What is the typical maximum file size limit for uploading images in PHP and how can this be adjusted?

When uploading images in PHP, the typical maximum file size limit is determined by the `upload_max_filesize` directive in the php.ini file. To adjust this limit, you can modify the `upload_max_filesize` value in the php.ini file or override it in your PHP script using the `ini_set()` function.

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