Copy CodeThe code is as follows:
function Vcode ($num =4, $size =20, $width =0, $height =0) {
! $width && $width = $num * $size *4/5+5;
! $height && $height = $size + 10;
Removed 0 1 O l etc.
$str = "23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVW";
$code = ";
for ($i =0; $i < $num; $i + +) {
$code. = $str [Mt_rand (0, strlen ($str)-1)];
}
Drawing images
$im = Imagecreatetruecolor ($width, $height);
Define the colors you want to use
$back _color = Imagecolorallocate ($im, 235, 236, 237);
$boer _color = Imagecolorallocate ($im, 118, 151, 199);
$text _color = imagecolorallocate ($im, Mt_rand (0,200), Mt_rand (0,120), Mt_rand (0,120));
Painting background
Imagefilledrectangle ($im, 0,0, $width, $height, $back _color);
Draw Border
Imagerectangle ($im, 0,0, $width-1, $height-1, $boer _color);
Draw interference Lines
for ($i =0; $i <5; $i + +) {
$font _color = imagecolorallocate ($im, Mt_rand (0,255), Mt_rand (0,255), Mt_rand (0,255));
Imagearc ($im, Mt_rand (-$width, $width), Mt_rand (-$height, $height), Mt_rand ($width), Mt_rand ($height), Mt_ Rand (0,360), Mt_rand (0,360), $font _color);
}
Draw interference points
for ($i =0; $i <50; $i + +) {
$font _color = imagecolorallocate ($im, Mt_rand (0,255), Mt_rand (0,255), Mt_rand (0,255));
Imagesetpixel ($im, Mt_rand (0, $width), Mt_rand (0, $height), $font _color);
}
Draw Verification Code
@imagefttext ($im, $size, 0, 5, $size +3, $text _color, ' C://WINDOWS//FONTS//SIMSUN.TTC ', $code);
Header ("cache-control:max-age=1, s-maxage=1, No-cache, must-revalidate");
Header ("Content-type:image/png");
Imagepng ($im);
Imagedestroy ($im);
}
?>
function Description and examples:
4 characters with a size of 20
Vcode (4,20);
?>
http://www.bkjia.com/PHPjc/327500.html www.bkjia.com true http://www.bkjia.com/PHPjc/327500.html techarticle Copy the code as follows: Php function Vcode ($num =4, $size =20, $width =0, $height =0) {! $width $width = $num * $size *4/5+5;! $height $hei ght = $size + 10; Removed 0 1 O L and other $str ...
