The difference between exit and die in php

exit() and die() are both used to terminate PHP script execution, but with slight differences: Execution order: exit() allows the register_shutdown_function callback to execute, while die() terminates before the script continues execution. Exception handling: exit() triggers an E_ERROR exception, but die() does not. Code readability: exit() more explicitly signals script termination.

The difference between exit() and die() in PHP

Introduction
PHP exit() and die() are both functions used to terminate script execution and display optional messages, but there are some subtle differences between them.

Main difference

• Execution order: die() exits the script before executing other parts of the script, while exit() allows execution Any register_shutdown_function callback.
• Exception handling: die() will not trigger any fatal errors or exceptions, while exit() will trigger an E_ERROR exception.
• Code readability: exit() is considered the more explicit function because its name more directly indicates the termination of the script.

Specific differences

Features	exit()	die( )
Execution order	Allow execution of register_shutdown_function	Exit before executing other parts of the script
Exception handling	Trigger E_ERROR exception	Do not trigger exception
Code readability	More clear	Shorter

Usage scenarios

Usually, exit() is used when script execution needs to end immediately, For example, when a fatal error or exception occurs. Die() is more suitable for use when non-fatal errors occur that need to be logged.

Example

// 使用 exit() 触发 E_ERROR 异常
exit('发生致命错误！');

// 使用 die() 记录非致命错误
if ($condition) {
    die('非致命错误！');
}

Conclusion

exit() and die() are both functions used to terminate script execution. But exit() triggers an exception, allows the register_shutdown_function callback to be executed, and the code is more readable. Choose the appropriate function depending on whether you need to end script execution immediately or log a nonfatal error.

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