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php generates alphanumeric verification code images
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- header ('Content-Type: image/png');
- $image=imagecreatetruecolor(100, 30);
- $color=imagecolorallocate($image, 255, 255, 255) ;
- imagefill($image, 20, 20, $color);
- //Contains only numbers
- // for($i=0;$i<4;$i++){
- // $font=6;
- / / $x=rand(5,10)+$i*100/4;
- // $y=rand(8, 15);
- // $string=rand(0, 9);
- // $color= imagecolorallocate($image, rand(0,120), rand(0,120), rand(0,120));
- // imagestring($image, $font, $x, $y, $string, $color);
- // }
-
- //Containing numbers and letters
- for($i=0;$i<4;$i++){
- $fontSize=6;
- $x=rand(5,10)+$i*100/4;
- $y=rand(5, 15);
- $data='abcdefghijklmnopqrstuvwxyz123456789';
- $string=substr($data,rand(0, strlen($data)),1);
- $color=imagecolorallocate($image, rand(0,120), rand(0,120), rand(0,120));
- imagestring($image, $fontSize, $x, $y, $string, $color);
- }
- //interference point element
- for($ i=0;$i<200;$i++){
- $pointColor=imagecolorallocate($image, rand(100, 255), rand(100, 255), rand(100, 255));
- imagesetpixel($image, rand(0, 100), rand(0, 30), $pointColor);
- }
- //Interference line elements
- for($i=0;$i<2;$i++){
- $linePoint=imagecolorallocate($ image, rand(150, 255), rand(150, 255), rand(150, 255));
- imageline($image, rand(10, 50), rand(10, 20), rand(80,90) , rand(15, 25), $linePoint);
- }
- imagepng($image);
- imagedestroy($image);
- ?>
-
The above is the entire content of this article, I hope you all like it.
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