What is the function of the exit function in PHP?

In PHP, the exit() function is used to terminate the current script execution and optionally provide a message as an optional parameter. Its purpose includes:

1. Immediately stop script execution: The PHP script will terminate immediately when the exit() function is called, and any subsequent code will not be executed.
2. Return the specified status code: You can indicate the exit status of a script by passing an integer value to the exit() function. Typically, 0 indicates success, while a non-zero value indicates an error or exceptional state.
3. Output a message: You can pass a string parameter to the exit() function to output a custom message, making it the final output.

Using the exit() function can help you control the flow of script execution and terminate the script when necessary. It is important to be cautious with the excessive use of exit() as it may make the code difficult to debug and maintain.

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