What are common issues with UTF-8 encoding in PHP and how can they be resolved?

Common issues with UTF-8 encoding in PHP include character encoding mismatches, garbled text, and unexpected behavior when working with multibyte characters. To resolve these issues, it is important to ensure that your PHP files are saved with UTF-8 encoding, set the correct encoding in your HTML meta tags, and use PHP functions like mb_convert_encoding() to handle multibyte characters properly.

// Ensure PHP files are saved with UTF-8 encoding
header('Content-Type: text/html; charset=utf-8');

// Set the correct encoding in HTML meta tags
<meta charset="UTF-8">

// Use mb_convert_encoding() to handle multibyte characters
$text = "こんにちは";
$utf8_text = mb_convert_encoding($text, 'UTF-8', 'auto');
echo $utf8_text;