Here's my take on this.
The reason for visiting Canada, to be stated in the application for a visitor visa, could be (1) to visit, or (2) to visit AND get married.
If the applicant uses (1), and subsequently gets married, Canada could feel that you misrepresented your case for a visitor's visa, and look suspiciously at any subsequent applications (such as for permament residency). You don't want this.
If the applicant uses (2), Canada might well refuse the visitor visa for fear that the applicant will want to overstay the visitor visa, to be with spouse.
So, I'd use (2), but I'd make sure to have lots of valid reasons to prove intent to return to the home country: e.g. to clean up affairs, sell house, complete job contract, etc etc. Mention that you intend to apply for permanent residency under the Family category while you are back in the home country.
Or, failing all this, use (1) to get a visitor visa, do not get married in Canada, but rather get married in the Phillipines and apply for (spousal) residency from there.