RE: Re: How to check value of checkbox on form submit?

In other words, your form will work if your HTML is exactly like this:

<input type="checkbox" name="checkbox1" value="on">
[download]

Then value=pair in this case would be checkbox1=on (if checked obviously). I disagree that if not checked your $input{'checkbox1'} would be undefined. That would vary depdending on the query string parsing method. It may be null, but not necessarily undef. This might be a source for errors down the road.

Comment on RE: Re: How to check value of checkbox on form submit? Download Code

Replies are listed 'Best First'.
RE: RE: Re: How to check value of checkbox on form submit? by perlmonkey (Hermit) on May 10, 2000 at 23:22 UTC
If the checkbox is not checked then it will not get posted to the query string. There will be no reference what-so-ever to the paramater (checkbox1 in this case). So the exists function mention below would probably be the easiest. Maybe this is just with my server (Apache), but I dont think so.	[reply]
RE: RE: Re: How to check value of checkbox on form submit? by raflach (Pilgrim) on May 10, 2000 at 19:14 UTC
However, just setting a value of on in the html and then checking for that value in the script should always work. Whether undefined or null, it definately won't equal the string "on" so...	[reply]
RE: RE: RE: Re: How to check value of checkbox on form submit? by BBQ (Curate) on May 10, 2000 at 19:21 UTC
You're right! I thought that sounded a little odd so I ran the following test: `<html><body> <form action="http://johnny.warp.psi.br/cgi-bin/test.pl"> <input type="text" name="field1"> <input type="checkbox" name="field2" value="on"> <input type="submit"> </form> </body> </html>` [download] If this form is submitted with everything blank, curiously the text input gets carried as null, but the checkbox is undef! QUERY_STRING : field1= I don't see where the consistency is here, but that was something I had never really noticed.	[reply] [d/l]


laziness, impatience, and hubris
	PerlMonks