@Immutable
    public static Memory chunk_split(Environment env, TraceInfo trace, String body, int chunkLen) {
        return chunk_split(env, trace, body, chunkLen, "\r\n");
    }
Parses the cslashes bitmap returning an actual bitmap.

@param charset the bitmap string

@return the actual bitmap
exts/jphp-zend-ext/src/main/java/org/develnext/jphp/zend/ext/standard/StringFunctions.java