PHP error handling function

When the program is running online, if you encounter a BUG and want to avoid outputting error messages on the front end and notify developers by email in a timely manner, the register_shutdown_function function can be dispatched It comes in handy.

Register a function that will be called after the script execution is completed or after exit().

You can call register_shutdown_function() multiple times, and these registered callbacks will be called sequentially in the order in which they were registered. If you call exit() inside a registered method, all processing will be aborted and other registered abort callbacks will not be called again.

register_shutdown_function Function, when our script execution is completed or unexpected death causes PHP execution to be shut down, our function will be called and can be used in conjunction with error_get_last Use to get error information.

register_shutdown_function ( callable $callback [, mixed $parameter [, mixed $... ]] )

callable callback function

parameter can pass parameters to the abort function by passing in additional parameters.

DEMO1:

//关闭错误报告
error_reporting(0);
//实现自己的错误信息展示
register_shutdown_function(‘myShutdown‘);
$debug = true;
function myShutdown() {
 global $debug;
 // 无论错误是否发生，这句都会执行
 echo ‘ERROR‘ , ‘<br/>‘;
 if (!$debug) {
   $error = error_get_last();
   // todo 可以在这里做邮件发送提醒 或 错误日志收集
   var_export($error);
 }
}

DEMO2:

// 回到函数带参数：记录当前请求URL
$current_page = htmlspecialchars($_SERVER[‘SCRIPT_NAME‘], ENT_QUOTES, ‘UTF-8‘);
$current_page .= $_SERVER[‘QUERY_STRING‘] ? ‘?‘.htmlspecialchars($_SERVER[‘QUERY_STRING‘], ENT_QUOTES, ‘UTF-8‘) : ‘‘;
register_shutdown_function(function ($current_page) {
 //todo send email or log
}, $current_page);
error_get_last() 
//错误信息查看：http://php.net/manual/zh/errorfunc.constants.php

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