PHP intercepts fatal error instance
How does PHP intercept fatal errors? This article mainly introduces examples of using the register_shutdown_function function to intercept fatal errors in PHP. I hope to be helpful.
When we are working on projects, fatal errors occasionally occur due to carelessness. If display_errors is set to off, the user will see a blank page. If it is set to on, the fatal error information will be displayed (of course, normal people will not do this).
So is there any way we can intercept the fatal error in advance and feedback it to the user in our own custom friendly form? There is a function in PHP called register_shutdown_function that allows us to set another function that can be called when the execution is shut down. That is to say, when our script execution is completed or unexpectedly dies and the PHP execution is about to shut down, this function will is called.
Please see an example below:
<?php $flag = false; function deal_error(){ global $flag; if (!$flag){ die("粗问题啦,请稍后再试"); } return false; } register_shutdown_function("deal_error"); //将因为致命错误而失败 //$obj = new NotExistClass(); //引入未定义的类 require('./test.php'); $flag = true;
We set the flag to false at the program entry, and finally set it to true, indicating that the program is executed normally. If the flag is not true at the end, it means it died somewhere in the middle. At this time, register_shutdown_function will be called to output our customized error result.
If the above class is not defined, non-existent files are introduced (require or require_once must be used), etc., it will lead to fatal errors. Of course, if your program is missing a punctuation mark or has an extra special character or something, then there is nothing you can do.
Related recommendations:
php Detailed explanation of error types and shielding methods
php Detailed explanation of error handling mechanism examples
php Error message configuration
The above is the detailed content of PHP intercepts fatal error instance. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
