Re: Unexplained Issue Using Regex

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Nitsan Bin-Nun schreef:
> Hi lista,
> 
> I have been trying to figure this out for the last couple of hours but I'm
> lack of luck.
> Take a look at these regex's, the string that was inputed into the
> preg_replace (using Uis modificators) and the results:
> (the lists have correspondence to each other)
> 
> ORIGINAL STRING
> ----
> 
> http://www.zshare.net/video/541070871c7a8d9c
> http://www.guba.com/watch/2000821351
> http://www.veoh.com/videos/v4609719YfsCFpf
> 
> 
> REGEX USED (with Uis modificators)
> ----
> http:\/\/(www\.|)zshare\.net\/video\/([^\/]+)               $3
> http:\/\/(www\.|)guba\.com\/watch\/([0-9]+)              $3
> http:\/\/(www\.|)veoh\.com\/videos\/([^\/]+)
> 
> THE RETURNED STRING
> ----
> 41070871c7a8d9c
> 000821351
> 4609719YfsCFpf
> 
> If you will go through this carefully you will notice that the first
> character of each matching group is being deleted.
> The regex's and the replacements string are being fetched from the database
> (mysql) and goes straight to the preg_replace function with the original
> string.
> 
> I have no idea why this happens.
> I'm looking forward for your opinions and suggestions.

php -r '
var_dump(preg_replace("#http:\/\/(www\.|)zshare\.net\/video\/([^\/]+)#Ui", "\\2", "http://www.zshare.net/video/541070871c7a8d9c";));
'
string(16) "541070871c7a8d9c"

given the above test I don't see the problem with the regexp
(but you don't actually show the code so it's hard to tell), I'd
probably look else where for the char munching culprit.

> 
> Regards,
> Nitsan
> 


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