How can PHP configuration settings in php.ini impact file upload limits and how can these settings be adjusted for larger file sizes?

PHP configuration settings in php.ini can impact file upload limits by setting restrictions on the maximum file size that can be uploaded. To adjust these settings for larger file sizes, you can modify the "upload_max_filesize" and "post_max_size" directives in the php.ini file to increase the limits.

; Maximum allowed size for uploaded files.
upload_max_filesize = 20M

; Must be greater than or equal to upload_max_filesize
post_max_size = 20M