How can PHP developers ensure maximum compatibility and readability by using PHP open and close tags instead of ASP tags or <script language="php"> tags?

Using PHP open and close tags (`<?php ?>`) ensures maximum compatibility and readability across different servers and environments compared to ASP tags or `<script language="php">` tags. It is the standard way of delimiting PHP code and is supported by all PHP versions. By sticking to PHP open and close tags, developers can avoid potential issues with other tag types and maintain a consistent coding style.

<?php
// Your PHP code here
?>