwinFixer of ProblemsCommented:
Get rid of any version of '#', it is not a legal part of the file name in a query string.  It is used to locate a named or id'd anchor on a page.  In addition, any spaces will be changed to %20.  It is best not to have spaces in the first place.
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gr8gonzoConsultantCommented:
When I deal with filenames, I usually replace any non-valid characters with underscores:

$file = "My Residence @ #68 main st.";
$file  = preg_replace("/[^a-zA-Z0-9]/","_",$file);
// $file is now "My_Residence___68_main_st_";

You can additionally trim the _ down a little bit (consolidate multiple ___ to just one _, etc), but that should ensure that all filenames will be valid.
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Richard KortsAuthor Commented:
Thank you, I got all of it I & understand.

Richard
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