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Re: Allow empty form fields regex

by matija (Priest)
on Mar 18, 2004 at 16:12 UTC ( [id://337719]=note: print w/replies, xml ) Need Help??


in reply to Allow empty form fields regex

Well, at first I wanted to say you only need to add a |(^$) to your regexp, but some experimentation has showed me that doesn't work.

Then I took a good look at you regexp. You are accepting any of a class of characters, one or more times. To accept an empty field as well, simply change the + to *: 

if ($contents != /^[\w \.\,\=\" \/<>]*$/ ){
$contentserror = "Error - message.";++$error;
}

[download]
It's not a general answer, but in your particular case, it should work.

Replies are listed 'Best First'.
Re: Re: Allow empty form fields regex
by Hissingsid (Sexton) on Mar 18, 2004 at 16:55 UTC
    Hi,

    Thanks for the excellent input.

    I played around a bit and this is what I have got working perfectly.

    if (($contents ne "") && (!($contents =~ /^[\w \.\,\=\" \/<>]+$/))){
$contentserror = "Error - message.";++$error;
}

    [download]
    For some reason this != was not helping the situation.

    Anyway Paladin, a big thanks I had been fiddleing for hours and now have a good solution thanks to your suggestion.

    Best wishes

    Sid

    Edit by castaway, added code tags

[reply]
[d/l]
      Apologies guys I missed the bit about !=/!~

      !~ does indeed work removing the need for some of the ()s.

      Many thanks Sid
[reply]

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