new captcha sites

Problem:Today, there is a strange problem, each page requested the Asp.net_sessionid of the cookie is not the same , resulting in a verification code validation error . That is, each request is a new session, we guarantee the verification code in

Deploy a Web Twitter client to Google App Engine OAuth provides a better way for consumers to access protected resources at the service provider's site. By using OAuth, user credentials will never be exposed to sites other than where the user data

A joke about verification code What is a verification code "Verification Code" (CAPTCHA) in fact, not everyone is always seen on different websites of the illegible letter combination pronoun, but "fully automatic distinction between computer and

This article mainly introduces the ThinkPHP3.2.3 verification code display, refresh, calibration, with a certain reference value, interested in small partners can refer to. ThinkPHP3.2.3 Verification code display, refresh, check, as follows: Show

Show Verification CodeFirst create a public controller under Home/controller Publiccontroller1 entry (); 20 }21 /* Verification Code Check */23 public function check_verify ($code, $id = ") { $verify = new \think\v Erify ();

Show Verification CodeFirst create a public controller under Home/controller Publiccontroller1 entry (); }21 /* Verification Code Check */23 public function check_verify ($code, $id = ") { $verify = new \think\verify ( );

This time in writing PHP script, access to the Web front-end and web security issues more, then give us a brief talk about our site verification code verification process and security issues. From three aspects to talk about the use of verification

In order to prevent malicious users, or use the software to submit some content, you have to use a verification code to block, although this will affect the user experience, but in order to avoid some problems many sites have used a verification

Synchronous vs. asynchronous Synchronous and asynchronous attention is to the message communication mechanism (synchronous communication/asynchronous communication)The so-called synchronization is that when a call is made, the call does not

　　Many sites in the user to make a click, such as online shopping confirmation purchase, the user will be asked to enter a verification code, which in general is not a problem, but in the user needs to buy frequently or snapped when it is very