What are the key configurations related to file uploads in PHP that should be checked, such as file_uploads, upload_max_filesize, upload_tmp_dir, post_max_size, and max_input_time?

When working with file uploads in PHP, it's important to ensure that the necessary configurations are set correctly to avoid issues. Key configurations to check include file_uploads (to enable file uploads), upload_max_filesize (to set the maximum file size that can be uploaded), upload_tmp_dir (to specify the temporary directory for file uploads), post_max_size (to limit the total size of POST data), and max_input_time (to set the maximum time in seconds that a script is allowed to parse input data).

// Ensure file uploads are enabled
ini_set('file_uploads', '1');

// Set the maximum file size to 10MB
ini_set('upload_max_filesize', '10M');

// Specify the temporary directory for file uploads
ini_set('upload_tmp_dir', '/tmp');

// Limit the total size of POST data to 20MB
ini_set('post_max_size', '20M');

// Set the maximum time in seconds that a script is allowed to parse input data
ini_set('max_input_time', '60');