Glitch Image

function createGlitchImage($sourceImagePath, $glitchLevel = 1.0, $pixelateBlockSize = 10) {
    if (!file_exists($sourceImagePath)) {
        return false;
    }

    // Define cache path
    $cacheDir = './cache/';
    $cachePath = $cacheDir . 'glitch_' . basename($sourceImagePath);

    // If cached version exists, return its path
    if (file_exists($cachePath)) {
        return $cachePath;
    }
    
    if (!is_dir($cacheDir)) {
        mkdir($cacheDir, 0777, true); // 0777 gives full permissions
    }

    // Load the image
    $imageInfo = getimagesize($sourceImagePath);
    $width = $imageInfo[0];
    $height = $imageInfo[1];

    switch ($imageInfo['mime']) {
        case 'image/jpeg':
            $image = imagecreatefromjpeg($sourceImagePath);
            break;
        case 'image/png':
            $image = imagecreatefrompng($sourceImagePath);
            break;
        default:
            return false;
    }

    // Pixelate Effect
    $pixelatedImage = imagescale($image, $width / $pixelateBlockSize, $height / $pixelateBlockSize);
    $pixelatedImage = imagescale($pixelatedImage, $width, $height);

    // Glitch Effect
    for ($y = 0; $y < $height; $y += rand(5, 20)) {
        $shift = rand(-$glitchLevel * 5, $glitchLevel * 5);
        imagecopy($pixelatedImage, $pixelatedImage, $shift, $y, 0, $y, $width - abs($shift), 1);
    }

    // Save to cache
    imagepng($pixelatedImage, $cachePath);
    imagedestroy($image);
    imagedestroy($pixelatedImage);

    return $cachePath;
}

// Usage example
$cachedImagePath = createGlitchImage("cover.jpg", 2.0, 15);
echo "Glitched image stored at: " . $cachedImagePath . '<br>';