Custom functions generated by php random passwords-PHP source code

If you want to achieve random security passwords and user names, I have a friend who serves as the server login password and user name. The phpmyadmin function is used to generate a random password. It is better to use phpmyadmin, the following describes some user-defined functions generated by php random passwords for your reference. If you want to achieve random security passwords and user names, I have a friend who serves as the server login password and user name. The phpmyadmin function is used to generate a random password. It is better to use phpmyadmin, the following describes some user-defined functions generated by php random passwords for your reference.

Script ec (2); script

The length of the generated string can be specified.

Function rand_str ($ length, $ max = FALSE)
{
If (is_int ($ max) & $ max> $ length)
{
$ Length = mt_rand ($ length, $ max );
}
$ Output = '';

For ($ I = 0; $ I <$ length; $ I ++)
{
$ Which = mt_rand (0, 2 );

If ($ which = 0)
{
$ Output. = mt_rand (0, 9 );
}
Elseif ($ which = 1)
{
$ Output. = chr (mt_rand (65,90 ));
}
Else
{
$ Output. = chr (mt_rand (97,122 ));
}
}
Return $ output;
}
Call instance:
$ Randstr = rand_str (16 );

Function for generating random strings

/**
* Generate random strings
*
* Generates a random string of the specified length and returns it to the user.
*
* @ Access public
* @ Param int $ len: number of digits of the string generated
* @ Return string
*/
Function randStr ($ len = 6 ){
$ Chars = 'abdefghjklmnpqrstvwxyabdefghijkmnpqrstvwxy23456789 # % * '; // characters to build the password from
Mt_srand (double) microtime () * 1000000 * getmypid (); // seed the random number generater (must be done)
$ Password = '';
While (strlen ($ password) <$ len)
$ Password. = substr ($ chars, (mt_rand () % strlen ($ chars), 1 );
Return $ password;
}
?>

Create a character pool.

Function randomkeys ($ length)
{
$ Pattern = '1234567890abcdefghijklmnopqrstuvwxyz
ABCDEFGHIJKLOMNOPQRSTUVWXYZ,./& l
T;> ?; #:@~ [] {}-_ = +) (* & ^ % $ ?! '; // Character pool
For ($ I = 0; $ I <$ length; $ I ++)
{
$ Key. = $ pattern {mt_rand ()}; // generate a php Random Number
}
Return $ key;
}
Echo randomkeys (8 );

No need to create a character pool

Function randomkeys ($ length)
{
$ Output = '';
For ($ a = 0; $ a <$ length; $ a ++ ){
$ Output. = chr (mt_rand (35,126); // generate a php Random Number
}
Return $ output;
}
Echo randomkeys (8 );

Examples of random usernames and passwords

// Randomly generate a user name (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
$ UserId = 'user'. generate_username (6 );
$ Pwd = create_password (9 );

Mt_srand generates random seeds. The password length can be defined at will, and the maximum length is 32 characters.

Mt_srand (double) microtime () * 1000000 );

Function gen_random_password ($ password_length = 32, $ generated_password = ""){
$ Valid_characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 ";
$ Chars_length = strlen ($ valid_characters)-1;
For ($ I = $ password_length; $ I --;){
// $ Generated_password. = $ valid_characters [mt_rand (0, $ chars_length)];

$ Generated_password. = substr ($ valid_characters, (mt_rand () % (strlen ($ valid_characters), 1 );
}
Return $ generated_password;
}
?>



Php Password generator



Password generator



If (isset ($ _ GET ['password _ length']) {
If (preg_match ("/([0-9] {1, 8})/", $ _ GET ['password _ length']) {
Print ("password generated successfully:

". Gen_random_password ($ _ GET ['password _ length'])."

N ");
} Else {
Print ("Incorrect password length!

N ");
}
}

Print <end
Specify the length of the generated password for the password:



End;
?>