Question

I’ve been racking my brain and scavenging the internet for over an hour now…

Im looking for a function in PHP simular to “trim” but one that removes any character except those in a given list, for example;

$niceChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_+";
$rawString = "myString";
$happyString = removeNastyNess($rawString, $niceChars);

Does any such function exist?

Answer 1

Without reg exp:

function removeNastyNess($rawString, $niceChars) {
    return implode('', array_intersect(str_split($rawString), str_split($niceChars)));
}