In the ".ebextensions" folder create a config file or add to your existing config file. In this example the config file is called "project.config" (the name doesn't actually matter)
Add the following to it:
files:
"/etc/php.d/project.ini" :
mode: "000644"
owner: root
group: root
content: |
upload_max_filesize = 64M
post_max_size = 64M
Note you must uses spaces not tabs in this file
Feel free to comment if you can add help to this page or point out issues and solutions you have found. I do not provide support on this site, if you need help with a problem head over to stack overflow.