How to use the PHP error handling function register_shutdown_function

This article mainly introduces the use examples of the PHP error handling function register_shutdown_function. Friends who need it can refer to it

When the program is running online, if a BUG is encountered, you want not to output error information on the front end, but at the same time Notify developers by email in time, and 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 to obtain error information.

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

callable callback function

parameter can be passed in additional parameters. Parameters passed to the abort function

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()

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