What are the implications of browser caching on PHP scripts that generate and serve images, and how can this impact the consistency of the displayed and saved images?

Browser caching can lead to consistency issues with dynamically generated images served by PHP scripts. To ensure that the latest version of the image is always displayed, you can append a query string parameter with a unique value to the image URL. This will force the browser to fetch the updated image instead of using the cached version. 

<?php
$imagePath = 'path/to/image.jpg';
$uniqueParam = time(); // Generate a unique timestamp
$imageUrl = $imagePath . '?v=' . $uniqueParam;
echo '<img src="' . $imageUrl . '" alt="Image">';
?>

Keywords

browser caching PHP scripts images consistency displayed images saved images

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