display_errors & error_reporting（php调试安全）

这两个选项对应的值即都可以在php.ini文件中设置，也都可以在php代码中使用相应的函数来设置。

在php.ini文件中的设置如下：

Display_errors = On : 打开错误回显。

Display_errors = Off：关闭错误回显。

Error_reporting = ，如下：

值	常量	描述
1	E_ERROR	Fatal run-time errors. Errors that can not be recovered from. Execution of the script is halted
2	E_WARNING	Non-fatal run-time errors. Execution of the script is not halted
4	E_PARSE	Compile-time parse errors. Parse errors should only be generated by the parser
8	E_NOTICE	Run-time notices. The script found something that might be an error, but could also happen when running a script normally
16	E_CORE_ERROR	Fatal errors at PHP startup. This is like an E_ERROR in the PHP core
32	E_CORE_WARNING	Non-fatal errors at PHP startup. This is like an E_WARNING in the PHP core
64	E_COMPILE_ERROR	Fatal compile-time errors. This is like an E_ERROR generated by the Zend Scripting Engine
128	E_COMPILE_WARNING	Non-fatal compile-time errors. This is like an E_WARNING generated by the Zend Scripting Engine
256	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 code
4096	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)

如有多个选项值，请使用 | 隔开。

在php代码中的设置如下：

Display_errors选项的设置使用ini_set函数。

Error_reporting选项的设置使用error_reporting函数。

代码如下：

例程1：

<?php

//获取并输出php.ini里display_errors变量的值

echo ini_get('display_errors');

echo '------------1-1-1------------';

echo '<br />';

//如果display_errors = 0（即Off），则重置display_errors = 1（即On）

if (!ini_get('display_errors'))

{

　　ini_set('display_errors', '1');

}

echo ini_get('display_errors');

echo '<br />';

//获取并输出php.ini里所有变量的值

$ini = ini_get_all();

print_r($ini);

例程2：

<?php

//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);

例程3：

<?php

//记录生产环境错误日志

error_reporting(E_ALL);

ini_set('display_errors',0);

ini_set('log_errors',1);

ini_set('error_log','E:\'.date('Y-m-d').'_phpddt.com.txt');

好了，php语言的安全特性到此就讲完了。

巴特西

display_errors & error_reporting（php调试安全）

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