Help me with a script

by banel

Posted: 15 years ago 11 replies

PROGRAMMING

Hi guys, i need a script that can export the ires div from google. I have this:

Code:

$url = 'hxxp://google.com/search?q=site:warriorforum.com&hl=en&num=100';
$m= file_get_contents ($url);
$specific_div = 'ires';
preg_match_all('#<ol\s*(?:id|class)\s*=\s*"'.preg_quote($specific_div).'">(.+?)</ol>#is', $m, $match);
print implode("<br>",$match[1]);

I used this a while ago with another script... I tried to make a scraper but it seems that the above code it's not working.

Help me please.

#script

nmarley 15 years ago

Why not first download the web page and put the HTML into a file?

Then write a separate script to parse that file and extract the data you want.

This will accomplish 2 things:

1) Your development goes a lot faster, since you don't have to hit google every time you make changes to your regex.

2) You can actually see the data which you're searching through and change your regex accordingly (narrowing it down until you get what you need, etc).
- Thanks
{{ DiscussionBoard.errors[3035760].message }}
badwolf 15 years ago

are you sure the regexp is working? why not give us a sample of the html so we can check?
- Thanks
- 1 reply
Signature
www.videocardroundup.com -- news/views/tutorials for all things related to PC video/graphics cards
www.peonyplants.net -- the gorgeous world of peonies
{{ DiscussionBoard.errors[3036947].message }}
- banel 15 years ago
  
  Hi, thanks both of you for reply.
  
  @nmarley, @badwolf: That is what i want to do, to put the html into a file, but above i wrote the actual link for you guys to see the source. So, my html source file is the source from that link.
  
  I'm just having problems with regex.
  
  Thanks
  
  {{ DiscussionBoard.errors[3037027].message }}
Arbitbet 15 years ago

$url = 'hxxp://google.com/search?q=site:warriorforum.com&hl=en&num=100';
$m= file_get_contents ($url);
preg_match('/<div id=ires><ol>.*<\/ol><\/div>/Usi', $m, $matches);
print $matches[0];

please check.
- Thanks
{{ DiscussionBoard.errors[3037060].message }}
banel 15 years ago

@Arbitbet: Thank you sooo much!!! Can you recommend me a site where i can learn more about preg_match... i want to be able to make my own scripts. As you see, i need simple tasks and i don't want to come back where every time i have a problem.
Thanks again man.
- Thanks
- 1 reply
{{ DiscussionBoard.errors[3037204].message }}
- zapseo 15 years ago
  
  try PHP: Hypertext Preprocessor
  
  Thanks
  
  Signature
  Speed Read Copy -- 97% Off Value -- RAVE Reviews!
  
  {{ DiscussionBoard.errors[3037226].message }}

banel

15 years ago

@Arbitbet: One more question: if i want to get h3 class="r" ? I tried this but don't work.
preg_match('/<div id=ires><ol><li class=g><h3 class=r>.*<\/h3><\/li><\/ol><\/div>/Usi', $m, $matches);

Thanks
1 reply

{{ DiscussionBoard.errors[3037285].message }}

Arbitbet

15 years ago

Originally Posted by banel

@Arbitbet: One more question: if i want to get h3 class="r" ? I tried this but don't work.
preg_match('/<div id=ires><ol><li class=g><h3 class=r>.*</h3></li></ol></div>/Usi', , );

This is wrong.

I would have done so:
preg_match('/<div id=ires><ol>.*<\/ol><\/div>/Usi', $m, $matches); // scrape div ires
//for next step you must look, uses var_dump($matches), what you receive from last command
preg_match_all('/<h3 class="r">.*<\/h3>/Usi', $matches[0], $temp); // scrape h3 tags from div ires, preg_match_all - because div have many h3 tags
var_dump($temp[0]); // look result

Divide and Conquer!

Another way hxxp://php.net/manual/en/book.dom.php you can use DOM model.

About Regular Expression you can look it hxxp://php.net/manual/en/book.pcre.php or book "Mastering Regular Expressions" Jeffrey Friedl.

Thanks
1 reply

{{ DiscussionBoard.errors[3037603].message }}

Eager2SEO

15 years ago

Originally Posted by Arbitbet

This is wrong.

I would have done so:
preg_match('/<div id=ires><ol>.*</ol></div>/Usi', , ); // scrape div ires
//for next step you must look, uses var_dump(), what you receive from last command
preg_match_all('/<h3 class="r">.*</h3>/Usi', , ); // scrape h3 tags from div ires, preg_match_all - because div have many h3 tags
var_dump(); // look result

Divide and Conquer!

Another way hxxp://php.net/manual/en/book.dom.php you can use DOM model.

About Regular Expression you can look it hxxp://php.net/manual/en/book.pcre.php or book "Mastering Regular Expressions" Jeffrey Friedl.

Regular-Expressions.info - Regex Tutorial, Examples and Reference - Regexp Patterns is the best website for Regex. They truly deserve the backlink!

Also, be careful with google HTML, some of the class and id identifiers do not have quotes.

I use this to scrape webpages, but it will fail on google because of the above reason. I had to write a regex to add quotes to all unquoted identifiers....

PHP Simple HTML DOM Parser

This library works great if you master it.

for geeks:
HTML is not "context free" (Context-free grammar - Wikipedia, the free encyclopedia) so it is not optimal for regex processing. You should use DOM or XML tools if they are available.

I do use regex for html when I work in .net. You have to be careful though about spacing and bad tags.