How can the use of headers in PHP affect the output of image files?

When headers are not set correctly in PHP, it can affect the output of image files by causing them to be corrupted or not displayed properly in the browser. To solve this issue, you need to make sure that the correct content-type header is set before outputting the image file. 

<?php
// Set the content-type header to specify that the output is an image
header('Content-Type: image/jpeg');

// Output the image file
readfile('image.jpg');
?>

Keywords

PHP headers image files output content-type

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