This tutorial I will be showing you how to create a random password using nothing but loops and random letters. For extra security I will define a minimum length and a maximum length, I will also make it so you can't define a password from using the url.
First we need to define everything. This includes the min length, max length and emptying the password:
Code:
| $min=4;
$max=15; $pwd=""; |
Now we need to start the loop of creating it, using the $min and $max we can get a random length:
Code:
| for($i=0;$i<rand($min,$max);$i++)></rand($min,$max);$i++)> |
We need to get a load of letters now, but we have to be sure there are valid letters and not other characters:
Code:
| $num=rand(48,122);
if(($num > 97 && $num < 122)) { $pwd.=chr($num); } else if(($num > 65 && $num < 90)) { $pwd.=chr($num); } else if(($num >48 && $num < 57)) { $pwd.=chr($num); } else if($num==95) { $pwd.=chr($num); } |
Just a load of checking, nothing much really there. Because this is a tutorial, we would output the result of our password:
Code:
| echo $pwd; |
Be carefull about including that line for the final script. If you are emailing the password then you don't need it, you decide.
The complete code is here:
Code:
| <?php
// filename "pword.php" $min=4; // minimum length of password $max=15; // maximum length of password $pwd=""; // to store generated password for($i=0;$i<rand($min,$max);$i++) { $num=rand(48,122); if(($num > 97 && $num < 122)) { $pwd.=chr($num); } else if(($num > 65 && $num < 90)) { $pwd.=chr($num); } else if(($num >48 && $num < 57)) { $pwd.=chr($num); } else if($num==95) { $pwd.=chr($num); } else { $i--; } } echo $pwd; // prints the password ?> |
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