When working with image manipulation in PHP, what are the best practices for handling color allocation and replacement to ensure smooth execution and desired results?

When working with image manipulation in PHP, it is important to handle color allocation and replacement efficiently to ensure smooth execution and desired results. One way to achieve this is by using the imagecolorallocate() function to allocate colors in an image and imagecolorset() function to replace colors. By properly managing color allocation and replacement, you can enhance the quality of your image manipulation tasks.

// Allocate a color in an image
$image = imagecreatefromjpeg('image.jpg');
$color = imagecolorallocate($image, 255, 0, 0); // Allocate red color

// Replace a color in an image
$replaceColor = imagecolorallocate($image, 0, 255, 0); // Allocate green color
imagecolorset($image, $color, 0, 255, 0); // Replace red color with green color

// Output or save the modified image
imagejpeg($image, 'modified_image.jpg');

// Free up memory
imagedestroy($image);