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这些是 PHP 的提示而非报错，PHP 本身不需要事先声明变量即可直接使用，但是对未声明变量会有提示。一般作为正式的网站会把提示关掉的，甚至连错误信息也被关掉; 关闭 PHP 提示的方法 搜索php.ini： error_reporting = E_ALL 改为： error_reporting = E_ALL & ~E_NOTICE 还有个不是办法的办法就是 在每个文件头上加 error_reporting(0);
<?php error_reporting(0); ?>
