What are the limitations or thresholds for file size and array size that can trigger MIME type discrepancies in PHP?

When handling file uploads in PHP, there may be instances where the file size or array size exceeds the limits set in the server configuration, causing MIME type discrepancies. To solve this issue, you can adjust the PHP configuration settings for `upload_max_filesize` and `post_max_size` to accommodate larger file sizes and array sizes.

// Adjust PHP configuration settings for file uploads
ini_set('upload_max_filesize', '20M');
ini_set('post_max_size', '25M');