PHP页面出现空白页面该怎么办

　　帮客之家(www.Bkjia.com)教程 在使用 PHP 程序的过程中，我们经常会碰到页面出现空白，页面出现空白是因为程序运行过程中遇到问题不能正常执行，而 PHP 环境配置信息又阻止向页面输出 PHP 返回的错误信息，遇到这样的问题不要惊慌，只要打开PHP的报错信息，然后根据错误信息提示就能找到问题的原因，然后逐步解决。

　　下面介绍如何在程序中设置PHP的报错级别：

　　我们在程序运行的开始利用 error_reporting()函数设置 PHP 的报错级别并返回当前级别。

以下为引用的内容：
error_reporting(report_level);

以下为引用的内容：
如果参数 level 未指定，当前报错级别将被返回。下面几项是 level 可能的值：值     常量               描述1     E_ERROR     Fatal run-time errors. Errors that can not be recovered from. Execution of the script is halted2     E_WARNING     Non-fatal run-time errors. Execution of the script is not halted4     E_PARSE     Compile-time parse errors. Parse errors should only be generated by the parser8     E_NOTICE     Run-time notices. The script found something that might be an error, but could also happen when running a script normally16     E_CORE_ERROR     Fatal errors at PHP startup. This is like an E_ERROR in the PHP core32     E_CORE_WARNING     Non-fatal errors at PHP startup. This is like an E_WARNING in the PHP core64     E_COMPILE_ERROR     Fatal compile-time errors. This is like an E_ERROR generated by the Zend Scripting Engine128     E_COMPILE_WARNING     Non-fatal compile-time errors. This is like an E_WARNING generated by the Zend Scripting Engine256     E_USER_ERROR     Fatal user-generated error. This is like an E_ERROR set by the programmer using the PHP function trigger_error()512     E_USER_WARNING     Non-fatal user-generated warning. This is like an E_WARNING set by the programmer using the PHP function trigger_error()1024     E_USER_NOTICE     User-generated notice. This is like an E_NOTICE set by the programmer using the PHP function trigger_error()2048     E_STRICT     Run-time notices. PHP suggest changes to your code to help interoperability and compatibility of the code4096     E_RECOVERABLE_ERROR     Catchable fatal error. This is like an E_ERROR but can be caught by a user defined handle (see also set_error_handler())8191     E_ALL     All errors and warnings, except level E_STRICT (E_STRICT will be part of E_ALL as of PHP 6.0)

　　例子：

以下为引用的内容：
任意数目的以上选项都可以用“或”来连接（用 OR 或 |），这样可以报告所有需要的各级别错误。例如，下面的代码关闭了用户自定义的错误和警告，执行了某些操作，然后恢复到原始的报错级别：//禁用错误报告error_reporting(0);//报告运行时错误error_reporting(E_ERROR | E_WARNING | E_PARSE);//报告所有错误error_reporting(E_ALL);?>