Webscraping Techniques using PHP or Python
I've done this a few ways.
1: with grep, sed, and awk. This is about the same as 2: regex. These methods are very direct, but fail whenever the HTML structure of the site changes.
3: PHP's XML/HTML parser DomDocument. This is far more reliable than regex, but I found it annoying to work with (I hate the mixture of PHP arrays and objects). If you want to use PHP, PHPQuery is probably a good solution, as Thai suggested.
4: Python and BeautifulSoup. I can't say enough good things about BeautifulSoup, and this is the method I recommend. I found my code feels cleaner in Python, and BeautifulSoup was very easy and efficient to work with. Good documentation, too.
You will have to specialize your script for each site. It depends on what sort of information you wish to extract. If it was something standard like body title, of course you wouldn't have to change anything, but it's likely the info you want is more specific?
I need to scrape about 100 websites that are very similar in the content that they provide.
My first doubt. Should be possible to write a generic script to scrape all the 100 websites or in scraping techniques is only possible to write scripts for particular websites. (Dumb question.). I think I should ask what possibility is easier. Write 100 different scripts for each website is hard.
Second question. My primary language is PHP, but after searching here on Stackoverflow I found that one of the most advanced scrapers is "Beautiful Soup" in Python. Should be possible to make calls in PHP to "Beautiful Soup" in Python? Or should be better to do all the script in Python?
Give me some clues on how should I go.
Sorry for my weak english.
Best Regards,