PHP:

• CheckWkt
• EnumerateCategories
• EnumerateCoordinateSystems
• ConvertWktToCoordinateSystemCode
• ConvertCoordinateSystemCodeToWkt
• ConvertWktToEpsgCode
• ConvertEpsgCodeToWkt
• GetBaseLibrary
• IsValid

HTTP:

• EnumerateCategories
• EnumerateCoordinateSystems
• ConvertWktToCoordinateSystemCode
• ConvertCoordinateSystemCodeToWkt
• ConvertWktToEpsgCode
• ConvertEpsgCodeToWkt
• GetBaseLibrary
• IsValid
• TransformCoordinates