Modified A Very Good php Verification Code (supports Chinese)

Php Verification Code
Captcha. class. php

Copy codeThe Code is as follows: <? Php
Class Captcha
{
Private $ width;
Private $ height;
Private $ codeNum;
Private $ code;
Private $ im;
Function _ construct ($ width = 80, $ height = 20, $ codeNum = 4)
{
$ This-> width = $ width;
$ This-> height = $ height;
$ This-> codeNum = $ codeNum;
}
Function showImg ()
{
// Create an image
$ This-> createImg ();
// Sets the interference element.
$ This-> setDisturb ();
// Set the verification code
$ This-> setCaptcha ();
// Output image
$ This-> outputImg ();
}
Function getCaptcha ()
{
Return $ this-> code;
}
Private function createImg ()
{
$ This-> im = imagecreatetruecolor ($ this-> width, $ this-> height );
$ BgColor = imagecolorallocate ($ this-> im, 0, 0, 0 );
Imagefill ($ this-> im, 0, 0, $ bgColor );
}
Private function setDisturb ()
{
$ Area = ($ this-> width * $ this-> height)/20;
$ DisturbNum = ($ area> 250 )? 250: $ area;
// Add point interference
For ($ I = 0; $ I <$ disturbNum; $ I ++ ){
$ Color = imagecolorallocate ($ this-> im, rand (0,255), rand (0,255), rand (0,255 ));
Imagesetpixel ($ this-> im, rand (1, $ this-> width-2), rand (1, $ this-> height-2), $ color );
}
// Add an arc
For ($ I = 0; $ I <= 5; $ I ++ ){
$ Color = imagecolorallocate ($ this-> im, rand (128,255), rand (125,255), rand (100,255 ));
Imagearc ($ this-> im, rand (0, $ this-> width), rand (0, $ this-> height), rand (30,300), rand (20,200 ), 50, 30, $ color );
}
}
Private function createCode ()
{
$ Str = "23456789 abcdefghijkmnpqrstuvwxyzABCDEFGHIJKMNPQRSTUVWXYZ ";
For ($ I = 0; $ I <$ this-> codeNum; $ I ++ ){
$ This-> code. = $ str {rand (0, strlen ($ str)-1 )};
}
}
Private function setCaptcha ()
{
$ This-> createCode ();
For ($ I = 0; $ I <$ this-> codeNum; $ I ++ ){
$ Color = imagecolorallocate ($ this-> im, rand (50,250), rand (100,250), rand (128,250 ));
$ Size = rand (floor ($ this-> height/5), floor ($ this-> height/3 ));
$ X = floor ($ this-> width/$ this-> codeNum) * $ I + 5;
$ Y = rand (0, $ this-> height-20 );
Imagechar ($ this-> im, $ size, $ x, $ y, $ this-> code {$ I}, $ color );
}
}
Private function outputImg ()
{
If (imagetypes () & IMG_JPG ){
Header ('content-type: image/jpeg ');
Imagejpeg ($ this-> im );
} Elseif (imagetypes () & IMG_GIF ){
Header ('content-type: image/gif ');
Imagegif ($ this-> im );
} Elseif (imagetype () & IMG_PNG ){
Header ('content-type: image/png ');
Imagepng ($ this-> im );
} Else {
Die ("Don't support image type! ");
}
}
}

Demo. phpCopy codeThe Code is as follows: <? Php
Require_once 'captcha. class. php ';
$ Captcha = new Captcha (80, 30, 4 );
$ Captcha-> showImg ();

The above supports English, and a Chinese-supported verification code is attached to the students home.Copy codeThe Code is as follows: <? Php
/*
For more information, see ITBBS.
Modify contact author mailbox: Smartly@itbbs.cn
*/
Header ("Content-type: image/PNG ");
$ Str = "first, when there is a conflict with everyone, the main person will use work hours for them to make Chinese products. When I arrive, he will make achievements. For the lower-level students, he will build a ministry of people. the outsourcers can go to the same industry to say that they are too desperate, and after many sub-accounts, they can go from social networks and small hosts, and also rely on their own power lines. The high volume of electricity, the long party has to go through the real-time and deep-seated methods. zheng sanhao's ten-day war had no prefix for farming and other anti-body fight routes. The newly opened things were changed from when two or more tianzi event teams were approved and thought-provoking. guan Dian Yu Zhong his thoughts and in-room because of the day-benefit phase by the pressure officer gas industry on behalf of the whole group number fruit period guide each base or month Mao ran asked than exhibition that it did not see governance I propose five solutions to the forest's rice clusters. I only want four horses to recognize the article, but the article is more grams and the leading public holes are connected to the seat transport and flying crude oil. I am very determined that Shi Qiang is very rare and has gone through a total of direct mission to create another cut nine you take the west holding the total material re-election of the mind to adjust the seven What mountain Cheng baibao more see must be really hot Protection Committee the hand-modified management department has already completed the repair and identification of the disease, and the old-light and special-style 6-type secondary security belt shows the completion of each East-increased traffic back to the south-guang Lao Lun kebei to build a car for the festival to be completed. lianbu class set no. column temperature installation that is without notice axis research solid color fast anti-shi Lashi set dalon field weaving calendar flowers by seeking to pass the mouth broken condition mining fine gold industry products determination parameter layer end side clear to ten OK the book-writing factory must be away from the eyes of the sea, and the children of the qingcai 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$ ImgWidth = 140;
$ ImgHeight = 40;
$ Authimg = imagecreate ($ imgWidth, $ imgHeight );
$ BgColor = ImageColorAllocate ($ authentication, 255,255,255 );
$ Fontfile = "heiti. ttf ";
$ White = imagecolorallocate ($ authimg, 234,185, 95 );
Imagearc ($ authimg, 150, 8, 20, 20, 75,170, $ white );
Imagearc ($ authimg, 180, 75,175, 30, $ white );
Imageline ($ authimg, 20, 20, 180,30, $ white );
Imageline ($ authimg, 20, 18, 170,50, $ white );
Imageline ($ authimg, 25, 50, 80, 50, $ white );
$ Noise_num = 800;
$ Line_num = 20;
Imagecolorallocate ($ authimg, 0xff, 0xff, 0xff );
$ Rectangle_color = imagecolorallocate ($ authimg, 0xAA, 0xAA, 0xAA );
$ Noise_color = imagecolorallocate ($ authimg, 0x00,0x00,0x00 );
$ Font_color = imagecolorallocate ($ authimg, 0x00,0x00,0x00 );
$ Line_color = imagecolorallocate ($ authimg, 0x00,0x00,0x00 );
For ($ I = 0; $ I <$ noise_num; $ I ++ ){
Imagesetpixel ($ authimg, mt_rand (0, $ imgWidth), mt_rand (0, $ imgHeight), $ noise_color );
}
For ($ I = 0; $ I <$ line_num; $ I ++ ){
Imageline ($ authimg, mt_rand (0, $ imgWidth), mt_rand (0, $ imgHeight), mt_rand (0, $ imgWidth), mt_rand (0, $ imgHeight ), $ line_color );
}
$ Randnum = rand (0, strlen ($ str)-4 );
If ($ randnum % 2) $ randnum + = 1;
$ Str = substr ($ str, $ randnum, 8 );
$ Str = iconv ("GB2312", "UTF-8", $ str );
ImageTTFText ($ authimg, 20, 0, 16, 30, $ font_color, $ fontfile, $ str );
ImagePNG ($ authimg );
ImageDestroy ($ authimg );
?>