How can PHP variables be used in image paths to ensure the browser always fetches the latest version of the image?

When using PHP variables in image paths, appending a query string with a unique value (such as a timestamp or version number) to the image URL can ensure the browser always fetches the latest version of the image. This forces the browser to bypass its cache and retrieve the image from the server each time. 

<?php
$imageVersion = time(); // Generate a unique value, such as a timestamp
$imagePath = "images/image.jpg?version=" . $imageVersion;
?>

<img src="<?php echo $imagePath; ?>" alt="Image">

Keywords

PHP variables image paths browser caching version control dynamic content

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