It’s easy, just config the php.ini. But there is four setting we need to check:
For example in .htaccess:
php_value max_execution_time 1000
php_value max_input_time 1000
php_value post_max_size 100M
php_value upload_max_filesize 100M
If you set upload_max_filesize 100M but leave post_max_size 50M, you will only allow to upload 50M. That is a place we need to notice.
More check here: How to upload big files