How can saving PHP files as UTF-8 BOM lead to display issues in browsers like Mozilla Firefox?

Saving PHP files as UTF-8 BOM can lead to display issues in browsers like Mozilla Firefox because the Byte Order Mark (BOM) can interfere with the correct interpretation of the PHP code. To solve this issue, you should save PHP files as UTF-8 without BOM to ensure proper rendering in browsers.

// Save PHP files as UTF-8 without BOM to prevent display issues in browsers like Mozilla Firefox