What potential pitfalls should be avoided when generating thumbnails for albums in PHP?

One potential pitfall to avoid when generating thumbnails for albums in PHP is not properly handling image file extensions. It is important to check the file extension of the uploaded image to ensure it is a valid image format before generating a thumbnail. This can help prevent security vulnerabilities such as allowing malicious files to be uploaded and executed on the server. 

// Check if the uploaded file is an image
$allowed_extensions = array('jpg', 'jpeg', 'png', 'gif');
$uploaded_extension = pathinfo($_FILES['image']['name'], PATHINFO_EXTENSION);

if (!in_array($uploaded_extension, $allowed_extensions)) {
    // Handle error or reject the file
    echo 'Invalid file format. Please upload a JPG, JPEG, PNG, or GIF file.';
} else {
    // Generate thumbnail for the image
    // Add code to generate thumbnail here
}

Keywords

image processing GD library memory management file permissions image distortion

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