Enqueueing common php scripts in a plugin

  1. No, it just means it’s used by many plugins, not that Core includes it.
  2. Many of the functions in that library seem to use the JsonLdProcessor class that is also in that library, I’d check for that before including:

 

if ( ! class_exists( 'JsonLdProcessor' ) ) {
    require_once( 'jsonld.php' )
}

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