本文实例讲述了DEDECMS在PHP5.4不能正常运行的解决方法。分享给大家供大家参考。具体分析如下：

PHP5.4是公开发行的PHP程式最新版本,其执行速度和内存占用等相比PHP5.3而言有10%~30%的性能提升,所以笔者也一直想在实际环境中试运行PHP5.4(PHP5.4目前最新的版本为5.4.9)。

棘手的是与PHP5.2升级到PHP5.3有所不同的是,从5.3到5.4之间似乎变化不少,这也造成了笔者在将DEDECMS系统迁移到PHP5.4.x平台的时候出现了前台500错误后台直接空白的情况,当时也没有深究便换回PHP5.3了。

最近仔细查了下相关资料,发现主要是因为目前DEDECMS代码中使用了PHP5.4中弃用的一些函数,主要如下：

allow_call_time_pass_reference、define_syslog_variables、highlight.bg、register_globals、register_long_arrays、magic_quotes、safe_mode、zend.ze1_compatibility_mode、session.bug_compat42、session.bug_compat_warn、session_register以及 y2k_compliance

其中造成DEDECMS5.7无法正常运行的函数便是session_register。

网上实测有效的方法有如下两种：

第一种方法申明将此函数废弃,在include/userlogin.class.php中加入如下代码：

function session_register()

{

return true;

}

第二种方法是该该页中的函数代码替换,被替换代码大致在287到308行之间,代码如下:

@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, '/');

替换为如下代码:

global $admincachefile,$adminstyle;

if(emptyempty($adminstyle)) $adminstyle = 'dedecms';

$_SESSION[$this->keepUserIDTag] = $this->keepUserIDTag;

$_SESSION[$this->keepUserIDTag] = $this->userID;

$_SESSION[$this->keepUserTypeTag] = $this->keepUserTypeTag;

$_SESSION[$this->keepUserTypeTag] = $this->userType;

$_SESSION[$this->keepUserChannelTag] = $this->keepUserChannelTag;

$_SESSION[$this->keepUserChannelTag] = $this->userChannel;

$_SESSION[$this->keepUserNameTag] = $this->keepUserNameTag;

$_SESSION[$this->keepUserNameTag] = $this->userName;

$_SESSION[$this->keepUserPurviewTag] = $this->keepUserPurviewTag;

$_SESSION[$this->keepUserPurviewTag] = $this->userPurview;

$_SESSION[$this->keepAdminStyleTag] = $this->keepAdminStyleTag;

$_SESSION[$this->keepAdminStyleTag] = $adminstyle;

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

PutCookie('DedeLoginTime', time(), 3600 * 24, '/');

希望本文所述对大家的dedecms建站有所帮助。