How To Add Captcha

In PHP to generate a CAPTCHA image is quite simple, because in PHP for us to provide a graphics Gd.dll library, to enable the GD graphics library we just php.ini in the PHP-GD front; Method a $authnum = '; $ychar = "0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z&qu ...

Php tutorial pattern verification code generation code and include ajax verification example application previously written verification code program is to provide the source code, but did not really figure verification code generated to verify the instance, this time we have a complete example of PHP validation It's There are 3 files: authcode.php ----- verification code generation php file authcode.html ----- front display page dealauthcode.php ----- ajax submitted to the background processing to determine the verification code is correct Processing page ...

Php tutorial pattern verification code generation code and include ajax verification example application previously written verification code program is to provide the source code, but did not really figure verification code generated to verify the instance, this time we have a complete example of PHP validation It's There are 3 files: authcode.php ----- verification code generation php file authcode.html ----- front display page dealauthcode.php ----- ajax submitted to the background processing to determine the verification code is correct Processing page ...

In the era of cyber-security, the verification code function can at least be regarded as a trustworthy good guard. In this article, we'll talk about how to use the CAPTCHA function in thinkphp. The Extension class Library Thinkphp's extensions are performed with the image processing class image and the character processing class string used to generate the random CAPTCHA code to complete the verification code function, which can be done in http://www.thinkphp.cn/extend/225. HTML download image processing class and http://www.thinkph ...

Since the user in the input verification code is always spent 5-10 seconds or so to identify the contents of the verification code, why not in the small window of the verification code put some ads? Canadian Nucaptcha Company in June launched the latest "Verification Code http://www.aliyun.com/zixun/aggregation/9391.html" > Display advertising products, causing great concern in the advertising industry. They embed the captcha in a 5-10-second flash video, and the user simply floats three red random characters in the video ...

Yesterday, a source said, 12306 of the new version of the verification code has been cracked, the use of professional software to identify and return to fill, the entire process is only 3 seconds. 　　At the same time, in order to cope with the upgrade of the website, the yellow cattle also updated the means of ticket, using 12306 booking military remnants of the ticket without verification, 45 minutes to pay the waiting time circular brush tickets and other ways to brush tickets. 　　Before, in order to deal with the ticket software, 12306 upgrade verification code, the static verification code into a constantly rocking color dynamic verification code, resulting in a lot of brush ticket software failure. 1 cents to crack the new verification code "has long been cracked ...

Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology Hall use WordPress to do the site's friends the most headaches one thing is spam comments, if not to do a Some measures, almost every day with a lot of web sites, Chinese and English composition, such as the mix of spam comments produced, these spam comments seriously affect the quality of the site and the user experience, how to prevent word ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host technology Hall login box exists for a long time, for the user is bound to contact every day, for the designer is also a rut control, two box plus a button, if suddenly grabbed a designer to ask " What do you think is the point of the login box that can be improved, the answer should be a long time silence, of course, including me. "Rather a think into, MO in a think stop", this is a generation of the master of the boxing, also is the truth of doing things, think into the side can have, a thought of the difference between the two, reflected in the Internet applications and services ...

"Editor's note" This article translates from the Smashing Magazine, the translator is @c7210, publishes in its personal blog beforweb. In this paper, the emotional design, the goal is to establish a relationship with the user at the level of personality, so that users in the process of interaction with the product to produce positive positive emotions. The case shows how users can better use the product and show how to make a more enjoyable experience for the user to actively share and promote these positive experiences to others. Flickr has a lot of interesting sign-in welcome words for users, which is actually ...

Before creating a web2.0 account with SENuke, we need to do some preparatory work: 1. Solve the problem of playing the verification Code (1) using http://www.aliyun.com/zixun/aggregation/2593.html "> third party service to automatically code I use decapture his home coding service, because cheap, correct rate is also good, Register to recharge after the SENuke to enter the line to start senuke–> wind ...