That's right, that's what's called the "URL Query string".
At the beginning of the web page addresses contained the hierarchical structure of the site directories. For example:
These sites were static: unless the administrator modifies the pages they would always show the same content to the visitors.
Later dynamic sites appeared. In this case, the server automatically creates the page when the browser requests it. For this it uses a series of parameters or data that are included in the URL. These are usually composed of a name and a value separated by the equal sign. An example of a dynamic address would be:
The? "" is used to split the URL of the Query string. The Query string is basically a list of variables and their values.
To be more precise, in the URL that you are, it will go but with the parameters:
- load, that its value is 'create'
< a href="?cargar'='crear">Registrar < /a>
leaving for example as a result