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<?php public function sanitiseFilename($input) { // // See #3271 // Code from http://stackoverflow.com/a/2021729/3929494 // // Remove anything which isn't a word, whitespace, number // or any of the following characters -_~,;:[](). // If you don't need to handle multi-byte characters // you can use preg_replace rather than mb_ereg_replace // Thanks @Łukasz Rysiak! $output = mb_ereg_replace("([^\w\s\d\-_~,;:\[\].])", '', $input); // Remove any runs of periods (thanks falstro!) $output = mb_ereg_replace("([\.]{2,})", '', $output); // Remove any runs of spaces, e.g. " / " becomes " " which is ugly $output = mb_ereg_replace(" ", " ", $output); return $output; } echo sanitiseFilename("BBC/TVL") . PHP_EOL; echo sanitiseFilename("This%%% is an an$57noy£ing string/ to / use") . PHP_EOL; ?>