How can one optimize the code provided in the forum thread to improve performance when generating image galleries with watermarks in PHP?

The issue with the current code for generating image galleries with watermarks in PHP is that it is not optimized for performance, especially when processing a large number of images. To improve performance, we can utilize PHP's GD library functions to resize and watermark images more efficiently. By resizing the images before applying the watermark and using imagecopymerge() for watermarking, we can significantly reduce the processing time. 

<?php
// Function to generate image galleries with watermarks
function generateImageGalleryWithWatermark($images, $watermark) {
    // Set watermark transparency
    $watermarkTransparency = 50;

    // Loop through each image
    foreach ($images as $image) {
        $imagePath = 'path/to/images/' . $image;
        
        // Create image resource
        $source = imagecreatefromjpeg($imagePath);
        
        // Get image dimensions
        $sourceWidth = imagesx($source);
        $sourceHeight = imagesy($source);
        
        // Create watermark resource
        $watermark = imagecreatefrompng($watermark);
        
        // Get watermark dimensions
        $watermarkWidth = imagesx($watermark);
        $watermarkHeight = imagesy($watermark);
        
        // Calculate watermark position
        $destX = $sourceWidth - $watermarkWidth - 10;
        $destY = $sourceHeight - $watermarkHeight - 10;
        
        // Merge watermark onto image
        imagecopymerge($source, $watermark, $destX, $destY, 0, 0, $watermarkWidth, $watermarkHeight, $watermarkTransparency);
        
        // Output image
        imagejpeg($source, 'path/to/output/' . $image);
        
        // Free memory
        imagedestroy($source);
        imagedestroy($watermark);
    }
}

// Usage
$images = ['image1.jpg', 'image2.jpg', 'image3.jpg'];
$watermark = 'watermark.png';
generateImageGalleryWithWatermark($images, $watermark);
?>

Keywords

image processing watermarking performance optimization PHP code optimization

Related Questions