Hi Sean,
You are in the right place, welcome!
Same procedure will apply. You have to be prepared. Gather all your bank statements, your proof of income, proof of your relationship, your living accommodation and the likes. If you want them to be with you, you need to present these evidences in applying a visa. In your case, as you are not yet wed, you will have to apply FIANCE visa which is valid up to 6mos only or go back to the Philippines and ask the mother of your daughter to marry you (only if you are ready to commit and only if she wanted to be with you in the UK and that you are inlove with each other) then apply for SPOUSE VISA (valid for 2yrs). The choice is yours and your lady love.
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Cheers!