PHP generates short links: convert numbers to letters and letters to numbers

 One 、 Base class method ： Define string 、 Write conversion methods 
class NumberHelper
{
    public static $str="abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";

/**
 * Param: Convert a number to a short string 
 * User:  He Chen 
 * Date: 2022/4/11
 * @param $number
 * @return string
 */
public static function generate_code($number) {
    $out  = "";
    $codes = self::$str;
    while ($number > 61) {
        $m = $number % 62;
        $out = $codes[$m].$out;
        $number = ($number - $m) / 62;
    }
    return $codes[$number].$out;
}

/**
 * Param: Convert a short string to a number 
 * User:  He Chen 
 * Date: 2022/4/11
 * @param $string
 * @return float|int
 */
public static function get_num($string){
    $codes = self::$str;
    $num = 0;
    for($i=0;$i<strlen($string);$i++){
        $n = strlen($string) - $i -1;
        $pos = strpos($codes,$string[$i]);
        $num += $pos * pow(62, $n);
    }
    return $num;
}

}

Two 、 Call conversion method , According to your own rules , Generate short links you need

public static function getShotLink($userid,$gid){
        // Get users ID Short string 
        $_uid_str = NumberHelper::generate_code($userid);
        // Access to goods ID Short string 
        $_good_str = NumberHelper::generate_code($gid]);
        // Splice to generate short links 
        $param = '#A='.$_uid_str.'=B='.$_good_str.'#';

                return $param

}

3、 ... and 、 Resolve short link restore parameters

public static function getUnShotLink(ShotLink){
        // Regular matching parsing data 
        $ShotLink = self::pregMatchFeng($params['share_data']);
        $ShotLink = explode('=',str_replace('#','',$ShotLink));
        /* Solution to a number string */
        $uid = NumberHelper::get_num($ShotLink[1]);
        $gid = NumberHelper::get_num($ShotLink[3]);

                // Then write your own logic

                ......

}

/**
 * Param:  Regular matching bee password 
 * User:  He Chen 
 * Date: 2022/4/12
 * @param $data
 * @return array|mixed
 */
public static function pregMatchFeng($data){
    $share_data = [];
    preg_match_all("/#A=[a-zA-Z0-9]*=B=[a-zA-Z0-9]*#/",$data, $matches);
    if (!empty($matches[0][0])) {
        $share_data = $matches[0][0];
    }
    return $share_data;
}