What are the best practices for encoding PHP files to avoid issues with special characters or encoding errors?

When encoding PHP files, it's important to use UTF-8 encoding to avoid issues with special characters or encoding errors. To ensure proper encoding, you can add a UTF-8 encoding declaration at the beginning of your PHP files using the header() function. 

<?php
header('Content-Type: text/html; charset=utf-8');
// Your PHP code here
?>

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Encoding PHP files special characters errors best practices

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