Php random password generation function (four models)

The following provides four php functions for generating random passwords. The simple and practical method is a user-defined encryption function, which is difficult to crack if you do not know your encryption algorithm. Method 1: Copy the code as follows...

The following provides four php functions for generating random passwords. The simple and practical method is a user-defined encryption function, which is difficult to crack if you do not know your encryption algorithm.

Method 1

The code is as follows:

Function generate_password ($ length = 8 ){ // 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; }

Method 2

Generate 6-digit, letter, and hybrid passwords

The code is as follows:

$ Str = "0123456789 abcdefghijklmnopqrstuvwxyz"; // output character set $ N = 6; // output string length $ Len = strlen ($ str)-1; For ($ j = 0; $ j <200; $ j ++ ){ For ($ I = 0; $ I <$ n; $ I ++ ){ $ S. = $ str [rand (0, $ len)]; } Echo $ s ." "; $ S = ""; } ?> Automatically Generate passwords for numbers, letters, and symbols $ A = "12345678 "; $ B = "abcdefghijklmnopqistuvwxyz "; $ S = substr (str_shuffle ($ a), 0, 2 ); $ E = substr (str_shuffle ($ B), 0, 2 ); Echo $ s. substr (str_shuffle ("! @ # $ % ^ & * "), 0, 2). $ e; ?>

Method 3

The code is as follows:
Function create_password ($ pw_length = 8) { $ Randpwd = ''; For ($ I = 0; $ I <$ pw_length; $ I ++) { $ Randpwd. = chr (mt_rand (33,126 )); } Return $ randpwd; } // Call this function to pass the length parameter $ pw_length = 6 Echo create_password (6 );

Method 3

The code is as follows:

Function getmicrotime () { List ($ usec, $ sec) = explode ("", microtime ()); Return (float) $ usec + (float) $ sec ); } // Record start time $ Time_start = getmicrotime (); // Put the php code to be executed here, for example: // Echo create_password (6 ); // Record end time $ Time_end = getmicrotime (); $ Time = $ time_end-$ time_start; // Output the total running time Echo "execution time $ time seconds "; ?>

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