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Sina App Engine (SAE) Introductory Tutorial (4)-Saevcode (CAPTCHA service) use

Source: Internet
Author: User
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Resources
    • Saevcode API Documentation
Using tutorials

All the verification code principle is to generate a vcode string, stored in the session, and the user's input to compare and judge, the following is a complete example of the use of code services:


Home index.html

<HTML><title>Sae Vcode Demo</title><Body>        <formAction= "check.php">                <inputtype= "text"name= "Vcode"><imgsrc= "vcode.php">                <inputtype= "Submit"value= "Submit">        </form></Body></HTML>

Script to generate the captcha vcode.php

<?PHPSession_Start();$vcode=NewSaevcode ();if($vcode===false)        Var_dump($vcode->errno (),$vcode-errmsg ()); $_session[' vcode '] =$vcode-answer ();$question=$vcode-question ();$imgdata=file_get_contents($question[' Img_url ']);Header("Content-type:image/jpg");Echo($imgdata);?>

User submits verification Code judgment script check.php

<? PHP $vcode $_request [' Vcode ']; Session_Start (); if ($_session$vcode) {        echo ' vcode error ';} Else {        echo "Vcode right";}
This example shows the address

http://lazydemo.sinaapp.com/saevcode/

Code Packaging

Http://lazydemo.sinaapp.com/saevcode/saevcode.zip

Sina App Engine (SAE) Introductory Tutorial (4)-Saevcode (CAPTCHA service) use

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