Use PHP to manually create a moving multi-frame GIF image verification code_PHP tutorial

Effect demonstration: http://pcik.7di.net/pcik_reg

Baidu's effect demonstration: https://passport.baidu.com/cgi-bin/genimage?captchaservice63636236364e55367233302f31673844526b664451665a5a4d4977466974376b707a754466777934697449 455561625171346c725055444b51734a35376d2b4f744b6d303238315341382b354675344c3153745869487252376169752b437450515138574972436 752584f53717849726f48593258666c373574593753614f4d32703831724e 51722b694a31756b67467137644c30506979496639594e504931536732687a 5a505379305544554245724f76694a307247632b4f76426165663144732b595359394950413470476453787865564f6b506e674f7537637264526d7165 41377a384b487445624f365a4774657a58502b7347703763696d575261417 1615747784e5a6c5042336634766a5049766853365974444258577968645a4 f654f55

Since I’m not good at it, I can’t achieve the gorgeous effect of Baidu. Please forgive me

The verification code image is composed of multiple frames generated by PHP, so the verification code is a real and movable gif
How to use is very simple:
Description:
Gif verification code creation class
Author:
7di.net QQ group:223494678
Call:

Verification:
IF(!isSet($_SESSION['code']) Or StrToLower($_SESSION['code'])!=StrToLower($cod)){
throw New Exception('Error:'.__LINE__.',Verification code error!');Die();
}unSet($cod,$_SESSION['code']);

Download address: http://download.csdn.net/detail/sibang/5852531