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  Classes of Kevin Gilbertson  >  PasswordGenerator  >  PasswordGenerator.php  
File: PasswordGenerator.php
Role: Class source
Content type: text/plain
Description: Class to generate random passwords.
Class: PasswordGenerator
Simple class to generate random passwords.
 

Contents

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<?php
/***
* This class is designed to create somewhat random passwords
* to set up initial user accounts where
* you email out the initial login information. 
* 
* Created By: Kevin Gilbertson (kevin@gilbertsonconsulting.com)
* Last Updated: 4/22/02
* Modified By: Flinn Mueller (flinn AT activeintra DOT net)
* Last Updated: 5/01/02
* Modified By: Kevin Gilbertson (kevin@gilbertsonconsulting.com)
* Last Updated: 5/15/02
* Modified By: Kevin Gilbertson (kevin@gilbertsonconsulting.com)
* Last Updated: 11/14/02
***/
class PasswordGenerator
{
    var $passwdchars;
    var $passwd;
    var $length;
    var $minlength;
    var $maxlength;

    function PasswordGenerator($min=6, $max=8, $special=NULL, $chararray=NULL)
    {
        if($chararray == NULL)     {
                 $passwdstr = "abcdefghijklmnopqrstuvwxyz";
                 $passwdstr .= strtoupper($passwdstr);
                 $passwdstr .= "12345678901234567890"; // twice to up the likelyhood
            // add special chars to start
                     if ($special) {
            $passwdstr .= "!@#$%";
                     }
        } else { 
            $passwdstr = $chararray; 
        }

            for($i=0; $i<=strlen($passwdstr) - 1; $i++) {
                $this->passwdchars[$i]=$passwdstr[$i];
            }
             
            // randomize the chars
            srand ((float)microtime()*1000000);
            shuffle($this->passwdchars);

        $this->minlength = $min;
        $this->maxlength = $max;
    }

    function setLength()    // private method
    { $this->length = rand($this->minlength, $this->maxlength); }

    function setMin($min)
    { $this->minlength = $min; }

    function setMax($max)
    { $this->maxlength = $max; }

    function getPassword()
    {
        $this->passwd = NULL; 
        $this->setLength();

        for($i=0; $i<$this->length; $i++)
        {
            $charnum = rand(0, count($this->passwdchars) - 1);
            $this->passwd .= $this->passwdchars[$charnum];
        }

        return $this->passwd; 
    }

    // to show in browser
    function getHTMLPassword()
    {
        return (htmlentities($this->getPassword()));
    }

    // Allows password to be shown as an image
    // Also semi-tempest resistant, with random text position,
    // and nifty gray color which should difuse tempest emissions
    // Created By: Flinn Mueller (flinn AT activeintra DOT net)
    function getImgPassword()
    {
        $RandPassword = $this->getPassword();

        // create the image
        $png = ImageCreate(200,80);
        $bg = ImageColorAllocate($png,192,192,192);
        $tx = ImageColorAllocate($png,128,128,128);
        ImageFilledRectangle($png,0,0,200,80,$bg);
        srand ((float)microtime()*1000000);
        ImageString($png,5,rand(0,90),rand(0,50),$RandPassword,$tx);

        // send the image
        header("content-type: image/png");
        ImagePng($png);
        imagedestroy ($png);
    }
}
?>