On Wed, 2011-05-04 at 13:20 -0600, Jason Gerfen wrote:

> I am running into a problem using the REGEXP option with filter_var().
> The string I am using: 09VolunteerApplication.doc
> The PCRE regex I am using:
> /^[a-z0-9]\.[doc|pdf|txt|jpg|jpeg|png|docx|csv|xls]{1,4}$/Di
> The function in it's entirety:
> return (!filter_var('09VolunteerApplication.doc',
> array('options'=>array('regexp'=>'/^[a-z0-9]\.[doc|pdf|txt|jpg|jpeg|png|docx|csv|xls]{1,4}$/Di'))))
> ? false : true;
> Anyone have any insight into this?

You missed a + in your regex, at the moment you're only checking to see
if a file starts with a single a-z or number and then is followed by the
period. Then you're checking for oddly for one to four extensions in the
list, are you sure you want to do that? And the square brackets are used
to match characters, not strings, use the standard brackets to allow
from a choice of strings

Try this:


One other thing you should be aware of maybe, filenames won't always
consist of just the letters a-z and numbers 0-9, they may contain
accented or foreign letters, hyphens, spaces and a number of other
characters depending on the client machines OS. Windows allows very few
characters for example compared to the Unix-like OS's like MacOS and


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