PHP Graphics Verification Code class

PHP Graphics Verification Code class

Copy code font file see attachment!

<?php

Session_Start ();

$vi = new Vcodeimage;

$vi->setimage (1,4,65,20,80,1);

Class vcodeimage{

/*******************************************************

**filename:verify_image.php

**copyright:none! (Keep this information, though)

**author:vsfree.com

**date:2007-08-08

********************************************************/

var $mode; 1: Digital mode, 2: Alphabetic mode, 3: Alphanumeric mode, others: Digital letter Optimization Mode

var $v _num; Number of verification codes

var $img _w; Verify Code image width

var $img _h; Authentication Code Image Height

var $int _pixel_num; Number of disturbing pixels

var $int _line_num; Number of interference lines

var $font _dir; Font file relative path

var $border; Image border

var $borderColor; Image border color

function SetImage ($made, $v _num, $img _w, $img _h, $int _pixel_num, $int _line_num, $font _dir= '. /font ', $border =true, $borderColor = ' 255,200,85 ') {

if (!isset ($_session[' Vcode ')) {

Session_register (' Vcode ');

}

$_session[' Vcode ']= ' ";

$this->mode = $made;

$this->v_num = $v _num;

$this->img_w = $img _w;

$this->img_h = $img _h;

$this->int_pixel_num = $int _pixel_num;

$this->int_line_num = $int _line_num;

$this->font_dir = $font _dir;

$this->border = $border;

$this->bordercolor = $borderColor;

$this->generateimage ();

}

function GetChar ($mode) {

if ($mode = = "1") {

$ychar = "0,1,2,3,4,5,6,7,8,9";

}

else if ($mode = = "2") {

$ychar = "A,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z";

}

else if ($mode = = "3") {

$ychar = "0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z";

}

Else

$ychar = "3,4,5,6,7,8,9,a,b,c,d,h,k,p,r,s,t,w,x,y";

return $ychar;

}

function Randcolor ($rs, $re, $gs, $ge, $bs, $be) {

$r = Mt_rand ($rs, $re);

$g = Mt_rand ($gs, $ge);

$b = Mt_rand ($bs, $be);

Return Array ($r, $g, $b);

}

function Generateimage () {

$im = Imagecreate ($this->img_w, $this->img_h);

$black = Imagecolorallocate ($im, 0,0,0);

$white = Imagecolorallocate ($im, 255,255,255);

$bgcolor = Imagecolorallocate ($im, 250,250,250);

Imagefill ($im, 0,0, $bgcolor);

$fonts = Scandir ($this->font_dir);

$fmax = count ($fonts)-2;

$ychar = $this->getchar ($this->mode);

$list = Explode (",", $ychar);

$x = Mt_rand (2, $this->img_w/($this->v_num+2));

$cmax = count ($list)-1;

$v _code = ';

For ($i =0 $i < $this->v_num; $i + +)//Verification Code

{

$randnum = Mt_rand (0, $cmax);

$this _char = $list [$randnum];

$v _code. = $this _char;

$size = Mt_rand (intval ($this->img_w/5), Intval ($this->IMG_W/4));

$angle = Mt_rand ( -20,20);

$y = Mt_rand (($size +2), ($this->img_h-2));

if ($this->border)

$y = Mt_rand (($size +3), ($this->img_h-3));

$rand _color = $this->randcolor (0,200,0,100,0,250);

$randcolor = Imagecolorallocate ($im, $rand _color[0], $rand _color[1], $rand _color[2]);

$fontrand = Mt_rand (2, $fmax);

$font = "$this->font_dir/". $fonts [$fontrand];

Imagettftext ($im, $size, $angle, $x, $y, $randcolor, $font, $this _char);

$x = $x + intval ($this->img_w/($this->v_num+1));

}

For ($i =0 $i < $this->int_pixel_num; $i + +) {//interference pixels

$rand _color = $this->randcolor (50,250,0,250,50,250);

$rand _color_pixel = imagecolorallocate ($im, $rand _color[0], $rand _color[1], $rand _color[2]);

Imagesetpixel ($im, Mt_rand ()% $this->img_w, Mt_rand ()% $this->img_h, $rand _color_pixel);

}

For ($i =0 $i < $this->int_line_num; $i + +) {//Interference line

$rand _color = $this->randcolor (0,250,0,250,0,250);

$rand _color_line = imagecolorallocate ($im, $rand _color[0], $rand _color[1], $rand _color[2]);

Imageline ($im, Mt_rand (0,intval ($this->img_w/3)), Mt_rand (0, $this->img_h), Mt_rand (Intval ($this->img_w-( $this->IMG_W/3)), $this->img_w), Mt_rand (0, $this->img_h), $rand _color_line);

}

if ($this->border)//Draw a border

{

if (Preg_match ("/^d{1,3},d{1,3},d{1,3}$/", $this->bordercolor)) {

$borderColor = Explode (', ', $this->bordercolor);

}

$border _color_line = imagecolorallocate ($im, $borderColor [0], $borderColor [1], $borderColor [2]);

Imageline ($im, 0, 0, $this->img_w, 0, $border _color_line); Upper Horizontal

Imageline ($im, 0, 0, 0, $this->img_h, $border _color_line); Left vertical

Imageline ($im, 0, $this->img_h-1, $this->img_w, $this->img_h-1, $border _color_line); Lower Horizontal

Imageline ($im, $this->img_w-1, 0, $this->img_w-1, $this->img_h, $border _color_line); Right Vertical

}

Imageantialias ($im, true); Anti-aliasing

$time = time ();

$_session[' vcode ' = $v _code. "|". $time; Negative validation code and generation time to $_session[vcode]

Generate images to browsers

if (function_exists ("Imagegif")) {

Header ("Content-type:image/gif");

Imagegif ($im);

}

ElseIf (function_exists ("Imagepng")) {

Header ("Content-type:image/png");

Imagepng ($im);

}

ElseIf (function_exists ("imagejpeg")) {

Header ("Content-type:image/jpeg");

Imagejpeg ($im, "" ", 80);

}

ElseIf (function_exists ("Imagewbmp")) {

Header ("Content-type:image/vnd.wap.wbmp");

Imagewbmp ($im);

}

Else

Die ("No Image Support on this Server!");

Imagedestroy ($im);

}

}