What is the purpose of using mb_detect_encoding() in PHP and what parameter does it expect?

The purpose of using mb_detect_encoding() in PHP is to detect the character encoding of a given string. This function can be useful when working with multibyte strings in different encodings and you need to determine the encoding in order to handle the string correctly. The function expects a string as its parameter.

// Example of using mb_detect_encoding() to determine the encoding of a string
$string = "Hello, こんにちは";
$encoding = mb_detect_encoding($string);

echo "The encoding of the string is: " . $encoding;