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PHP generates alphanumeric verification code images

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Release： 2016-07-25 08:44:37
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php generates alphanumeric verification code images

  3. header ('Content-Type: image/png');
  4. $image=imagecreatetruecolor(100, 30);
  5. $color=imagecolorallocate($image, 255, 255, 255) ;
  6. imagefill($image, 20, 20, $color);
  7. //Contains only numbers
  8. // for($i=0;$i<4;$i++){
  9. // $font=6;
  10. / / $x=rand(5,10)+$i*100/4;
  11. // $y=rand(8, 15);
  12. // $string=rand(0, 9);
  13. // $color= imagecolorallocate($image, rand(0,120), rand(0,120), rand(0,120));
  14. // imagestring($image, $font, $x, $y, $string, $color);
  15. // }
  17. //Containing numbers and letters
  18. for($i=0;$i<4;$i++){
  19. $fontSize=6;
  20. $x=rand(5,10)+$i*100/4;
  21. $y=rand(5, 15);
  22. $data='abcdefghijklmnopqrstuvwxyz123456789';
  23. $string=substr($data,rand(0, strlen($data)),1);
  24. $color=imagecolorallocate($image, rand(0,120), rand(0,120), rand(0,120));
  25. imagestring($image, $fontSize, $x, $y, $string, $color);
  26. }
  27. //interference point element
  28. for($ i=0;$i<200;$i++){
  29. $pointColor=imagecolorallocate($image, rand(100, 255), rand(100, 255), rand(100, 255));
  30. imagesetpixel($image, rand(0, 100), rand(0, 30), $pointColor);
  31. }
  32. //Interference line elements
  33. for($i=0;$i<2;$i++){
  34. $linePoint=imagecolorallocate($ image, rand(150, 255), rand(150, 255), rand(150, 255));
  35. imageline($image, rand(10, 50), rand(10, 20), rand(80,90) , rand(15, 25), $linePoint);
  36. }
  37. imagepng($image);
  38. imagedestroy($image);
  39. ?>
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Verification code, php


Related labels：
php生成数字字母的验证码图片
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