将一个字符串部分字符用*替代隐藏

╰+攻爆jí腚メ 2022-05-15 02:35 192阅读 0赞

/**
    +----------------------------------------------------------
     * 将一个字符串部分字符用*替代隐藏
    +----------------------------------------------------------
     * @param string    $string   待转换的字符串
     * @param int       $bengin   起始位置，从0开始计数，当$type=4时，表示左侧保留长度
     * @param int       $len      需要转换成*的字符个数，当$type=4时，表示右侧保留长度
     * @param int       $type     转换类型：0，从左向右隐藏；1，从右向左隐藏；2，从指定字符位置分割前由右向左隐藏；3，从指定字符位置分割后由左向右隐藏；4，保留首末指定字符串
     * @param string    $glue     分割符
    +----------------------------------------------------------
     * @return string   处理后的字符串
    +----------------------------------------------------------
     */
    function hideStr($string, $bengin = 0, $len = 4, $type = 0, $glue = "@") {
        if (empty($string))
            return false;
        $array = array();
        if ($type == 0 || $type == 1 || $type == 4) {
            $strlen = $length = mb_strlen($string);
            while ($strlen) {
                $array[] = mb_substr($string, 0, 1, "utf8");
                $string = mb_substr($string, 1, $strlen, "utf8");
                $strlen = mb_strlen($string);
            }
        }
        switch ($type) {
            case 1:
                $array = array_reverse($array);
                for ($i = $bengin; $i < ($bengin + $len); $i++) {
                    if (isset($array[$i]))
                        $array[$i] = "*";
                }
                $string = implode("", array_reverse($array));
                break;
            case 2:
                $array = explode($glue, $string);
                $array[0] = hideStr($array[0], $bengin, $len, 1);
                $string = implode($glue, $array);
                break;
            case 3:
                $array = explode($glue, $string);
                $array[1] = hideStr($array[1], $bengin, $len, 0);
                $string = implode($glue, $array);
                break;
            case 4:
                $left = $bengin;
                $right = $len;
                $tem = array();
                for ($i = 0; $i < ($length - $right); $i++) {
                    if (isset($array[$i]))
                        $tem[] = $i >= $left ? "*" : $array[$i];
                }
                $array = array_chunk(array_reverse($array), $right);
                $array = array_reverse($array[0]);
                for ($i = 0; $i < $right; $i++) {
                    $tem[] = $array[$i];
                }
                $string = implode("", $tem);
                break;
            default:
                for ($i = $bengin; $i < ($bengin + $len); $i++) {
                    if (isset($array[$i]))
                        $array[$i] = "*";
                }
                $string = implode("", $array);
                break;
        }
        return $string;
    }