Online PHP editor | output for f4TEh

<?php function unicode2utf8($c){ $output=""; if($c < 0x80) { return chr($c); } else if($c < 0x800) { return chr( 0xc0 | ($c >> 6) ).chr( 0x80 | ($c & 0x3f) ); } else if($c < 0x10000) { return chr( 0xe0 | ($c >> 12) ).chr( 0x80 | (($c >> 6) & 0x3f) ).chr( 0x80 | ($c & 0x3f) ); } else if($c < 0x200000) { return chr(0xf0 | ($c >> 18)).chr(0x80 | (($c >> 12) & 0x3f)).chr(0x80 | (($c >> 6) & 0x3f)).chr(0x80 | ($c & 0x3f)); } return false; } function sanitizeFileName( $name ) { $invalidCharacters = array("\x2f", "\x22", "\x2a", "\x3a", "\x3c", "\x3e", "\x3f", "\x5c", "\x7f"); $name = str_replace($invalidCharacters, '', $name); $name = preg_replace('/[\x{0000}-\x{001F}]/u', '', $name); $name = preg_replace('/[\x{0080}-\x{009F}]/u', '', $name); $name = preg_replace('/[\x{E000}-\x{F8FF}]/u', '', $name); $name = preg_replace('/[\x{FDD0}-\x{FDEF}]/u', '', $name); $name = preg_replace('/[\x{FFF0}-\x{FFFF}]/u', '', $name); return $name; } $str = "blablabla ǹéñ~# - ".unicode2utf8(0xE001).' - '.unicode2utf8(0xFDD3).' - '.unicode2utf8(0xFD00); var_dump($str); var_dump(sanitizeFileName($str));