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PHP method to create a unique number class based on an auto-incremented ID
PHP method to create a unique number class based on an auto-incremented ID
This article mainly introduces the relevant knowledge of PHP to create a unique number class based on the self-increasing ID. Has very good reference value. Let’s take a look with the editor below
During the development process, our data tables generally use self-increasing numbers as the primary key of id, and id is a numeric type, which is not easy to understand. After we convert the ID into a number according to a certain format, it is easy to know what the content represents based on the number.
For example, the order table id=20160111197681234, just looking at the id we don’t know that this id is the id of the order table, but it is converted to the number O-20160111197681234, it is easy to see that it is a record of the order table, and then it can be searched in the order table based on the id.
Number creation rules
1. The unique
is generated using an auto-incremented id, guaranteed Uniqueness
2. As short as possible
can be processed by using the remainder of the number and the corresponding letter to create a shorter number
Algorithm principle
1. Add a custom prefix to identify
2. The format is composed of prefix + letters + numbers. Only N digits are reserved for numbers. If there are more than 10 digits, use the remainder method of numbers and use letters to correspond.
For example:
id =1
Prefix=F
The number retains 3 digits
The number created is: F-A-001
The code is as follows:
IDCode.class.PHP
##
<?php
/**
* php 根据自增id创建唯一编号类
* Date: 2016-11-27
* Author: fdipzone
* Ver: 1.0
*
* Func
* Public create 创建编号
*/
class IDCode{ // class start
/**
* 创建编号
* @param Int $id 自增id
* @param Int $num_length 数字最大位数
* @param String $prefix 前缀
* @return String
*/
public static function create($id, $num_length, $prefix){
// 基数
$base = pow(10, $num_length);
// 生成字母部分
$pision = (int)($id/$base);
$word = '';
while($pision){
$tmp = fmod($pision, 26); // 只使用26个大写字母
$tmp = chr($tmp + 65); // 转为字母
$word .= $tmp;
$pision = floor($pision/26);
}
if($word==''){
$word = chr(65);
}
// 生成数字部分
$mod = $id % $base;
$digital = str_pad($mod, $num_length, 0, STR_PAD_LEFT);
$code = sprintf('%s-%s-%s', $prefix, $word, $digital);
return $code;
}
} // class end
?>demo.php
<?php
require 'IDCode.class.php';
$test_ids = array(1,9,10,99,100,999,1000,1009,2099,3999,9999,14999,99999);
foreach($test_ids as $test_id){
echo $test_id.' = '.IDCode::create($test_id, 3, 'F').'<br>';
}
?>1 = F-A-001 9 = F-A-009 10 = F-A-010 99 = F-A-099 100 = F-A-100 999 = F-A-999 1000 = F-B-000 1009 = F-B-009 2099 = F-C-099 3999 = F-D-999 9999 = F-J-999 14999 = F-O-999 99999 = F-VD-999
The above is the entire content of this article, I hope it will be helpful to everyone's study.
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