As Wordpress doesn't handle backwards compatibility very well, a sudden move from PHP5 to PHP7 can cause lots of errors. This is due to depreciated code that has been removed with no way of ignoring it if it cannot be run and only run code that works depending on the result of any test for it being available.
This is why I had to create 2 versions of the 5 star Strictly AutoTags plugin. WordPress doesn't let you host premium plugins when they should be helping coders out in reality, especially as they let theme developers charge for themes. However as they don't allow this I have made a free and premium version of the Strictly AutoTags plugin for both PHP5 users and PHP 7 users when the regular expression modifier /e was removed from PHP7.
You can read more about my WordPress plugins over at my WordPress plugins page. Or just download the relevant AutoTag plugin from the list below. However I do suggest reading up about the plugin and it's features first before installation.
- Strictly AutoTags 3.0.3 PHP 5 (£)
- Strictly AutoTags 3.0.5 PHP 7 (£)
- Strictly AutoTags 3.0.2 PHP 5
- Strictly AutoTags 3.0.4 PHP 7
So either download the relevant plugin or read some more info about my Strictly AuotTags plugin here, used by over 250,000 people (on my last count on WordPress's site, which was some time ago.