You are welcome, and I wasn't meaning to take you to task for not having found the answer in a search (I was just letting you know there is s lot of discussion about the subject on these froums).
This software's search function is a little "less than intuitive". I find the key to finding what I want is to make sure I set the filter to be at least 1 year, and to avoid the ""exact phrase" setting.
In this instance, entering simply "fopen" for the search term would give you more than you want (though it would include the relevant answers) and using "allow_url_fopen" would give you better results. (no quotes in the "search" box).
Did the information in the thread I linked to give you what you needed?