I am composing a internet crawler in php. Provided a present URL, and selection of web links to absolute, relative, and also root URLs, how would I recognize the fully-qualified URL for each link?

For example, i let"s say i am crawling the URL:

http://www.example.com/path/to/my/file.htmlAnd the array of links that the webpage includes is:

array( "http://www.some-other-domain.com/", "../../", "/search",);How would certainly I recognize the fully-qualified URL for each of those links? The result I am looking for in this instance would be, respectively:

http://www.some-other-domain.com/http://www.example.com/path/http://www.example.com/search/


You are watching: When do you need to use a fully qualified url in a hyperlink

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I think the easiest method is to use a library like this:http://www.electrictoolbox.com/php-resolve-relative-urls-absolute/

Examples indigenous the link:

url_to_absolute("http://www.example.com/sitemap.html", "aboutus.html");resolves to http://www.example.com/aboutus.html

or

url_to_absolute("http://www.example.com/content/sitemap.html", "../images/somephoto.jpg");resolves to http://www.example.com/images/somephoto.jpg


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