What role does the HTTP header play in handling UTF-8 encoding in PHP?

When handling UTF-8 encoding in PHP, it is important to ensure that the HTTP header specifies the correct charset as UTF-8. This helps browsers interpret the content correctly and display special characters properly. To set the charset in the HTTP header, you can use the header() function in PHP. 

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

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HTTP header UTF-8 encoding PHP handling character encoding

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