public static Memory md5_file(Environment env, TraceInfo trace, String fileName) {
        return md5_file(env, trace, fileName, false);
    }
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