He also praised Bendtner, along with Moroccan forward Maroune Chamakh, for both getting on the scoresheet.
Bendtner's strike made it five successive matches in which the Gunners have scored in second-half injury-time.
The company has said it would be contacting Bendtner to offer their full support.
Flamini's strike for Arsenal came after Bendtner had chested a cross from Gael Clincy into his path.
Arsenal owed their fifth straight league win to a stoppage time strike by Danish striker Nicklas Bendtner.
It was a goal that was typical Arsenal in creation, with Bendtner's clever flick releasing Abou Diaby.
He tormented Porto with some trademark sleight of foot before providing Bendtner with the easiest of chances.
Andrey Arshavin equalised with a superb volley into the corner before Nicklas Bendtner coolly fired Arsenal in front.
Nicolas Bendtner powered in a header and Cameron Jerome scored late on before Doyle's save sealed the points.
The ball dropped perfectly for Flamini, although how much Bendtner knew about the cross remains open to question.
Bendtner missed a host of chances in the Gunners' 3-1 league victory over Burnley at the Emirates last Saturday.
Nicklas Bendtner scored Arsenal's consolation in the battle of two teams who made Champions League semifinal exits in midweek.
Bendtner met Gary McSheffrey's corner at the near post with a bullet header.
Arsenal's second goal came after Bendtner jumped with PSG keeper Landreau as they both tried to reach a corner.
Bendtner's cool third came from the penalty spot after Kieran Gibbs was tripped by Alex Revell in the box.
Marouane Chamakh slotted an early opener before Bendtner's superb header, then a curling finish, put Arsenal's second-string in command.
"Bendtner will not be available for the start of the season, " stated Wenger.
And it was Arshavin's creativity that unlocked Porto again and set Bendtner up for his second 15 minutes later.
But Fabregas slotted home a late winner from the penalty spot after Bendtner had been fouled by Jamie McCombe.
Danish striker Nicklas Bendtner struck in the third minute of injury time to grab all three points for the Gunners.
In the second half Alex Song curled home to double the lead and substitute Nicklas Bendtner slotted in a third.
Bendtner dragged an angled strike wide before the Tyneside outfit almost punished Wenger's side for not making more of their chances.
And Bendtner was not to be denied a first senior hat-trick when Arsenal were awarded a penalty with only seconds left.
The preamble to Eduardo's goal involved some eye-catching combination play on Arsenal's right wing as Emmanuel Eboue's ambitious backheel released Bendtner.
Arshavin skinned the youngster at the first opportunity and crossed for Bendtner, who could not direct his close-range effort on target.
Arsenal fell behind to a Peter Crouch first-half goal but Nicklas Bendtner equalised and both sides had chances to win it.
Nicklas Bendtner and Robin van Persie grabbed the other goals for the Gunners who will now play Burnley in the fifth round.
Kevin Davies opened the scoring for Bolton in the 26th minute only for Danish striker Nicklas Bendtner to equalize 10 minutes later.
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Cesc Fabregas, Theo Walcott, making a successful return after injury, and Nicklas Bendtner scored in the second half to complete the rout.
Bendtner had appeared marginally uninterested, but that changed during the course of an sparkling 20-minute spell from the Danish forward before half-time.
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