How to stop code execution in php

php method to stop code execution: 1. Use the "die()" function to output a message and exit the current script. The syntax is "die(status)"; 2. Use the "exit()" function Exit the current script. This function is an alias of the "die()" function, and its syntax is such as "exit(message)".

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, Dell G3 computer.

php How to stop code execution?

The two functions that stop PHP code execution are die() and exit();

are usually used with error management (strictly speaking, they are language constructs rather than functions , but who cares about that). When die() and exit() are called in a script, the entire script will be terminated. They can all be used to prevent a script from continuing to execute, so that certain important operations (such as establishing a database connection) will not occur.

You can also pass die() and exit() a string that will be printed in the browser.

die() function:

die() function outputs a message and exits the current script.

This function is an alias of the exit() function.

Syntax

die(status)

Parameters

status Required. Specifies the message or status number to be written before exiting the script. Status numbers are not written to the output.

Description

If status is a string, the function will output the string before exiting.

If status is an integer, this value will be used as the exit status. The exit status value is between 0 and 254. Exit status 255 is reserved by PHP and will not be used. Status 0 is used to terminate the program successfully.

exit() function:

exit() function outputs a message and exits the current script.

This function is an alias of the die() function.

Syntax

exit(message)

Parameters

message Required. Specifies the message or status number to be written before exiting the script. Status numbers are not written to the output.

Recommended learning: "PHP Video Tutorial"

The above is the detailed content of How to stop code execution in php. For more information, please follow other related articles on the PHP Chinese website!