Not unless that PHP file loads Joomla, loads CB, then runs whatever string that needs substitutions through substitution API. You could try using CB Auto Actions and its Code action with Method set to PHP instead of using an external file.
Kyle (Krileon)
Community Builder Team Member
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If you are a Professional, Developer, or CB Paid Subscriptions subscriber and have a support issue please always post in your respective support forums for best results!
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