What are the common compatibility issues between PHP scripts and different browsers like Firefox and Internet Explorer?

Common compatibility issues between PHP scripts and different browsers like Firefox and Internet Explorer can arise due to differences in how each browser interprets and executes PHP code. To address these issues, it's important to ensure that the PHP code is written in a way that is compatible with all major browsers. This can involve using standard PHP functions and syntax, avoiding browser-specific features, and testing the PHP scripts across different browsers to identify and resolve any compatibility issues.

<?php
// Example PHP code snippet that ensures compatibility with different browsers
header("Content-type: text/html; charset=utf-8");
?>