<?php

class PWImage {



    //instantiate class

    //$filename : the path+filename of the written png file

    //$string   : the text that you want to have in the image

    //$fact     : a magnification factor. play with values>2

    //$bcol     : the background colour, R, G, B (0-255)

    //$fcol     : the foreground colour, R, G, B (0-255)

    function PWImage($filename, $string, $fact, $bcol, $fcol) {

        $font = 5;

        $cosrate = rand(10,19);

        $sinrate = rand(10,18);

       

        $charwidth = imagefontwidth($font);

        $charheight = imagefontheight($font);

        $width=(strlen($string)+2)*$charwidth;

        $height=2*$charheight;



        $im = @imagecreatetruecolor($width, $height) or die("Cannot Initialize new GD image stream");

        $im2 = imagecreatetruecolor($width*$fact, $height*$fact);

        $bcol = imagecolorallocate($im, $bcol[0], $bcol[1], $bcol[2]);

        $fcol = imagecolorallocate($im, $fcol[0], $fcol[1], $fcol[2]);



        imagefill($im, 0, 0, $bcol);

        imagefill($im2, 0, 0, $bcol);



        $dotcol = imagecolorallocate($im, (abs($this->getR($fcol)-$this->getR($bcol)))/2.5,

                                          (abs($this->getG($fcol)-$this->getG($bcol)))/2.5,

                                          (abs($this->getB($fcol)-$this->getB($bcol)))/2.5);



        $dotcol2 = imagecolorallocate($im, (abs($this->getR($fcol)-$this->getR($bcol)))/1.5,

                                           (abs($this->getG($fcol)-$this->getG($bcol)))/1.5,

                                           (abs($this->getB($fcol)-$this->getB($bcol)))/3.5);



        $linecol = imagecolorallocate($im, (abs($this->getR($fcol)-$this->getR($bcol)))/2.4,

                                           (abs($this->getG($fcol)-$this->getG($bcol)))/2.1,

                                           (abs($this->getB($fcol)-$this->getB($bcol)))/2.5);



        for($i=0; $i<$width; $i=$i+rand(1,5)) {

            for($j=0; $j<$height; $j=$j+rand(1,5)) {

                imagesetpixel($im, $i, $j, $dotcol);

            }

        }



        imagestring($im, $font, $charwidth, $charheight/2, $string, $fcol);



        for($j=0; $j<$height*$fact; $j=$j+rand(3,6)) {

            imageline($im2, 0, $j, $width*$fact, $j, $linecol);

        }



        for($i=0; $i<$width*$fact; $i=$i+rand(4,9)) {

            imageline($im2, $i, 0, $i, $height*$fact, $linecol);

        }



        for($i=0; $i<$width*$fact; $i++) {

            for($j=0; $j<$height*$fact; $j++) {

            $x = abs(((cos($i/$cosrate)*5+sin($j/$sinrate*2)*2+$i)/$fact))%$width;

                $y = abs(((sin($j/$sinrate)*5+cos($i/$cosrate*2)*2+$j)/$fact))%$height;

                $col = imagecolorat($im, $x, $y);

                if ($col!=$bcol) imagesetpixel($im2, $i, $j, $col);

            }

        }

   

        for($j=0; $j<$height*$fact; $j=$j+rand(1,5)) {

            for($i=0; $i<$width*$fact; $i=$i+rand(1,5)) {

                imagesetpixel($im2, $i, $j, $dotcol2);

            }

        }



        ob_start();

        imagepng($im2);

        $buffer = ob_get_contents();

        ob_end_clean();

        $handle = fopen($filename, "w");

        fwrite($handle, $buffer);

        fclose($handle);



        imagedestroy($im);

        imagedestroy($im2);

    }

   

    //functions to extract RGB values from combined 24bit color value

    function getR($col) {return (($col >> 8) >> 8) % 256;}

    function getG($col) {return ($col >> 8) % 256;}

    function getB($col) {return $col % 256;}



}   



//**********************************************

//*************** example use ******************

//**********************************************



$grab="Starfish";



$pw = new PWImage("temp1.png", $grab, 2, array(0, 0, 0), array(255, 128, 200));

$pw = new PWImage("temp2.png", sha1($grab), 2, array(255, 255, 255), array(0, 0, 0));

$pw = new PWImage("temp3.png", md5($grab), 2, array(0, 0, 0), array(255, 228, 250));

$pw = new PWImage("temp4.png", crypt($grab), 2, array(0, 0, 0), array(0, 255, 255));



echo "<img src='temp1.png'/><br/><img src='temp2.png'/><br/><img src='temp3.png'/><br/><img src='temp4.png'/><br/>";



?>