How can PHP developers effectively debug their scripts when dealing with issues related to HTML output and browser display discrepancies?

To effectively debug HTML output and browser display discrepancies in PHP scripts, developers can use tools like browser developer tools to inspect the generated HTML code, check for syntax errors in PHP scripts, and ensure proper handling of HTML tags and attributes. Additionally, developers can use PHP functions like `var_dump()` or `echo` statements to print out variables and values for debugging purposes.

<?php
// Sample PHP script with HTML output
$name = "John Doe";
echo "<h1>Hello, $name!</h1>";
?>