How to catch fatal errors in php

How to catch fatal errors in php: You can use the register_shutdown_function() function to catch fatal errors. The register_shutdown_function() function indicates that PHP triggers a certain function behavior at the end of the program.

Use the register_shutdown_function() function to capture fatal errors. This function indicates that PHP triggers a certain function behavior at the end of the program.

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Syntax:

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

Register a callback, which will be executed after the script execution is completed or exit() is called later.

Parameters:

• callback: abort callback to be registered
  

• parameter: can be passed Enter additional parameters to pass the parameters to the abort function

There are four situations when the program ends:

• An error occurred during the execution of the php code

• The php code was executed successfully

• The php code ran timeout

• The page was forced to stop by the user

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Example:

We customize a behavior:

<?php
/**
 * Created by PhpStorm.
 * User: Xavier
 * Date: 2018/6/3
 * Time: 12:16
 */
class RegisterShutDownFunction
{
    /**
     * @author Xavier
     * @desc php 程序运行结束时候需要运行的函数
     */
    public static function register()
    {
        if ($error = error_get_last()) {
            // $filename 必须是一个绝对路径
            if (!defined(&#39;REGISTER_SHUTDOWN_FUNCTION_LOG_FILENAME&#39;)) {
                $filename = dirname(__FILE__) . DIRECTORY_SEPARATOR . &#39;register_shutdown_function.log&#39;;
            } else {
                $filename = REGISTER_SHUTDOWN_FUNCTION_LOG_FILENAME;
            }
            $message = &#39;时间 : &#39; . date(&#39;Y-m-d H:i:s&#39;) . PHP_EOL;
            $message .= &#39;文件 : &#39; . $error[&#39;file&#39;] . PHP_EOL;
            $message .= &#39;行数 : &#39; . $error[&#39;line&#39;] . PHP_EOL;
            $message .= &#39;错误 : &#39; . $error[&#39;message&#39;] . PHP_EOL;
            $message .= &#39;类型 : &#39; . $error[&#39;type&#39;] . PHP_EOL . PHP_EOL;
            file_put_contents($filename, $message, FILE_APPEND);
        }
    }
}

Application:

<?php
/**
 * Created by PhpStorm.
 * User: Xavier
 * Date: 2018/6/3
 * Time: 12:27
 */
 // 定义一个常量来记录程序停止后，出现错误的 LOG 日志文件
define(&#39;REGISTER_SHUTDOWN_FUNCTION_LOG_FILENAME&#39;, dirname(__FILE__) . DIRECTORY_SEPARATOR . &#39;11.log&#39;);
// 包含异常处理的类文件
include &#39;lib/RegisterShutDownFunction.php&#39;;
$registerShutDownFunction = new RegisterShutDownFunction();
// register_shutdown_function 函数必须在所有的程序执行之间注册
register_shutdown_function(array($registerShutDownFunction, &#39;register&#39;));

// 注册成功之后调用一个不存在的方法 aa();
aa();

Error log:

时间 : 2018-06-03 04:56:02
文件 : /Users/x/www/php/exception/2.php
行数 : 17
错误 : Uncaught Error: Call to undefined function aa() in /Users/x/www/php/exception/2.php:17
Stack trace:
#0 {main}
  thrown
类型 : 1

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