Display of alternative dates of birth

[alfredo50]

Hello,
I have the following problem:
in a very large family tree with approx. 200,000 births, the baptism data (date and place) are entered in the mass. The births usually only contain the date.
As a result, the place of birth is missing in the result of the person search (attachment), but this is important for further selection.
After a few tests, I discovered that if the data content “date of birth” is missing, the alternative birth data (baptism data) is displayed. I would like to change the search.php file so that if the “Place of birth” data field is empty, the alternative data and therefore the date and place of baptism are displayed.
As my php knowledge is only very rudimentary, please help me to find out which passages in search.php need to be changed, or is there already a modification that can be downloaded.

Many thanks and best regards
Alfred Hilbig