How can PHP developers prevent header-related errors when deploying projects to a web server?

PHP developers can prevent header-related errors when deploying projects to a web server by ensuring that no output is sent to the browser before calling the header() function. This can be achieved by placing the header() function at the beginning of the PHP script, before any HTML or whitespace. Additionally, developers should check for any whitespace or characters outside the PHP tags that may be causing output before the headers are sent. 

<?php
ob_start(); // Start output buffering

// Place header function at the beginning of the script
header('Content-Type: text/html');

// Rest of the PHP code goes here

ob_end_flush(); // Flush output buffer
?>

Keywords

header errors deployment web server PHP developers

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