PHP code for generating random user names and passwords

Using PHP to generate random numbers can be applied in many places, for example, you can design random passwords for programs, simulate dice games, and Rock Scissors game applications. sometimes we need to use random user names and passwords in applications, this greatly improves application security. you can use the mt_rand function or the rand function to generate random user names and passwords in PHP. The rand function has more applications in the verification code, generally, the growth character random code requires the mt_rand function.

Using PHP to generate random numbers can be applied in many places, such as designing random passwords for programs, simulating dice games, and stone scissors game applications.

The following are two function methods for generating random numbers in PHP:

The code is as follows:
// Automatically generate a random user name for the user (length: 6-13)
Function create_password ($ pw_length = 4 ){
$ Randpwd = '';
For ($ I = 0; $ I <$ pw_length; $ I ++ ){
$ Randpwd. = chr (mt_rand (33,126 ));
}
Return $ randpwd;
}
Function generate_username ($ length = 6 ){
// Password character set, which can be any character you need
$ Chars = 'abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789! @ # $ % ^ & * ()-_ [] {}<> ~ '+ = ,.;:/? | ';
$ Password = '';
For ($ I = 0; $ I <$ length; $ I ++)
{
// Two character acquisition methods are provided here
// Use substr to intercept any character in $ chars;
// The second method is to take any element of the character array $ chars.
// $ Password. = substr ($ chars, mt_rand (0, strlen ($ chars)-1), 1 );
$ Password. = $ chars [mt_rand (0, strlen ($ chars)-1)];
}
Return $ password;
}
// Call this function
$ UserId = 'user'. generate_username (6 );
$ Pwd = create_password (9 );