Well Philippine Immigration might ask a letter of invitation from your friend and affidavit of support. Your friend can get an affidavit of support at Phil. embassy here in Qatar. It means she will be responsible for your temporary stay here. You need also to pay travel tax in Tourism at T.M. Kalaw, Mnla. You need a copy of your visa. And the original to be submitted at Doha airport on the day of your arrival. Welcome.