How PHP Gets the values of multiple input elements with the same name in the form

Sometimes the foreground page allows you to dynamically add/Remove multiple values for an attribute, such as adding a book to a bookshelf, to dynamically add or delete a book.

There will be multiple input elements in the form on the foreground page, as follows:

<form action= "a.php" > <input type= "text" name= "books[" "/> <input type=" text "Name=" books[] "/> < Input type= "text" Name= "books[]"/> <input type= "Submit" name= "Submit"/> </form>

When the a.php page receives the form data, it can take advantage of $books = $_request[' books ') and get an array of all titles.