Was there some kind of outlawing of Spanish after the Phillipines became independent?
No, the era immediately succeeding the Spanish colonial period was not independence, but the American colonial period. Spanish was never terribly widespread in the Philippines to begin with, the numbers of Spanish colonists arriving in the region were much lower than in Latin America due to distance, and a large percentage of those arriving were missionaries who were more intent on evangelizing in the local languages. The colonial Spanish elite were generally few in number and insulated.
A notable exception to this is parts of the country that were heavily involved with galleon construction where a Spanish creole with simplified grammar survives to this day called chavacano, still spoken by some in Zamboanga and cavite.