Re: Unexplained Issue Using Regex
| From: | Jim Lucas | Date: | Fri, 06 Mar 2009 21:40:19 +0000 |
| Subject: | Re: Unexplained Issue Using Regex | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-289493@lists.php.net to get a copy of this message | ||
Nitsan Bin-Nun wrote:
> 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.
>
> Regards,
> Nitsan
>
In my opinion...
http://us3.php.net/parse_url is your friend here...
<?php
$urls[] = 'http://www.zshare.net/video/541070871c7a8d9c';
$urls[] = 'http://www.guba.com/watch/2000821351';
$urls[] = 'http://www.veoh.com/videos/v4609719YfsCFpf';
$url_paths = array();
foreach ( $urls AS $id => $url ) {
$url_paths[$id] = parse_url($url, PHP_URL_PATH);
}
print_r($url_paths);
foreach ( $url_paths AS $paths ) {
list( , ,$value) = explode('/', $paths, 3);
echo $value;
}
?>
The above outputs the following:
--
Jim Lucas
"Some men are born to greatness, some achieve greatness,
and some have greatness thrust upon them."
Twelfth Night, Act II, Scene V
by William Shakespeare