Andre Miller scored 19 points, Joe Smith had 14 and Steven Hunter 11 for the Sixers, who finished 3-4 on their season-high, seven-game homestand.
Eddy Curry had 22 points and Jamal Crawford 14 for the Knicks, who beat Orlando a night earlier.
Knicks coach Isiah Thomas said before the game that sometimes the schedule, like back-to-backs, beats a team more than the opponent. This one, though, had everything to do with the Sixers.
Mostly, it had to do with Korver. He scored 14 points in the second quarter while the Sixers took a 15-point lead. After the Knicks whittled the lead down to five in the fourth, he sank a pair of 3s that pushed back New York and help Philadelphia snap a three-game losing streak.
Renaldo Balkman scored 13 and Stephon Marbury had 12 points for the Knicks.
Balkman, who was sensational during a big Knicks run in the third, turned a sharp entry pass into a layup underneath, and Crawford sank two free throws that trimmed the lead to 76-71 in the fourth.
Then Korver started another string of big baskets, and didn't seem at all bothered by the turf toe in his left foot and plantar fasciitis in his right that's caused him recent discomfort.
He scored on a driving layup and sank a free throw, then Smith made a 20-footer for a 10-point lead and some needed breathing room.
Marbury converted a three-point play, only to have Korver come right back and drill a 3. Marbury sank a 3-pointer, then Korver did what he does best _ yup, bury another 3.
When he hit his sixth 3-pointer of the game late in the fourth, the Sixers went ahead 97-80 and the Knicks had no more runs left.
Korver was sensational off the bench, going 6-for-7 from 3-point range and 11-of-14 overall. He matched the 31 points he scored at Milwaukee last season.
With Sixers leading scorer Andre Iguodala held without a field goal for most of the first three quarters, the Knicks took advantage and rallied back from a 15-point halftime deficit.
Balkman had a pair of thunderous dunks that got an "ooh!" out of another minuscule crowd. He hit a 3 that cut the gap to 70-63 and Crawford added one earlier during a 19-4 run that helped bring them within seven. New York made 12 of 22 shots in the third.
The Knicks rallied without Quentin Richardson, who was knocked out of the game in the third quarter with a bruised left shoulder.
The Knicks built an 11-point lead before that was wiped out by some torrid shooting. Korver and Louis Williams each hit 3-pointers during a 10-0 run that opened the second quarter and gave them a four-point lead.
Korver's 3 made it 41-29 and the Sixers eventually stretched the lead to 15 points _ a 26-point turnaround from late in the first quarter.
Led by Korver, Sixers reserves scored 32 points in the first half on 13-for-17 shooting. Green made all four of his shots and Korver went 3-for-4 from 3-point range to take a 53-38 lead.
Korver scored 19 points in the first half while Philadelphia's starting five combined for 21. Carney, Samuel Dalembert and Iguodala went a combined 0-for-8.
Notes:@ Knicks F David Lee sat out with the flu. ... Thomas said he didn't see a trade "on the horizon." "We're definitely headed in the right direction," he said. "It's a young group that we have. I like our approach every single night and I don't see a need to disrupt that." ... Sixers coach Maurice Cheeks also said he had no indication the Sixers would make a trade before Thursday's deadline. ... Hunter was in the starting lineup. He was initially expected to be out indefinitely and possibly need surgery on his dislocated left pinky finger before getting a second opinion. ... So how valuable has Curry been to the Knicks? "He's been our best player, but the plyer we can't do without is Marbury," Thomas said.