https://www.php.net/manual/de/intlchar.chardigitvalue.php
PHP: IntlChar::charDigitValue - Manual
Get the decimal digit value of a decimal digit character
phpmanual
https://www.php.net/manual/uk/intlchar.chardigitvalue.php
PHP: IntlChar::charDigitValue - Manual
Get the decimal digit value of a decimal digit character
phpmanual
https://www.php.net/manual/en/intlchar.chardigitvalue.php
PHP: IntlChar::charDigitValue - Manual
Get the decimal digit value of a decimal digit character
phpmanual