[php] Extract a single (unsigned) integer from a string

I do not own the credit for this, but I just have to share it. This regex will get numbers from a string, including decimal points/places, as well as commas:

/((?:[0-9]+,)*[0-9]+(?:\.[0-9]+)?)/

Cited from here:
php - regex - how to extract a number with decimal (dot and comma) from a string (e.g. 1,120.01)?

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