With players from both teams surrounding the scorer's table, the referees watched replays of Harris' shot for about two or three minutes before signaling the basket was good.
Seconds earlier, the 76ers (27-28) seemingly had nailed down the victory when Andre Iguodala made the second of two free throws to give them a one-point lead with 1.8 seconds to play.
The Nets (25-32) quickly inbounded the ball to Harris, who bobbled it after bumping with Iguodala and then heaved in the winner from in front of the scorer's table.
Knicks 123, Pacers 119: : Nate Robinson scored a season-high 41 points, including the tiebreaking layup with 26 seconds left, and host New York (24-32) pulled out a game it badly needed against Indiana (24-35), which was missing Mike Dunleavy (injured right knee), T.J. Ford (flu) and All-Star Danny Granger (torn right foot tendon).
Off the court
Wizards:: Star Gilbert Arenas took another step toward a possible return from knee surgery this season by taking part in noncontact drills during practice yesterday.
Injured center Brendan Haywood, working his way back from a torn wrist ligament, also took part in the drills.
Barkley: : Charles Barkley will serve time in jail after pleading guilty to charges of driving drunk in Scottsdale, Ariz.
Barkley, 45, is set to begin a five-day jail sentence on March 21. The Hall of Famer must pay more than $2,000 in fines and attend an alcohol treatment program. Under Arizona law, he'll also be forced to install an ignition interlock device on his vehicles.
After a six-week leave of absence, Barkley resumed his job with TNT last week.
Rockets: : Star Tracy McGrady is having season-ending surgery on his left knee.
McGrady has been bothered all season by soreness and finally said last week that he had decided to have the risky surgery, scheduled for today in Chicago.
The seven-time All-Star was averaging 15.6 points, five assists and 4.4 rebounds.