What are common challenges when trying to output an image on the screen using PHP?

One common challenge when trying to output an image on the screen using PHP is setting the correct content type header to inform the browser that the response is an image. This can be solved by using the header() function in PHP to set the Content-Type header to the appropriate image format (e.g. image/jpeg, image/png). Another challenge is ensuring that the image file path is correct and accessible by the PHP script. 

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

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

Keywords

image processing PHP GD library file permissions image file formats content-type header

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