② As for Packagist I am not a php developer, so the only thing to do is to try and if errors see any dicussions by searching the forums for that , or the php library github repo
And I have an additional quesion that
we have to update PHP version more than v7.3.0 if We would like to use Orders API ??
Because we are developing our application (Web service) by PHP which is v7.2.5
Furthermore using Shopify API which is [ graphql.json ], [ graphql.json ], [ graphql.json ]
I must apologize to ask you a lot of quesions.
If you know anything about useful info for above question, Could please you inform about that
You really need to break problems apart to increase chances the right people see the question with proper titles.
If you think there is an incompatibility requiring to use a higher version , or something is indicating a problem you should provide a reference to that documentation.
Generally if platforms library requires a specific version of PHP to interact with a specific endpoint then yes you have to use a higher version of the language, or should by default try to use the highest version of a software to avoid a lot of headache.
Otherwise you may need to implement your own api in backend language that works with in the target version being used.