How to flip image using php in codeigniter?

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public function flipImage($imagePath) {
    // Load the image
    $image = imagecreatefromjpeg($imagePath);
    
    // Get image width and height
    $width = imagesx($image);
    $height = imagesy($image);
    
    // Create a new image to store the flipped image
    $flippedImage = imagecreatetruecolor($width, $height);
    
    // Flip the image horizontally
    for($x = 0; $x < $width; $x++) {
        imagecopy($flippedImage, $image, $width - $x - 1, 0, $x, 0, 1, $height);
    }
    
    // Save the flipped image
    imagejpeg($flippedImage, $imagePath);
    
    // Free up memory
    imagedestroy($image);
    imagedestroy($flippedImage);
}

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$this->flipImage('path/to/image.jpg');