Detailed explanation of the use of php register_shutdown_function function

This article mainly introduces PHPError handlingUsage example of function register_shutdown_function, friends who need it can refer to it

When the program is running online, if you encounter a BUG, ​​don't think about it on the front end Output error message, and at the same time notify developers by email in a timely manner, the register_shutdown_function function can come in handy.

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

Can be called multiple times register_shutdown_function() , 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 unexpectedly dies, causing 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 Parameters can be passed 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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