How can I convert PNG images to JPG with compression in PHP while preserving quality and minimizing file size?

Converting PNG to JPG with Compression in PHP

Question:

Seeking a method to convert PNG images to JPG in PHP while preserving quality and minimizing file size. How can this be achieved?

Answer:

PHP provides an image manipulation library that allows for easy conversion between image formats. Here's how to convert a PNG file to JPG with compression:

<code class="php">// Convert PNG image to JPG with transparency in white
$image = imagecreatefrompng($filePath);
$bg = imagecreatetruecolor(imagesx($image), imagesy($image));
imagefill($bg, 0, 0, imagecolorallocate($bg, 255, 255, 255));
imagealphablending($bg, TRUE);
imagecopy($bg, $image, 0, 0, 0, 0, imagesx($image), imagesy($image));
imagedestroy($image);

// Set compression quality (0=worst, 100=best)
$quality = 50;

// Convert to JPG and save to new file
imagejpeg($bg, $filePath . ".jpg", $quality);
imagedestroy($bg);</code>

This code:

1. Loads the PNG image.
2. Creates a new image with a white background and transparent pixels.
3. Copies the PNG image onto the white background.
4. Specifies the compression quality for the JPG output.
5. Converts to JPG and saves the result.

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