How can I remove the NULL character from string

Question

I have a PHP variable that contains a string which represents an XML structure. This string contains ilegal characters that dont let me build a new SimpleXMLElement object f

Answer 1

trim() will also remove null characters, from either end of the source string (but not within).

$text = trim($text);

I've found this useful for socket server communication, especially when passing JSON around, as a null character causes json_decode() to return null.