一个好用的验证码PHP工具类

2. /**
3. * 验证码类
4. */
5. class Base_Tool_Verify{
6. /**
7. * 生成验证码方法
8. */
9. public static function createCode(){
10. //生成验证码图片
11. // 全数字
12. $str = "D,B,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,W,J,K,M,M,N,K,P,Q,R,S,T,U,V,W,X,Y,Z"; //要显示的字符，可自己进行增删
13. $list = explode(",", $str);
14. $cmax = count($list) - 1;
15. $verifyCode = '';
16. for ( $i=0; $i $randnum = mt_rand(0, $cmax);
17. $verifyCode .= $list[$randnum]; //取出字符，组合成为我们要的验证码字符
18. }
19. $_SESSION['code'] = $verifyCode; //将字符放入SESSION中
21. $im = imagecreate(80,28); //生成图片
22. $black = imagecolorallocate($im, 0 ,0 ,0); //此条及以下三条为设置的颜色
23. $white = imagecolorallocate($im, 244,249,244);
24. $gray = imagecolorallocate($im, rand(200,255),rand(200,255),rand(200,255));
25. $red = imagecolorallocate($im, rand(200,255), rand(200,255), rand(200,255));
26. $rand_color = imagecolorallocate($im, rand(0,255), rand(0,255), rand(0,255));
27. $rand_color2 = imagecolorallocate($im, rand(0,255), rand(0,255), rand(0,255));
28. imagefill($im,0,0,$white); //给图片填充颜色
29. $pix=imagecolorallocate($im,rand(0,255),rand(0,255),rand(0,255));
30. mt_srand();
31. for($i=0;$i {
32. imagesetpixel($im,mt_rand(0,180),mt_rand(0,35),$pix);
33. }
34. imageline($im, 0,rand(0,28), 80, rand(0,28), $rand_color);
35. imageline($im, 0,rand(0,28), 80, rand(0,28), $rand_color2);
37. //将验证码绘入图片
38. $mycolor = imagecolorallocate($im, 0, 78, 152);
39. $path = API_PATH.DS.'Base'.DS.'Tool';
40. putenv('GDFONTPATH=' . $path);
41. $font = 'simhei.ttf';
42. $arrstr = str_split($verifyCode);
43. imagettftext($im, 20, rand(0,50), 10, rand(20,30), $mycolor, $font, $arrstr[0]);
44. imagettftext($im, 15, rand(0,50), 20, rand(20,30), $mycolor, $font, $arrstr[1]);
45. imagettftext($im, 15, rand(0,50), 30, rand(20,30), $mycolor, $font, $arrstr[2]);
46. imagettftext($im, 15, rand(0,50), 40, rand(20,30), $mycolor, $font, $arrstr[3]);
47. $font2=imagecolorallocate($im,41,163,238);
48. imagerectangle($im,0,0,1,1,$font2);
49. imagepng($im);
50. imagedestroy($im);
51. }
52. }

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好用, 验证码, PHP