web服务-在使用android设备上的nusoap web服务时，不会创建PHP会话变量

Question

我有一个nu_soap Web服务，我想创建它并用它发送Captcha代码和图像。

我正在使用getcaptcha web服务将生成的Captcha代码和Captcha Id放入会话变量中。通过使用另一个名为validateCaptcha的web服务，我正在检查它是否有效，

问题是，当我用Firefox Soa客户端插件检查我的web服务时，web服务工作正常，所有会话变量都工作正常。

但当我试图使用android手机进行检查时，会话变量没有定义或为空。

获取captcha代码：

<?php
session_start();
include_once('./Utility/DBM.php');
include_once('captcha.class.php');
class getCaptcha extends DBM
{
    public function getcaptchacode($dump)
    {
        //creating and generating captcha image and code
        $img = createcaptcha();
        //Creating Captcha Id
        $CaptchaId = (mt_rand(1,1000) . "1234");
        imagepng($img[0],'Captcha/'.$CaptchaId.'.png');
        imagedestroy($img[0]);

        //encoding to base64 and getting file content
        $base64 = base64_encode(file_get_contents('./Captcha/'.$CaptchaId.'.png'));
        //setting up session for captcha
        $_SESSION['Captcha_Code']=$img[0];
        $_SESSION['Captcha_ID']=$CaptchaId;
        $img[]='';
        $captcha=$base64;
        $captchaId = $CaptchaId;
        $this->strResult = "";

            $this->strResult.="<captcha>";
            $this->strResult.="<captcha>$captcha</captcha>";
            $this->strResult.="<captcha_Id>$captchaId</captcha_Id>";
            $this->strResult.="</captcha>";
    }

    function __toString()
    {
        if($this->strResult!=""){
            return $this->strResult;
        }
        return "";
    }

}
?>

验证验证码：

<?php
session_start();
include_once('./Utility/DBM.php');
class validateCaptcha extends DBM
{
    public function validatecaptcha($CaptchaCode,$Captcha_Id)
    {
        if(($CaptchaCode!=""&&$CaptchaCode==$_SESSION['Captcha_Code'])&&($Captcha_Id!=""&&$Captcha_Id==$_SESSION['Captcha_ID']))
        {
             $msg="Captcha is correct";
            //generating a Token using md5 & salt
            $hash = md5(mt_rand(1,1000000) . "123456");
            $token=$_SESSION['CapToken'] = $hash;
            //starting token session time
            $_SESSION['Token_time'] = time();
            //destroying captcha image
            unlink('./Captcha/'.$Captcha_Id.'.png');
        }
        else
        {
            //destroying captcha image
            unlink('./Captcha/'.$Captcha_Id.'.png');
            //destroying all session
            //session_destroy();
            $msg="Wrong Captcha Entered";
            $token="";
        }
        $this->strResult = "";

            $this->strResult.="<captcha>";
            $this->strResult.="<captcha>$msg</captcha>";
            $this->strResult.="<token>$token</token>";
            $this->strResult.="</captcha>";

    }

    function __toString()
    {
        if($this->strResult!=""){
            return $this->strResult;
        }
        return "";
    }

}
?>

Answer 1

我找到了这个问题的解决方案，我想把它发布在这里供其他人使用。

我没有使用会话变量，而是使用mysql数据库来存储captcha（id，code，token，expire_time），然后我使用php date（）函数来检查captcha时间是否未过期并且有效。

验证代码：

class validateCaptcha extends DBM
{
    public function validatecaptcha($CaptchaCode,$Captcha_Id)
    {
        $select_captcha = $this->select("captchaid,code,token,expire", "captcha", "code='$CaptchaCode' AND captchaid='$Captcha_Id'", 0, 0);
        $captcha_check=mysql_num_rows($select_captcha);
        $row = mysql_fetch_assoc($select_captcha);
        if($captcha_check)
        {
             $msg="Captcha is correct";
             $token=$row['token'];
            //destroying captcha image
            unlink('./Captcha/'.$Captcha_Id.'.png');
        }
        else
        {
            //destroying captcha image
            unlink('./Captcha/'.$Captcha_Id.'.png');
            $msg="Wrong Captcha Entered";
            $token="";
        }
        $this->strResult = "";

            $this->strResult.="<captcha>";
            $this->strResult.="<captcha>$msg</captcha>";
            $this->strResult.="<token>$token</token>";
            $this->strResult.="</captcha>";

    }

获取captcha代码：

class getCaptcha extends DBM
{
    public function getcaptchacode($dump)
    {
        //creating and generating captcha image and code
        $img = createcaptcha();
        //Creating Captcha Id
        $CaptchaId = (mt_rand(1,1000) . "1234");
        imagepng($img[0],'Captcha/'.$CaptchaId.'.png');
        imagedestroy($img[0]);

        //encoding to base64 and getting file content
        $base64 = base64_encode(file_get_contents('./Captcha/'.$CaptchaId.'.png'));
        //generating a Token using md5 & salt
        $hash = md5(mt_rand(1,1000000) . "123456");
        $token=$_SESSION['CapToken'] = $hash;
        //Getting time
        $getime=date('Y-m-d H:i:s');
        //inserting into captcha table
        $this->RunQuery("INSERT INTO captcha (captchaid,code,token,expire) VALUES ('$CaptchaId','$img[1]','$token','$getime')", true, false);//TODO query
        if (mysql_insert_id())
            $Response = 'True';
        else
            $Response = 'False';
        //deleting inactive captcha for 15 minutes
        $this->RunQuery("DELETE FROM captcha WHERE expire < DATE_SUB(NOW(), INTERVAL 15 MINUTE)",true,false);
        $img[]='';
        $captcha=$base64;
        $captchaId = $CaptchaId;
        $this->strResult = "";

            $this->strResult.="<captcha>";
            $this->strResult.="<captcha>$captcha</captcha>";
            $this->strResult.="<captcha_Id>$captchaId</captcha_Id>";
            $this->strResult.="<Response>$Response</Response>";
            $this->strResult.="</captcha>";

    }