How can caching be implemented to improve performance when processing images in PHP?

Caching can be implemented by storing processed images in a cache directory and checking if the processed image already exists before processing it again. This can significantly improve performance by reducing the processing time for images that have already been processed. 

// Check if the processed image already exists in the cache directory
$cacheDir = 'cache/';
$processedImage = $cacheDir . 'processed_image.jpg';

if (!file_exists($processedImage)) {
    // Process the image here
    // Save the processed image to the cache directory
    copy('original_image.jpg', $processedImage);
}

// Use the processed image
echo '<img src="' . $processedImage . '" />';

Keywords

caching performance images PHP implementation

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