- substr: documentation ( source)
- var_dump: documentation ( source)
- str_repeat: documentation ( source)
<?php
function ccMasking($number, $maskingCharacter = 'X') {
return substr($number, 0, 4) . str_repeat($maskingCharacter, strlen($number) - 8) . substr($number, -4);
}
var_dump(ccMasking('Johannes Eriksson'));