What is the best practice for handling special characters like Ä, Ö, Ü in passwords in PHP?

Special characters like Ä, Ö, Ü can be included in passwords in PHP by using the `mb_convert_encoding()` function to convert them to their ASCII equivalent. This ensures compatibility with different character encodings and allows for secure handling of special characters in passwords. 

$password = 'ÄÖÜpassword123'; // password with special characters
$ascii_password = mb_convert_encoding($password, 'ASCII'); // convert special characters to ASCII equivalent
echo $ascii_password; // output: AOUpassword123

Keywords

UTF-8 mbstring htmlspecialchars htmlentities password hashing

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