I have a few Magento (CE 1.7.0.2) sites on a VPS server that currently runs MySQL 5.0.9 and PHP 5.3.26
The datacenter company that hosts the VPS wants to upgrade the MySQL and PHP version due to the new requirements of WHM/Cpanel
Will there be any problem if they upgrade to these mysql / php versions?
Best Answer
Of course you can.....
The docs do say that Magento doesn't support newer PHP...
The only issue you'll find that is easily solved happens with a change in the PHP interpreter dealing with Abstract class inheritance enforcement.
There are two files in the Zend library that generate PDFs & Images that need an extra function and parameter added and then its pretty shored up.
Just keep an eye on your logs, the files will jump out when you try to print a shipping label, or invoice.
I've had no problem running Magento on PHP 5.5 with this one consideration. 5.4 - 5.5 has minimal incompatibilities, none of which are found in Magento or associated libraries.
I have two Mage Builds running on my personal server on exactly 5.5 and 5.3.28, works great. One is 1.7.0.2 and one is 1.8