Php image Chinese verification code

Php image Chinese verification code

<? Php
Session_start ();

$ Vi = new vCodeImage;
$ Vi-> SetImage );

Class vCodeImage {
Var $ mode; // 1: digit mode; 2: Letter mode; 3: DIGIT/letter mode; others: DIGIT/letter optimized mode
Var $ v_num; // Number of verification codes
Var $ img_w; // the image width of the verification code.
Var $ img_h; // verification code Image height
Var $ int_pixel_num; // Number of interference pixels
Var $ int_line_num; // Number of interfering lines
Var $ font_dir; // relative path of the font file
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 = '2014, 255,200 '){
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 = ";
  }
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 = ", 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 );
$ 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 ++) {// interfere with 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); //
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 portrait
  }

Imageantialias ($ im, true); // Anti-aliasing

$ Time = time ();
$ _ SESSION ['vcode'] = $ v_code. "|". $ time; // returns the negative value of the verification code and generation time to $ _ SESSION [vCode].

// Generate an image for the browser
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 );
 }
}
?>