Re: pcre little problem

On Mon, Nov 7, 2011 at 5:54 AM, Richard Quadling <rquadling@gmail.com> wrote: > On 4 November 2011 16:52, QI.VOLMAR QI <qi.volmar@gmail.com> wrote: > >> i have this part of code that works with DOMDocument: >> >> public function translateNFeXML(NFE $nfe_factory) { >>        $inf_adic = $nfe_factory->createElement('infAdic'); >>        if ($this->inf_ad_fisco) { >>            $inf_adic_fisco = >> $nfe_factory->createElement('infAdicFisco', $this->inf_ad_fisco); >>            $inf_adic->appendChild($inf_adic_fisco); >>        } >> >>        $string = "a=10&b[]=20&c=30n°&d=40+:50"; >>        die(preg_filter('/[^:][[:punct:]]/', '', $string)); >>        $inf_cpl = $nfe_factory->createElement('infCpl', >> $this->inf_complementar); >> >> QUESTION: Why the preg_filter causes a end of the application, with no >> error throwing (even in die don't appears nothing)? > > > preg_filter() returns NULL if there are no matches and the subject is a > string. > > And ... > > php -r "die(null);" > > outputs nothing. Here: >>        die(preg_filter('/[^:][[:punct:]]/', '', $string)); Did you really want to do this: preg_filter('/[^:][[:punct:]]/', '', $string) or die("nothing returned\n"); ??? See http://php.net/manual/en/function.preg-filter.php "Return values" as Richard points out preg_filter returns NULL if there are no matched in a string. Now this is interesting: >>        $string = "a=10&b[]=20&c=30n°&d=40+:50"; There is a wide character in that string following 30n. The preg functions sometimes don't deal well with wide characters in my experience (it's not 100% anyway), you probably need to use the mb_ functions instead.