What are some best practices to avoid the error of modifying header information in PHP scripts?

Modifying header information in PHP scripts can lead to errors such as "headers already sent" which can cause issues with the script execution. To avoid this error, it is recommended to ensure that no output is sent to the browser before modifying header information. This can be achieved by placing header functions at the beginning of the script before any output is generated. 

<?php
// Ensure no output is sent to the browser before modifying header information
ob_start();

// Modify header information
header("Content-Type: text/html");

// Output content
echo "Hello, World!";

// Send output to the browser
ob_end_flush();
?>

Keywords

header() output buffering ob_start() ob_end_flush() Content-Type

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