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From: Camilo Sperberg on 18 Aug 2010 14:01
Hello list :)

Just a short question which I know it should be easy, but I'm no expert yet
in regular expressions.
I've got a nice little XML string, which is something like this but can be
changed:

<?xml version="1.0" encoding="utf-8"?>
<boolean xmlns="http://tempuri.org/">false</boolean>

The boolean value can be true or false, so what I want to do, is filter it.
I've done it this way, but I know it can be improved (just because I love
clean coding and also because I want to master regular expressions xD):

$result = preg_match('/true/',$curl_response);
if ($result == 0) $result = preg_match('/false/',$curl_response);

I've also tried something like:
$result = preg_replace('/^(true)|^(false)/','',$curl_response); // if not
true OR not false => replace with empty

and also '/^true|^false/' which doesn't seem to work.

Any ideas to filter this kind of string in just one expression?

Thanks in advance :)

--
Mailed by:
UnReAl4U - unreal4u
ICQ #: 54472056
www1: http://www.chw.net/
www2: http://unreal4u.com/
From: Shreyas Agasthya on 18 Aug 2010 14:06
Camilo,

What exactly are you trying to achieve? Meaning:

if (true)
do this;
if (false)
do that;

However, here's a link that I used long back to help me with some RegEx :
http://www.gskinner.com/RegExr/

Regards,
Shreyas

On Wed, Aug 18, 2010 at 11:31 PM, Camilo Sperberg <csperberg(a)unreal4u.com>wrote:

> Hello list :)
>
> Just a short question which I know it should be easy, but I'm no expert yet
> in regular expressions.
> I've got a nice little XML string, which is something like this but can be
> changed:
>
> <?xml version="1.0" encoding="utf-8"?>
> <boolean xmlns="http://tempuri.org/">false</boolean>
>
> The boolean value can be true or false, so what I want to do, is filter it.
> I've done it this way, but I know it can be improved (just because I love
> clean coding and also because I want to master regular expressions xD):
>
> $result = preg_match('/true/',$curl_response);
> if ($result == 0) $result = preg_match('/false/',$curl_response);
>
> I've also tried something like:
> $result = preg_replace('/^(true)|^(false)/','',$curl_response); // if not
> true OR not false => replace with empty
>
> and also '/^true|^false/' which doesn't seem to work.
>
> Any ideas to filter this kind of string in just one expression?
>
> Thanks in advance :)
>
> --
> Mailed by:
> UnReAl4U - unreal4u
> ICQ #: 54472056
> www1: http://www.chw.net/
> www2: http://unreal4u.com/
>



--
Regards,
Shreyas Agasthya
From: Ashley Sheridan on 18 Aug 2010 15:01
On Wed, 2010-08-18 at 23:36 +0530, Shreyas Agasthya wrote:

> Camilo,
>
> What exactly are you trying to achieve? Meaning:
>
> if (true)
> do this;
> if (false)
> do that;
>
> However, here's a link that I used long back to help me with some RegEx :
> http://www.gskinner.com/RegExr/
>
> Regards,
> Shreyas
>
> On Wed, Aug 18, 2010 at 11:31 PM, Camilo Sperberg <csperberg(a)unreal4u.com>wrote:
>
> > Hello list :)
> >
> > Just a short question which I know it should be easy, but I'm no expert yet
> > in regular expressions.
> > I've got a nice little XML string, which is something like this but can be
> > changed:
> >
> > <?xml version="1.0" encoding="utf-8"?>
> > <boolean xmlns="http://tempuri.org/">false</boolean>
> >
> > The boolean value can be true or false, so what I want to do, is filter it.
> > I've done it this way, but I know it can be improved (just because I love
> > clean coding and also because I want to master regular expressions xD):
> >
> > $result = preg_match('/true/',$curl_response);
> > if ($result == 0) $result = preg_match('/false/',$curl_response);
> >
> > I've also tried something like:
> > $result = preg_replace('/^(true)|^(false)/','',$curl_response); // if not
> > true OR not false => replace with empty
> >
> > and also '/^true|^false/' which doesn't seem to work.
> >
> > Any ideas to filter this kind of string in just one expression?
> >
> > Thanks in advance :)
> >
> > --
> > Mailed by:
> > UnReAl4U - unreal4u
> > ICQ #: 54472056
> > www1: http://www.chw.net/
> > www2: http://unreal4u.com/
> >
>
>
>


As far as I can tell, are you just trying to grab the content from the
<boolean> tag text node? If it's limited to this basic example, there's
likely not much of a need to use dedicated DOM functions, but consider
using them if you need to work on more complex documents.

If you are just trying to determine if the value is indeed true or false
and nothing else, then a regex could be overkill here. As you only need
to check two values, consider:

if(strpos($xml, 'true') || strpos($xml, 'false'))
{
// text node content is OK
}
else
{
// bad, bad input, go sit in the corner
}

Thanks,
Ash
http://www.ashleysheridan.co.uk


From: Camilo Sperberg on 18 Aug 2010 15:53
On Wed, Aug 18, 2010 at 15:01, Ashley Sheridan <ash(a)ashleysheridan.co.uk>wrote:

> On Wed, 2010-08-18 at 23:36 +0530, Shreyas Agasthya wrote:
>
> Camilo,
>
> What exactly are you trying to achieve? Meaning:
>
> if (true)
> do this;
> if (false)
> do that;
>
> However, here's a link that I used long back to help me with some RegEx :http://www.gskinner.com/RegExr/
>
> Regards,
> Shreyas
>
> On Wed, Aug 18, 2010 at 11:31 PM, Camilo Sperberg <csperberg(a)unreal4u.com>wrote:
>
> > Hello list :)
> >
> > Just a short question which I know it should be easy, but I'm no expert yet
> > in regular expressions.
> > I've got a nice little XML string, which is something like this but can be
> > changed:
> >
> > <?xml version="1.0" encoding="utf-8"?>
> > <boolean xmlns="http://tempuri.org/">false</boolean>
> >
> > The boolean value can be true or false, so what I want to do, is filter it.
> > I've done it this way, but I know it can be improved (just because I love
> > clean coding and also because I want to master regular expressions xD):
> >
> > $result = preg_match('/true/',$curl_response);
> > if ($result == 0) $result = preg_match('/false/',$curl_response);
> >
> > I've also tried something like:
> > $result = preg_replace('/^(true)|^(false)/','',$curl_response); // if not
> > true OR not false => replace with empty
> >
> > and also '/^true|^false/' which doesn't seem to work.
> >
> > Any ideas to filter this kind of string in just one expression?
> >
> > Thanks in advance :)
> >
> > --
> > Mailed by:
> > UnReAl4U - unreal4u
> > ICQ #: 54472056
> > www1: http://www.chw.net/
> > www2: http://unreal4u.com/
> >
>
>
>
>
>
> As far as I can tell, are you just trying to grab the content from the
> <boolean> tag text node? If it's limited to this basic example, there's
> likely not much of a need to use dedicated DOM functions, but consider using
> them if you need to work on more complex documents.
>
> If you are just trying to determine if the value is indeed true or false
> and nothing else, then a regex could be overkill here. As you only need to
> check two values, consider:
>
> if(strpos($xml, 'true') || strpos($xml, 'false'))
> {
> // text node content is OK
> }
> else
> {
> // bad, bad input, go sit in the corner
> }
>
>
Indeed Ashley, I'm trying to get the TRUE / FALSE value from the boolean
tag.

After reading again, you're absolutely right: strpos does just what I need
it to do: a simple search for a true or false. (Or null, in which case
strpos will be FALSE anyway).

Thanks for your suggestion, I was doing an overkill here.

@Shreyas: thanks for the link! It is very helpful to speed up the testing a
bit!

Greetings!


--
Mailed by:
UnReAl4U - unreal4u
ICQ #: 54472056
www1: http://www.chw.net/
www2: http://unreal4u.com/
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