Why is it important to have a basic understanding of PHP fundamentals before using functions like header()?

It is important to have a basic understanding of PHP fundamentals before using functions like header() because header() is used to send HTTP headers, which must be sent before any actual output from your script. If you try to use header() after output has already been sent, you will encounter an error. Understanding how PHP scripts are executed and the order in which functions should be called will help you avoid common errors related to using header(). 

<?php
// Ensure no output has been sent before using header()
ob_start();

// Use header() after ensuring no output has been sent
header("Location: https://www.example.com");
exit;
?>

Keywords

PHP fundamentals header() functions error types

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