What are the potential pitfalls of relying on browser cache for image loading in PHP applications?

Relying solely on browser cache for image loading in PHP applications can lead to outdated or incorrect images being displayed to users if the cache is not properly managed. To ensure that users always see the most up-to-date images, it is important to set proper cache headers and versioning for images in PHP. 

// Set cache headers for images in PHP
header("Cache-Control: no-cache, must-revalidate");
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");

// Add versioning to image URLs to force cache busting
$imageUrl = 'image.jpg?v=' . filemtime('image.jpg');
echo '<img src="' . $imageUrl . '" alt="Image">';

Keywords

browser cache image loading PHP applications performance caching

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