META-tags The really important META tags for your web site to be found by the major search engines.
Search Engine Heat Map A visualization of the attention people give different parts of the screen when using a search engine.
Web Catalogues Online Catalogues to add your web sites to and collect backlinks from them. Using the list, you can also note when you added your sites to the catalogue, so you avoid visiting the same catalogue twice. To store the values you input, the script uses only Cookies, so none of your data is stored on my server.
CGI Environment Variables The environment variables passed by the server to the CGI language. PHP accesses these values by the superglobal $_SERVER['VARIABLE_NAME']. Perl accesses the environment variables by the hash %env, e.g. $env{'VARIABLE_NAME'}.
HTTP Header Status Codes A list of all Status Response Codes of the HTTP protocol. These codes are sent from the server to a requesting client (e.g. a web browser) as a reply to a request made. To send such a code using PHP, use the function header('Status: 123 Named Code'); before sending any part of the HTML page itself.
Cronjob A short tutorial about cronjob setup on Unix or Linux systems. Only gives a brief overview on how to add Cronjobs to the Crontab file on Unix-based operating systems.
