What are the potential pitfalls of using PHP to implement a reload feature for images?

One potential pitfall of using PHP to implement a reload feature for images is that it may cause unnecessary server load if the images are reloaded too frequently. To solve this issue, you can implement a caching mechanism to store the images locally and only reload them when necessary. 

<?php
$cache_time = 3600; // Cache images for 1 hour
$image_path = 'path/to/image.jpg';
$cache_file = 'cached_image.jpg';

if (file_exists($cache_file) && (time() - filemtime($cache_file) < $cache_time)) {
    $image = $cache_file;
} else {
    $image = $image_path;
    copy($image_path, $cache_file);
}

header('Content-Type: image/jpeg');
readfile($image);
?>

Keywords

PHP image reloading caching memory management performance optimization

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