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php简单验证码的制作

时间:2021-07-01 10:21:17 帮助过:2人阅读

  1. $image=imagecreatetruecolor(100, 30);
  2. $white=imagecolorallocate($image, 255, 255, 2);
  3. $red=imagecolorallocate($image, 255, 0, 0);
  4. imagefill($image, 0, 0, $white);
  5. //munber create
  6. $num="";
  7. for($i=0;$i<5;$i++){
  8. $num.=rand(1,9);
  9. }
  10. imagestring($image, 6, rand(10,20), rand(00,10), $num,imagecolorallocate($image, rand(0,100), rand(100,125), rand(0,255)) );
  11. for($j=0;$j<200;$j++){
  12. imagesetpixel($image,rand(1,199), rand(1,29), imagecolorallocate($image, 255, 0, 0));
  13. }
  14. for($k=0;$k<5;$k++){
  15. imageline($image, rand(1,99), rand(1,29), rand(1,99), rand(1,29), imagecolorallocate($image,0,255, 0));
  16. }
  17. header("Content-type:image/png");
  18. imagepng($image);
  19. imagedestroy($image);
  20. ?>

验证码, php

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