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PHP线上错误日志控制(error_reporting和display_errors)

Jun 08, 2016 pm 05:22 PM
display error errors nbsp

在php学习中error_reporting和display_errors是两个非常重要的参数,我们在学习调试过程中是少不了它们的,开启与关闭这两个错误日志非常的简单只要在php.ini简单处理即可,下文会有介绍。

<script>ec(2);</script>

我们知道产品的生产环境肯定是不给予显示错误的,于是:
php.ini中将 display_errors = Off 改为display_errors = On
或者 ini_set('display_errors',0);

其次,我们知道php的错误级别是由error_reporting【error_reporting详细教程】控制的,但是有很多人在生产环境关闭了错误信息提示
error_reporting(0);

其实这种做法,我觉得不科学,在codeigniter框架就是这样

 代码如下 复制代码

if (defined('ENVIRONMENT'))
{
 switch (ENVIRONMENT)
 {
  case 'development':
   error_reporting(E_ALL);
  break;
 
  case 'testing':
  case 'production':
   error_reporting(0);
  break;
 
  default:
   exit('The application environment is not set correctly.');
 }
}

线上的错误信息肯定是要记录的,error_reporting(0)这样会导致所有的错误信息不会记录,应该:error_reporting = E_ALL & ~E_NOTICE,只要display_errors = Off,错误信息就不会再页面上显示,因为display_errors的优先级别更高。

特别要注意的是:
如果php.ini中log_errors= On,据官方的说法,那么必须指定error_log文件,如果没指定或者指定的文件没有权限写入,那么照样会输出到正常的输出渠道,那么也就使得display_errors 这个指定的Off失效,错误信息还是打印了出来。将log_errors = Off就行了。

总结下,在生产环境中不现实错误信息还能记录错误日志:

 

 代码如下 复制代码
/**
 * 记录生产环境错误日志
 *
 * @link http://www.111cn.net
 */
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');
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