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字符串或变量内存在有变量则解析错误
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2004-12-31 20:37newtiesPHP安装配置后，运行时，如果字符串或变量内存在有变量，则产生解析错误
如下面的代码：
if($tables[$key]) $tableExist .= "- 数据表 $key 已经存在";
$cfg['navigationPreA'] = "";
都会产生类似如下错误：
Notice: Undefined variable: rootDir in /include/config.php on line 39
Notice: Undefined variable: rootDir in /include/config.php on line 40
Notice: Undefined index: widthPage in /include/function.php on line 486
Notice: Undefined index: step in /admin/install.php on line 253
Notice: Undefined index: step in /admin/install.php on line 253
Notice: Undefined variable: Bg in /include/function.php on line 356
Notice: Undefined variable: tables in /admin/install.php on line 270
Notice: Undefined variable: tables in /admin/install.php on line 270
Notice: Undefined variable: tables in /admin/install.php on line 270
Notice: Undefined variable: tables in /admin/install.php on line 270
Notice: Undefined variable: tables in /admin/install.php on line 270
请问，谁知道这是怎么回事？
是php.ini 配置错误还是有什么问题？需要说明的是所运行的程序在其它服务器运行正常。
谢谢 - 数据表 $key 已经存在";
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