PHP uses strings to convert between short URLs and numbers

This article mainly introduces the method of converting between PHP short URLs and numbers, involving the skills of PHP operating strings, and has certain reference value. Friends in need can refer to the following

Examples of this article The method of converting between PHP short URL and numbers.

The specific implementation method is as follows:

<?php
/**
 * 将数字转为短网址代码
 *
 * @param int $number 数字
 * @return string 短网址代码
 */
function generate_code($number) {
  $out  = "";
  $codes = "abcdefghjkmnpqrstuvwxyz23456789ABCDEFGHJKMNPQRSTUVWXYZ";
  while ($number > 53) {
    $key  = $number % 54;
    $number = floor($number / 54) - 1;
    $out  = $codes{$key}.$out;
  }
  return $codes{$number}.$out;
}
/**
 * 将短网址代码转为数字
 *
 * @param string $code 短网址代码
 * @return int 数字
 */
function get_num($code){
  $codes = "abcdefghjkmnpqrstuvwxyz23456789ABCDEFGHJKMNPQRSTUVWXYZ";
  $num = 0;
  $i = strlen($code);
 for($j=0;$j<strlen($code);$j++){
    $i--;
    $char = $code{$j};
    $pos = strpos($codes,$char);
    $num += (pow(54, $i) * ($pos + 1));
  }
  $num--;
  return $num;
}

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