Why is it important to specify the correct character encoding in the HTTP header when dealing with character display issues in PHP?

When dealing with character display issues in PHP, it is important to specify the correct character encoding in the HTTP header to ensure that the browser interprets the characters correctly. If the encoding is not specified or incorrect, special characters may not display properly, leading to garbled text or question marks. By setting the correct character encoding in the HTTP header, you can ensure that the browser understands how to interpret and display the characters in your PHP script.

header('Content-Type: text/html; charset=UTF-8');