Overview: Query strings are a way to pass information with a link (url). Let's learn how to use query strings to pass information between PHP pages.
Q: What are querystings
Well querystring's are nothing but ordinary urls that have extra info (data) after the file name (Starts with a ? mark) basically A query string is the extra portion of the URL that appears after the question mark in a URL.
A sample Query String url from PHPBuddy http://www.phpbuddy.com/sub_articles.php?other_articles=10
To explain you I will take an example, we will create 2 pages the first page will have links with query string and the second page with process the info in the query string.
In the above example we have created 3 hyperlinks with querystring "link=one", "link=two", "link=three" now we will create page_two.php where we will retrive the contents of that querystring.
$link = $_GET['link'];
echo "You have clicked $link";
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