Why does the presence of a Byte Order Mark (BOM) impact the functionality of the header() function in PHP?

The presence of a Byte Order Mark (BOM) at the beginning of a PHP file can cause headers to be sent prematurely, leading to errors when using the header() function in PHP. To solve this issue, you can ensure that there is no BOM present at the beginning of your PHP files by saving them without the BOM in your text editor.

// Ensure that there is no Byte Order Mark (BOM) present at the beginning of the PHP file
// This can be achieved by saving the file without the BOM in your text editor

// Your PHP code here