What is the maximum file size that can be uploaded using PHP without an FTP client?

When uploading files using PHP without an FTP client, the maximum file size that can be uploaded is limited by the server's configuration settings. One common setting that affects file upload size is `upload_max_filesize` in the php.ini file. To increase the maximum file size that can be uploaded, you can adjust this setting in the php.ini file or use the `ini_set` function in your PHP script.

// Set the maximum file size that can be uploaded to 20MB
ini_set('upload_max_filesize', '20M');