In the generally accepted definition, a 301 error is a permanent redirect that indicates that the resource has been moved to a different URL and communicates to search engines and clients that an update of greece phone number the indexes and cache is needed , so that everyone has the new address.
The error then stimulates the updating of URLs and allows users who perform online searches to find exactly what they are looking for, in the place where they need to find it. They are useful, for example, when a website changes domain and there is a need to move large resources without necessarily having to copy and paste to create them from scratch.
Another situation where 301 codes and redirects are used very often is when the structure of the website has changed and therefore the URLs of the contents. The systems for implementing the 301 code are different and it is even possible to go through JavaScript .
Although many times this is a solution that is recommended only for temporary changes and are, compared to server-side changes, a little slower because they imply that the client executes the JavaScript code to be able to reach the new URL. More convenient are therefore the redirects to be performed in Apache or inside PHP. These are the 301 codes.
308 and 301, how to use redirects – sos-wp.it
Let's try to understand the difference with 308 codes . 308 codes also indicate a redirect and 308 codes also serve to signal the permanent move of a resource to a new URL. In this codes 308 and 301 are equivalent.
The difference comes from the fact that the 308 code does not push on the cache or on the index . It can therefore be used for those cases in which clients cannot update these elements autonomously. Its purpose is to signal that all possible requests for the resource that should be found in a certain URL must be made to another address.
As we mentioned, however, this is a code that has its usefulness but may not be compatible with all situations that can be generated online. It must therefore be evaluated on a case-by-case basis. The 308 code can also be implemented using Apache, PHP and even JavaScript.