==== IMPORTANT ====
Before making ANY changes, remember to back up the php.ini file:
<sxh bash>
cp /etc/php.ini{,.back.$(date +"%Y-%m-%d")}
</sxh>
Note: If the box is using php-fpm you will need to locate the php.ini file for this. 
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Hint: rpm -qc packagename - locates the configuration files for a package
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**upload_max_filesize** is the maximum size of an uploaded file
<sxh bash>
upload_max_filesize = 2M
</sxh>
This value also effects file upload. To upload files this value must be 15% larger than the upload_max_filesize.
<sxh bash>
post_max_size = 8M
</sxh>
== Reload Configuration ==
Once you have made changes to the file you will need to reload apache for them to take effect:

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=== php.ini ===
Php.ini file can be found:
<sxh bash>
vim /etc/php.ini
</sxh>
**memory_limit** is the maximum amount of memory in bytes that a script is allowed to allocate.
<sxh bash>
memory_limit = 128M
</sxh>
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reference: https://www.devside.net/wamp-server/apache-and-php-limits-and-timeouts