Binary to Text/Text to Binary

<?phpfunction bin2text($bin_str){    $text_str = '';    $chars = explode("\n", chunk_split(str_replace("\n", '', $bin_str), 8));    $_I = count($chars);    for($i = 0; $i < $_I; $text_str .= chr(bindec($chars[$i])), $i  );    return $text_str;}function text2bin($txt_str){    $len = strlen($txt_str);    $bin = '';    for($i = 0; $i < $len; $i  )    {        $bin .= strlen(decbin(ord($txt_str[$i]))) < 8 ? str_pad(decbin(ord($txt_str[$i])), 8, 0, STR_PAD_LEFT) : decbin(ord($txt_str[$i]));    }    return $bin;}?>