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safe to upgrade to PHP 5.4?

Wordpress warned me that I need to upgrade to PHP but I got this warning as well. 

"Upgrading to PHP 5.4 might cause compatibility issues with code on your site.
Installed applications might not run under this new version."


Should I go ahead and upgrade if it screw up will it be okay if I downgrade?


Super User II

Hey there @ndk,


First and always when making updates, take a backup.


Then, go ahead and try to update. If all goes wrong, just load up your backup files.

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