As visa requirements can change, it's crucial to check with the official government sources or the nearest Philippine embassy or consulate for the most up-to-date information. As of my last knowledge update in January 2022, here are the general visa requirements for travelers to the Philippines:

Visa-Free Entry: Citizens of certain countries are allowed visa-free entry to the Philippines for a specified duration. The length of stay and conditions vary. Examples include citizens of the United States, the United Kingdom, Australia, Canada, and most European Union countries.

Balikbayan Program: The Balikbayan Program allows former Filipino citizens, as well as their family members, to stay in the Philippines for one year visa-free.

Tourist Visa: Travelers from countries not covered by visa-free arrangements can apply for a tourist visa. This typically allows for stays of 30 to 59 days, with the option to extend while in the country.

Special Visas: There are special visas available for specific purposes, such as the Special Non-Immigrant Visa for certain investors, the Special Resident Retiree's Visa (SRRV) for retirees, and the Special Work Permit for certain work-related activities.

Entry Requirements:

Passport: Ensure that your passport is valid for at least six months beyond your intended stay.
Onward Ticket: In some cases, you may be required to show proof of an onward or return ticket.
Sufficient Funds: Be prepared to provide evidence of sufficient funds to cover your stay in the Philippines.

Visa Extensions: Tourist visas can typically be extended for a longer stay. Extensions can be obtained through the Bureau of Immigration in the Philippines.

Visa Upon Arrival: Some nationalities are eligible for a visa upon arrival, which allows for a stay of 30 days. This option is available at certain international airports and seaports. It's important to note that immigration policies are subject to change, and visa requirements may vary based on the purpose of the visit, the nationality of the traveler, and the intended length of stay. Travelers should always check with the nearest Philippine embassy or consulate or refer to the official website of the Philippine Bureau of Immigration for the most current and accurate information before planning their trip.