When is the last time the eagles won the superbo?
No context provided
As of  the 2017-18 season, when was the last time the Eagles won the Super Bowl?
February 4, 2017
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As of the 2016-17, when was the last time the Eagles won the Super Bowl?
never
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as of 2015-16 season, when was the last time the Eagles won the Super Bowl?
never
Philadelphia Eagles
https://en.wikipedia.org/wiki/Philadelphia%20Eagles
appeared in four pre-merger NFL Championship Games, winning three of them (1948, 1949, and 1960), and appeared in three Super Bowls, winning Super Bowl LII at the end of the 2017 season.
The Philadelphia Eagles had never won a Super Bowl until they won Super Bowl LII on February 4, 2017.