You did not understand the problem. I do not have problem in "switching PHP version from control panel"
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I have 6 websites with 2000 products at each website and 25+ plugins, and it is not Alidropship plugins. Some of these plugins have PHP 7.1 version, some not.
If I "just switch PHP version" I'll get crashed website.
I need to find PHP 7.1 version of each plugin, install and configure them properly, change ioncube version, change wordpress version, change woocommerce version, configure everything and so on...
Totally upset ...