class Patch {

private $_code;

public function __construct($include_file = null) {
    if ( $include_file ) {
        $this->includeCode($include_file);
    }
}

public function setCode($code) {
    $this->_code = $code;
}

public function includeCode($path) {

    $fp = fopen($path,'r');
    $contents = fread($fp, filesize($path));
    $contents = str_replace('','',$contents);
    fclose($fp);        

    $this->setCode($contents);
}

function redefineFunction($new_function) {

    preg_match('/function (.+)\(/', $new_function, $aryMatches);
    $func_name = trim($aryMatches[1]);

    if ( preg_match('/((private|protected|public) function '.$func_name.'[\w\W\n]+?)(private|protected|public)/s', $this->_code, $aryMatches) ) {

        $search_code = $aryMatches[1];

        $new_code = str_replace($search_code, $new_function."\n\n", $this->_code);

        $this->setCode($new_code);

        return true;

    } else {

        return false;

    }

}

function getCode() {
    return $this->_code;
}
}