How can the code snippet provided be improved to handle special characters like umlauts in names while still validating for alphanumeric characters in PHP?

The issue can be solved by using the `preg_match` function with the appropriate regular expression pattern to allow alphanumeric characters as well as special characters like umlauts in names. By modifying the regular expression pattern to include the Unicode character range for umlauts, the code snippet can be improved to handle special characters while still validating for alphanumeric characters in PHP. 

$name = "Jürgen Müller";

if (preg_match('/^[\p{L}0-9 ]+$/u', $name)) {
    echo "Name is valid.";
} else {
    echo "Name contains invalid characters.";
}

Keywords

UTF-8 htmlspecialchars mb_convert_encoding regex preg_match

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