Home > Article > Daily Programming > What is the main function of url
Recommended tutorial：H5 tutorial
##URL is the abbreviation of Uniform Resource Loctor
URL function: It can be reached through the URL Find what you need anywhere, such as files, databases, images, newsgroups, etc. It can be said that URL is the address book on the Internet.
A complete URL includes: protocol part, domain name part, port part, virtual directory part, file name part, parameter part, anchor part
1. Protocol part: The protocol part of the URL is "http:", which means that the web page uses the HTTP protocol. Various protocols can be used on the Internet, such as HTTP, FTP, etc. In this example, the HTTP protocol is used. The "//" after "HTTP" is the delimiter
2. Domain name part: The domain name part of the URL is "www .aspxfans.com”. In a URL, you can also use the IP address as the domain name
3. Port part: Following the domain name is the port and the domain name Use ":" as the separator between the port and the port. The port is not a required part of a URL. If the port part is omitted, the default port
will be used. 4. Virtual directory part: after the domain name Starting from the first "/" to the last "/" is the virtual directory part. The virtual directory is also not a required part of a URL. The virtual directory in this example is "/news/"
5. File name part: From the last "/ after the domain name "Starts to "?", which is the file name part. If there is no "?", it starts from the last "/" after the domain name and ends with "#", which is the file part. If there is no "?" and "#" , then starting from the last "/" after the domain name to the end is the file name part. The file name in this example is "index.asp". The file name part is not a required part of a URL. If this part is omitted, the default file name
will be used. 7. Parameter part: The part starting from "?" to "#" is the parameter part, also known as the search part and the query part. The parameter part in this example is "boardID=5&ID=24618&page=1". Parameters can allow multiple parameters, and "&" is used as a separator between parameters.
8. Anchor part: HTTP request does not include the anchor part, starting from "#" to the end, it is the anchor part. The anchor part in this example is "r_70732423". The anchor part is also not a required part of a URL.
Anchor point function: Scroll to the anchor point position when opening the user page. For example: There is a piece of code in an html page. The hash of the url is r_70732423
<div name='r_70732423'>...</div>
. Open the above url and scroll to name=’r_70732423’
The above is the detailed content of What is the main function of url. For more information, please follow other related articles on the PHP Chinese website!