If I am running php script that supports 5.3, but the server php is 7+, this can cause problems in the running of the script. What should have to be done in order to add php 7 support to the existing php script, in order for it to function correctly on the server? Thank-You
You will need to update all the out-dated functions, is it throwing errors and warnings? You will also more than likely face security issues, how old is the script?
Run it and wait for it to fall over - once you have each offending function identified do a search for where else you've used it.