Re: [PHP] PCRE regexp bug ?
* Thus wrote [EMAIL PROTECTED] ([EMAIL PROTECTED]):
>
> I believe I spoke too soon. If I use isset() then even if I leave the
> field empty it still returns true. I am trying to view the documentation for
> this function but php.net seems to be timing out now.
> > if (isset($_POST[MI]) && (preg_match('/^[[:alpha:]]{1,1}$/', $_POST[MI]) == 0))
That is because the browser is sending in the POST data:
MI=
Thus, php does set it to ''.
Use something like this instead:
if (strlen($_POST['MI'])) ...
btw, you should really quote your array keys.
HTH,
Curt
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Re: [PHP] PCRE regexp bug ?
I believe I spoke too soon. If I use isset() then even if I leave the
field empty it still returns true. I am trying to view the documentation for
this function but php.net seems to be timing out now.
On Fri, 15 Aug 2003 [EMAIL PROTECTED] wrote:
>
> Thank you. I did the following:
>
> if (isset($_POST[MI]) && (preg_match('/^[[:alpha:]]{1,1}$/', $_POST[MI]) == 0))
>
> and zero is caught.
>
> On Fri, 15 Aug 2003, CPT John W. Holmes wrote:
>
> > From: <[EMAIL PROTECTED]>
> >
> > > I use preg_match to validate the Middle Initial field of a form and so far
> > > it works, except yesterday a user submitted a "0" (zero) as a middle
> > > initial! My regexp is:
> > >
> > > if (!empty($_POST[MI]) && (preg_match('/^[[:alpha:]]{1,1}$/', $_POST[MI])
> > == 0))
> > >
> > > I tested it with 0-9 and my regexp catches every digit except 0.
> > Curious...
> >
> > empty("0") is going to be true. So, !empty("0") is going to be false, so you
> > won't "catch" the zero.
> >
> > ---John Holmes...
> >
> >
>
>
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Re: [PHP] PCRE regexp bug ?
Thank you. I did the following:
if (isset($_POST[MI]) && (preg_match('/^[[:alpha:]]{1,1}$/', $_POST[MI]) == 0))
and zero is caught.
On Fri, 15 Aug 2003, CPT John W. Holmes wrote:
> From: <[EMAIL PROTECTED]>
>
> > I use preg_match to validate the Middle Initial field of a form and so far
> > it works, except yesterday a user submitted a "0" (zero) as a middle
> > initial! My regexp is:
> >
> > if (!empty($_POST[MI]) && (preg_match('/^[[:alpha:]]{1,1}$/', $_POST[MI])
> == 0))
> >
> > I tested it with 0-9 and my regexp catches every digit except 0.
> Curious...
>
> empty("0") is going to be true. So, !empty("0") is going to be false, so you
> won't "catch" the zero.
>
> ---John Holmes...
>
>
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Re: [PHP] PCRE regexp bug ?
* Thus wrote Curt Zirzow ([EMAIL PROTECTED]):
> * Thus wrote [EMAIL PROTECTED] ([EMAIL PROTECTED]):
> >
> > I use preg_match to validate the Middle Initial field of a form and so far
> > it works, except yesterday a user submitted a "0" (zero) as a middle
> > initial! My regexp is:
> >
> > if (!empty($_POST[MI]) && (preg_match('/^[[:alpha:]]{1,1}$/', $_POST[MI]) == 0))
> >
> > I tested it with 0-9 and my regexp catches every digit except 0. Curious...
>
> actaually 0-9 will never match that regexp.
Oops after reading my post to your post I see that is what you
wanted. sorry.
the 0 problem can be fixed by checking strlen($_POST[MI]) or
isset() instead of !empty().
Curt
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Re: [PHP] PCRE regexp bug ?
* Thus wrote [EMAIL PROTECTED] ([EMAIL PROTECTED]):
>
> I use preg_match to validate the Middle Initial field of a form and so far
> it works, except yesterday a user submitted a "0" (zero) as a middle
> initial! My regexp is:
>
> if (!empty($_POST[MI]) && (preg_match('/^[[:alpha:]]{1,1}$/', $_POST[MI]) == 0))
>
> I tested it with 0-9 and my regexp catches every digit except 0. Curious...
actaually 0-9 will never match that regexp.
print preg_match('/^[[:alpha:]]{1,1}$/', '1');
yields: 0
The reason is that 0-9 is not alpha. You should use [[:alnum:]]
instead. Or better yet /^\w{1,1}$/
HTH,
Curt
--
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Re: [PHP] PCRE regexp bug ?
From: <[EMAIL PROTECTED]>
> I use preg_match to validate the Middle Initial field of a form and so far
> it works, except yesterday a user submitted a "0" (zero) as a middle
> initial! My regexp is:
>
> if (!empty($_POST[MI]) && (preg_match('/^[[:alpha:]]{1,1}$/', $_POST[MI])
== 0))
>
> I tested it with 0-9 and my regexp catches every digit except 0.
Curious...
empty("0") is going to be true. So, !empty("0") is going to be false, so you
won't "catch" the zero.
---John Holmes...
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Re: [PHP] PCRE regexp bug ?
Not an answer but
'/^[[:alpha:]]{1,1}$/'
could be writen as
'/^[[:alpha:]]$/'
[EMAIL PROTECTED] wrote:
I use preg_match to validate the Middle Initial field of a form and so far
it works, except yesterday a user submitted a "0" (zero) as a middle
initial! My regexp is:
if (!empty($_POST[MI]) && (preg_match('/^[[:alpha:]]{1,1}$/', $_POST[MI]) == 0))
I tested it with 0-9 and my regexp catches every digit except 0. Curious...
--
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Re: [PHP] PCRE regexp bug ?
- Original Message -
From: <[EMAIL PROTECTED]>
>
> I use preg_match to validate the Middle Initial field of a form and so far
> it works, except yesterday a user submitted a "0" (zero) as a middle
> initial! My regexp is:
>
> if (!empty($_POST[MI]) && (preg_match('/^[[:alpha:]]{1,1}$/', $_POST[MI])
== 0))
>
> I tested it with 0-9 and my regexp catches every digit except 0.
Curious...
>
Maybe it thinks it's the letter O, have you tried using a font that puts a
line through the zero;-)
[sorry couldn't resist]
Cheers, Greg.
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[PHP] PCRE regexp bug ?
I use preg_match to validate the Middle Initial field of a form and so far
it works, except yesterday a user submitted a "0" (zero) as a middle
initial! My regexp is:
if (!empty($_POST[MI]) && (preg_match('/^[[:alpha:]]{1,1}$/', $_POST[MI]) == 0))
I tested it with 0-9 and my regexp catches every digit except 0. Curious...
--
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