php generate unique number

PHP implementation to generate unique membership card number, PHP implementation of membership card In the case of not querying the database, each member login will generate a digital letter combination of non-repeating membership card number. As

This article mainly introduces how to generate a unique number in PHP. in this article, convert the hexadecimal value to 36 to obtain more than 60 million unique numbers that are not repeated, with the number of digits being 10 digits, if you need a

When each member logs in and queries the database, a group of numbers or membership card numbers that do not overlap with letters are generated. Next, we will show you a small program, generate a unique membership card number based on php. if you

When we want to numbers a large number of data, there is a limit on the number of digits, such as a five-digit license plate number, a ten-digit license number, order serial number, and a short URL, we can use the 36-digit system to calculate

This article mainly introduces the generation of unique membership card based on PHP, interested in the reference of friends, I hope to be helpful to everyone. In the case of not querying the database, each member login will generate a digital

We will 0-z (0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ) represent the value 0-35, such as the letter Z for 35. So I'm going to get a 5 digit number, the maximum amount of information is 36 of 5 square, 36^5 = 60466176, that is, the largest 5-bit number

A summary of how PHP generates a unique order number. PHP generates a unique order number. The first code is as follows: returndate (Ymd ). str_pad (mt_rand (1,99999), 5, 0, STR_PAD_LEFT); the second code is as follows: returndate (Ymd ). summary of

Do you need to use rand to generate a random number and then go to the database to query whether there is such a number? It seems a little time-consuming. Is there any other way? Do you need to use rand to generate a random number and then go to the

PHP generates a unique membership card number, and php implements membership card. PHP generates a unique membership card number. php generates a unique membership card number without querying the database. Results: PHP generates a unique membership

PHP generates unique number 36 binary non-repeating numberThe PHP implementation generates a unique number, using the 10 binary conversion 36 binary to get the unique number of 6000多万个, the number of digits is 10 bits.When a large number of data to