What are the differences between compressing JPEG and GIF images using PHP, and how does it affect file size reduction?

When compressing JPEG images in PHP, you can use the `imagejpeg()` function with a specified quality parameter to reduce the file size while maintaining image quality. On the other hand, when compressing GIF images, you can use the `imagegif()` function with a specified compression level to achieve a similar result. The choice between JPEG and GIF compression depends on the type of image and the desired level of compression. 

// Compress JPEG image
$source = imagecreatefromjpeg('input.jpg');
imagejpeg($source, 'output.jpg', 80); // 80 is the quality parameter (0-100)

// Compress GIF image
$source = imagecreatefromgif('input.gif');
imagegif($source, 'output.gif', 9); // 9 is the compression level (0-9)

Keywords

JPEG GIF image compression PHP functions file size reduction

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