How to Redirect a PHP Page After Function Execution Using header()?

Redirecting PHP Page After Function Execution

In PHP, it is possible to execute a function and then redirect the user to a different page within the same root folder. This can be achieved using the header() function.

Code Example:

Consider the following PHP code snippet:

if (...) {
    // I am using echo here.
} else if ($_SESSION['qnum'] > 10) { 
    session_destroy();
    echo "Some error occured.";
    // Redirect to "user.php".
    header("Location: user.php"); 
    exit();
}

Explanation:

1. header("Location: user.php");: This line sends a special HTTP header to the browser, instructing it to redirect the user to the specified URL ("user.php").
2. exit();: It is recommended to call exit() after the header() function to prevent any subsequent code from executing and potentially interfering with the redirect process.

Considerations:

• header() must be called before any output is sent to the browser, including HTML tags or blank lines. Failing to do so will result in an error.
• Verify that the redirect code runs before any other output is generated.
• Avoid using echo or other output commands before header(), as it can interfere with the redirect process.

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