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详解PHP错误日志的获取方法_PHP

May 30, 2016 am 08:46 AM

在PHP中错误日志的获取方法有很多种,下面我给大家简单介绍下遇到此类问题如何解决,下面通过代码给大家展示下,希望能够帮助到大家。

<&#63;php
error_reporting (0);
register_shutdown_function($err = 'my_error_handler') OR set_error_handler($err,E_ALL); // 同时注册两个函数.
// 函数参数错误
$original = unserialize ( array(423142,2134234));
// 不可对0除
echo 1/0;
// 不存在的数组索引
echo $_GET['aa'];
// 不存在的常量
PHP_E;
// 不存在的变量
echo $var;
// 函数参数错误
strlen(array(2434));
// 函数参数错误
md5(array(1));
// 用户自定义错误
trigger_error('safdds',E_USER_NOTICE);
// 不存在的函数 php中断
// tes();
// 不存在的方法 php中断
$ts = new afsd();
function my_error_handler($errno=0 ,$errstr=0 , $errfile=0 ,$errline=0){
 if($errno && $errfile){
  if(true){
   $earr = array();
   $earr['type'] = $errno;
   $earr['message'] = $errstr;
   $earr['file'] = $errfile;
   $earr['line'] = $errline;
  }
 }else{
  $earr = error_get_last();
 }
 echo '<pre class="brush:php;toolbar:false">';
 print_r($earr);
 return array();
}
Copy after login

对于php错误, 我们一定要认识清楚, 类型分几种, 什么时候触发, 返回值是什么.

如果不区分警告, 错误, 建议,提示等细类型种类, 那我们可以理解php错误类型共有两种:

   一种是强制中断程序错误.  如错误, 方法不存在等. 内存不足, 超时

   一种是非中断式错误. 如警告, 提示这些

其中获取中断程序错误需要使用register_shutdown_function函数, 注册一个内存函数, 然后里面取得错误信息, 这种方法仅能获取到首次的错误行, 如多个不存在的函数时, 它只能获取到首次的那个错误. 这其实也有好处, 你修复一个, 它就会移至下一个.

非中断式错误, 如果用:register_shutdown_function, 那会变得异常难操作, 仅仅能获取首次的提示或者警告, 这时我们需要set_error_handler, 每一次触有error level constants, 都会调用错误函数一次, 也就可以在里面获取错误日志.  不过此函数会承接 error_get_last 函数, 所以你会发现error_get_last返回为空, 全部由参数传入了.

两个函数一起运用, 即可获取到程序的99%的错误, 这对于php程序来说, 算是雪中送打火机了.

试试运行上面的示例吧.

通过代码和文字相结合对PHP中错误日志的获取方法的整理,希望对大家在今后的工作中遇到此类问题有所帮助。

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