Increase the PHP File Upload Limit
By default, XAMPP imposes a 128M limit on files uploaded through PHP. To increase the allowed file size for uploads through PHP, follow these steps:
Edit the php.ini file in the etc/ subdirectory of your XAMPP installation directory (usually, /opt/lampp). Within this file, find the post_max_size and upload_max_filesize variables and change them to reflect the new file upload limit. For example, to restrict uploads to not more than 16M, change these variables as shown below:
; Maximum size of POST data that PHP will accept. ; http://php.net/post-max-size post_max_size=16M ... ; Maximum allowed size for uploaded files. ; http://php.net/upload-max-filesize upload_max_filesize=16M
Save your changes to the file.
Restart the Apache server.
The new file upload limit will now come into effect.