How can the issue of headers already being sent be avoided when working with PHP scripts that involve outputting images?

When working with PHP scripts that involve outputting images, the issue of "headers already sent" can be avoided by ensuring that no output is sent to the browser before setting the headers. This can be achieved by using output buffering functions like ob_start() and ob_end_clean() to capture the output and prevent it from being sent prematurely. 

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

// Your image generation code here

header('Content-Type: image/jpeg'); // Set the appropriate content type

// Output the image
imagejpeg($image);

ob_end_clean(); // Clean the output buffer and prevent any premature output

// Additional PHP code or HTML can be added below
?>

Keywords

output buffering ob_start ob_clean imagepng header_sent

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