Are there any best practices or coding guidelines to follow when working with header modifications in PHP scripts?

When working with header modifications in PHP scripts, it is important to ensure that headers are set before any output is sent to the browser. This can be achieved by using the `header()` function before any HTML content or whitespace. It is also recommended to use the `header_remove()` function to clear any existing headers before setting new ones to avoid conflicts. 

<?php
// Clear existing headers
header_remove();

// Set new headers
header("Content-Type: application/json");
header("Cache-Control: no-cache");

// Output JSON data
echo json_encode(['key' => 'value']);

Keywords

header function HTTP headers security output buffering content-type

Related Questions