The Giants are headed to Philadelphia on Saturday to face the Eagles in a pivotal playoff matchup. They should not expect a friendly welcome.

Philadelphia fans have treated visiting fans with vitriol and anguish for decades. So if you are making the trip to Lincoln Financial Field for Saturday night’s contest, we wish you the best of luck.

Ever hear the saying, “Act like you’ve been there before?” Well, when the Eagles won Super Bowl LII in 2018, they quite literally hadn’t been there before, and it showed. In the moments after the surprising Super Bowl victory, fans went into the city and caused unbelievable amounts of chaos.

Between turning over cars, eating literal horse poop, doing insanely dangerous trust falls and setting the city on fire.

This one is a classic ugly Philadelphia moment. The holiday spirit was not present on Dec. 15, 1968. And the treatment that Santa got just 10 days before Christmas was a special level and was the bar for bad behavior by Philadelphia faithful.

The Post’s Mark Hale discussed the matter with former Jets Coach Herm Edwards back in 2001.

“We were 4-10 the last game of my rookie year, and the fans booed Santa Claus,” said Edwards, who spent nine seasons (1977-85) with the Eagles. “He was throwing presents into the crowd. And they just threw ’em back.”

All of those fans were on the naughty list that year and they may never get off of it.

To be fair, a few rotten eggs should not categorize an entire fanbase. And this case, it was one terrible person that decided to commit this atrocity. But this one is arguably the most harmful and traumatizing moment committed by Philadelphia sports fans.

Matthew Clemmens, 21, was charged with simple assault and harassment while being held on $36,000 bail for intentionally vomiting on an 11-year-old girl. The arresting police officer allegedly saw Clemmens put his fingers down his throat.

There’s a special place for people like that, and it’s apparently called Philadelphia.

The Eagles hosted the team formally known as the Washington Redskins, who had a bizarre mascot known as Chief Zee. He was the unofficial mascot of the team and a super fan. But he had no idea what was coming when he walked into Veterans Stadium in 1983.

Williams was attacked twice. Once inside the stadium where he was assaulted, and his clothes ripped. But the second time proved to be a far more violent attack by the same group of people. Williams broke his leg and was in a wheelchair and crutches for the remainder of the year.

Hopefully, Major Tuddy fares better when he makes his first trip to Philadelphia for the Commanders next season.

With the school located just 12 miles outside of Philadelphia, the Villanova Wildcats were thrilled to win the 2018 men’s basketball NCAA National Championship. But Philadelphia has a very strange way of celebrating. Naturally, fans took to the streets to celebrate, break things and set bushes on fire.

But classes were canceled so that’s a win, right?