Re: preg_match

[Stut <stuttle@xxxxxxxxx>]

Please keep the conversation on the list!

On 27 Oct 2008, at 16:06, Alex Chamberlain wrote:
> > -----Original Message-----
> > From: Stut [mailto:stuttle@xxxxxxxxx]
> > Sent: 27 October 2008 15:54
> > To: Alex Chamberlain
> > Cc: 'PHP General list'
> > Subject: Re:  preg_match
> >
> > On 27 Oct 2008, at 15:46, Alex Chamberlain wrote:
> > > Problem solved:
> > > function __autoload($c) {
> > > $m = array();
> > > preg_match('/(?:^[A-Z][a-z]+)Controller/', $c, $m);
> > > if (count($m)) {
> > >  require_once(realpath(FS_CONTROLLER . '/' . strtolower($m[0]) .
> > > '.inc.php'));
> > > }
> > > }
> > >
> > > However (perhaps a more appropriate question), do you think there is
> > > an
> > > easier/better way to do this??
> >
> > See, that wasn't so hard was it!!
> >
> > Personally I'd have gone with something more like this...
> >
> > function __autoload($class)
> > {
> >   if (substr($class, -10) == 'Controller')
> >   {
> >     // No need for realpath here, it's not doing anything useful
> >     // The _once is probably redundant too, but it may be required
> >     // depending on how your code is arranged.
> >     require FS_CONTROLLER.'/'.strtolower($class).'.inc.php';
> >   }
> > }
> >
> > ...but there's always more than one solution.
> >
> > -Stut
>
>
> Ok, spurred on with the success so far (but not changing the form of  
> my code
> just yet), I changed it to:
>
> function __autoload($c) {
>  $m = array();
>
>  preg_match('/Fred(^[A-Z][a-zA-Z]+)/', $c, $m);
>  if (count($m)) {
>   require_once(realpath(FS_COMPONENT . '/' . strtolower($m[1]) .
> '.inc.php'));
>  }
>
>  var_dump($m);
>
>  preg_match('/(?:^[A-Z][a-z]+)Controller/', $c, $m);
>  if (count($m)) {
>   require_once(realpath(FS_CONTROLLER . '/' . strtolower($m[0]) .
> '.inc.php'));
>  }
> }
>
> With the aim of also matching anything starting with 'Fred'. It  
> didn't work
> until I took the caret ^ out:
>
> function __autoload($c) {
>  $m = array();
>
>  preg_match('/Fred([A-Z][a-zA-Z]+)/', $c, $m);
>  if (count($m)) {
>   require_once(realpath(FS_COMPONENT . '/' . strtolower($m[1]) .
> '.inc.php'));
>  }
>
>  var_dump($m);
>
>  preg_match('/(?:^[A-Z][a-z]+)Controller/', $c, $m);
>  if (count($m)) {
>   require_once(realpath(FS_CONTROLLER . '/' . strtolower($m[0]) .
> '.inc.php'));
>  }
> }
>
> What I don't understand is why I needed it in one, but not in  
> another??

If you're going to use regular expressions you need to read the manual  
to understand how they work. There's a whole section of the manual  
that covers this - go read it to understand what the ^ means!

-Stut

--
http://stut.net/

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