How can PHP developers ensure that the "header" function is used effectively and efficiently in their code?

PHP developers can ensure that the "header" function is used effectively and efficiently in their code by making sure that it is called before any output is sent to the browser. This means that there should be no HTML, text, or whitespace before the "header" function is called. Additionally, developers should ensure that the headers being set are valid and necessary for the functionality of the application. 

<?php
// Ensure that "header" function is called before any output
ob_start(); // Start output buffering
header("Location: https://www.example.com");
ob_end_flush(); // Flush output buffer
exit; // Stop script execution
?>

Keywords

PHP header function HTTP headers caching optimization

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