Why Should You Use `exit;` After `header('Location: ...')` in PHP?

Understanding the Importance of Exit After Location Header in PHP

When redirecting users in PHP, the header function is commonly utilized. It's also recommended to follow this header call with an exit; statement to avoid other PHP code from executing. However, the question arises: can the code following the header-location call be potentially executed?

Execution of Code After Header-Location

Yes, the code after the header-location call can indeed be executed. The header is merely a request to the browser to facilitate redirection. PHP continues to process and serve the remaining page, which a client can access by preventing the execution of the header command.

Bypass Mechanisms

Command-line clients like wget provide a straightforward method to bypass the header redirect. By instructing these clients not to follow redirects, the body of the page, even after the header call, becomes accessible to the client without any specialized hacking techniques.

Conclusion

In light of these factors, it's crucial to acknowledge that PHP will transmit the entire body, including code after a header call, if it's not explicitly prevented. This body can be readily accessed by the recipient without requiring extraordinary technical proficiency.

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