Get all $_POST variables starting with certain text

Question

I have an html form with a section that generates inputs with random names.

Each input name is generated with the text "book" at the beginning and random text at the end.

<input type="text" name="book_4552f" /> <input type="text" name="book_3507p" /> <input type="text" name="book_8031b" /> 

How do I use PHP to get all $_POST variables which start with the text "book"?

Answer 1

The following uses strpos() to check that the POST string begins with book_

foreach($_POST as $key => $value) {     if (strpos($key, 'book_') === 0) {         // value starts with book_     } }