PHP implementation code for generating random usernames and passwords _ PHP Tutorial

PHP code for generating random user names and passwords. Sometimes we need to use a random user name and password in the application, which can greatly improve the security of the application, you can use mt to generate random user names and passwords in PHP. sometimes we need to use random user names and passwords in the application, which greatly improves the security of the application, you can use the mt_rand function or the rand function to generate a random user name and password in PHP. The rand function applies more in the verification code, and the random code of the generated characters generally 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 );

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