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想試試織夢的產(chǎn)品，下載了DedeCMS V5.7版本，在本地部署后，正確登錄后臺(tái)的情況下頁面沒有任何輸出和顯示（錯(cuò)誤登錄或密碼錯(cuò)誤時(shí)才有顯示），也沒有報(bào)錯(cuò)。進(jìn)到腳本調(diào)試，發(fā)現(xiàn)問題出在登錄頁login.php中以下部分。

...
$cuserLogin = new userLogin($admindir);
        if(!empty($userid) && !empty($pwd))
        {
            $res = $cuserLogin->checkUser($userid,$pwd);
            //success
            if($res==1)
            {
                $cuserLogin->keepUser();//此處以下無輸出
                if(!empty($gotopage))
                {
                    ShowMsg('成功登錄，正在轉(zhuǎn)向管理管理主頁！',$gotopage);
                    exit();
                }
                else
                {
                    ShowMsg('成功登錄，正在轉(zhuǎn)向管理管理主頁！',"index.php");
                    exit();
                }
                                echo "ok";
            }
...

到封裝userLogin類所在的腳本userlogin.class.php中查看（路徑./include/），所用的keepUser()方法

userlogin.class.php

...
function keepUser()
{
        if($this->userID != '' && $this->userType != '')
        {
                global $admincachefile,$adminstyle;
                if(empty($adminstyle)) $adminstyle = 'dedecms';

                @session_register($this->keepUserIDTag);
                $_SESSION[$this->keepUserIDTag] = $this->userID;

                @session_register($this->keepUserTypeTag);
                $_SESSION[$this->keepUserTypeTag] = $this->userType;

                @session_register($this->keepUserChannelTag);
                $_SESSION[$this->keepUserChannelTag] = $this->userChannel;

                @session_register($this->keepUserNameTag);
                $_SESSION[$this->keepUserNameTag] = $this->userName;

                @session_register($this->keepUserPurviewTag);
                $_SESSION[$this->keepUserPurviewTag] = $this->userPurview;

                @session_register($this->keepAdminStyleTag);
                $_SESSION[$this->keepAdminStyleTag] = $adminstyle;

                PutCookie('DedeUserID', $this->userID, 3600 * 24, '/');
                PutCookie('DedeLoginTime', time(), 3600 * 24, '/');

                $this->ReWriteAdminChannel();

                return 1;
        }
        else
        {
                return -1;
        }
}

把@去掉,session_register()報(bào)出錯(cuò)誤：
Call to undefined function session_register()
證實(shí)了問題來源于此。查手冊的描述如下：
"版本：(PHP 4, PHP 5 < 5.4.0)"
"本函數(shù)已自 PHP 5.3.0 起廢棄并將自 PHP 5.4.0 起移除。"

查看手冊

session_register()在PHP5.4后來的版本中已經(jīng)多余,可以省去而直接用$_SESSION['abc'] ="" ;

查看Stack Overflow關(guān)于此方法的問題。

解決方法：去掉或注釋掉所有的session_register()，改用直接存$_SESSION數(shù)組。

keepUser()部分

...
//session_register($this->keepUserIDTag);
$_SESSION[$this->keepUserIDTag] = $this->userID;

//session_register($this->keepUserTypeTag);
$_SESSION[$this->keepUserTypeTag] = $this->userType;

//session_register($this->keepUserChannelTag);
$_SESSION[$this->keepUserChannelTag] = $this->userChannel;

//session_register($this->keepUserNameTag);
$_SESSION[$this->keepUserNameTag] = $this->userName;

//session_register($this->keepUserPurviewTag);
$_SESSION[$this->keepUserPurviewTag] = $this->userPurview;

//session_register($this->keepAdminStyleTag);
$_SESSION[$this->keepAdminStyleTag] = $adminstyle;
...

修改后就正常顯示了。

我是從織夢主頁上下載的"最新"版本，很奇怪難道沒有人遇到同樣的問題嗎。這種問題既然這里能出現(xiàn)，別的部分就無法保證不會(huì)有更多這樣的隱患存在了。