SUBTRACT two arrays?

[galvin]

Say I already have the two example arrays below ($arrayA and $arrayB).  What is the proper way to cycle through these arrays to ultimately create a single array ($arrayC) that only has the items that are in Array B but are NOT in Array A?  Basically subtracting the first array from the second array...

 

Array A:

1-dog

2-cat

4-fish

7-monkey

9-bird

 

Array B:

1-dog

2-cat

3-elephant

4-fish

5-whale

6-dolphin

7-monkey

8-aardvark

9-bird

10-stingray

 

So again, I want the end result to be this array...

 

Array C:

3-elephant

5-whale

6-dolphin

8-aardvark

10-stingray

 

Can anyone help?

[WebStyles]

array_diff

[galvin]

Awesome thanks!

[galvin]

Sorry, thought this was working, but something's not right.  Below shows the output of my three arrays.  This is what I am doing to try and get the difference...

 

	$remainingteams = array_diff($allteams, $chosenteams);

 

$allteams...

 

Array ( [0] => Array ( [0] => 1 [teamid] => 1 [1] => Philadelphia [teamcity] => Philadelphia [2] => Eagles [teamname] => Eagles ) [1] => Array ( [0] => 2 [teamid] => 2 [1] => Dallas [teamcity] => Dallas [2] => Cowboys [teamname] => Cowboys ) [2] => Array ( [0] => 3 [teamid] => 3 [1] => New York [teamcity] => New York [2] => Giants [teamname] => Giants ) [3] => Array ( [0] => 4 [teamid] => 4 [1] => Washington [teamcity] => Washington [2] => Redskins [teamname] => Redskins ) [4] => Array ( [0] => 5 [teamid] => 5 [1] => Detroit [teamcity] => Detroit [2] => Lions [teamname] => Lions ) [5] => Array ( [0] => 6 [teamid] => 6 [1] => Minnesota [teamcity] => Minnesota [2] => Vikings [teamname] => Vikings ) [6] => Array ( [0] => 7 [teamid] => 7 [1] => Green Bay [teamcity] => Green Bay [2] => Packers [teamname] => Packers ) [7] => Array ( [0] => 8 [teamid] => 8 [1] => Chicago [teamcity] => Chicago [2] => Bears [teamname] => Bears ) [8] => Array ( [0] => 9 [teamid] => 9 [1] => Tampa Bay [teamcity] => Tampa Bay [2] => Buccs [teamname] => Buccs ) [9] => Array ( [0] => 10 [teamid] => 10 [1] => New Orleans [teamcity] => New Orleans [2] => Saints [teamname] => Saints ) [10] => Array ( [0] => 11 [teamid] => 11 [1] => Carolina [teamcity] => Carolina [2] => Panthers [teamname] => Panthers ) [11] => Array ( [0] => 12 [teamid] => 12 [1] => Atlanta [teamcity] => Atlanta [2] => Falcons [teamname] => Falcons ) [12] => Array ( [0] => 13 [teamid] => 13 [1] => Seattle [teamcity] => Seattle [2] => Seahawks [teamname] => Seahawks ) [13] => Array ( [0] => 14 [teamid] => 14 [1] => San Francisco [teamcity] => San Francisco [2] => 49ers [teamname] => 49ers ) [14] => Array ( [0] => 15 [teamid] => 15 [1] => St. Louis [teamcity] => St. Louis [2] => Rams [teamname] => Rams ) [15] => Array ( [0] => 16 [teamid] => 16 [1] => Arizona [teamcity] => Arizona [2] => Cardinals [teamname] => Cardinals ) [16] => Array ( [0] => 17 [teamid] => 17 [1] => New York [teamcity] => New York [2] => Jets [teamname] => Jets ) [17] => Array ( [0] => 18 [teamid] => 18 [1] => Miami [teamcity] => Miami [2] => Dolphins [teamname] => Dolphins ) [18] => Array ( [0] => 19 [teamid] => 19 [1] => Buffalo [teamcity] => Buffalo [2] => Bills [teamname] => Bills ) [19] => Array ( [0] => 20 [teamid] => 20 [1] => New England [teamcity] => New England [2] => Patriots [teamname] => Patriots ) [20] => Array ( [0] => 21 [teamid] => 21 [1] => Baltimore [teamcity] => Baltimore [2] => Ravens [teamname] => Ravens ) [21] => Array ( [0] => 22 [teamid] => 22 [1] => Cincinnati [teamcity] => Cincinnati [2] => Bengals [teamname] => Bengals ) [22] => Array ( [0] => 23 [teamid] => 23 [1] => Pittsburgh [teamcity] => Pittsburgh [2] => Steelers [teamname] => Steelers ) [23] => Array ( [0] => 24 [teamid] => 24 [1] => Cleveland [teamcity] => Cleveland [2] => Browns [teamname] => Browns ) [24] => Array ( [0] => 25 [teamid] => 25 [1] => Houston [teamcity] => Houston [2] => Texans [teamname] => Texans ) [25] => Array ( [0] => 26 [teamid] => 26 [1] => Tennessee [teamcity] => Tennessee [2] => Titans [teamname] => Titans ) [26] => Array ( [0] => 27 [teamid] => 27 [1] => Jacksonville [teamcity] => Jacksonville [2] => Jaguars [teamname] => Jaguars ) [27] => Array ( [0] => 28 [teamid] => 28 [1] => Indianapolis [teamcity] => Indianapolis [2] => Colts [teamname] => Colts ) [28] => Array ( [0] => 29 [teamid] => 29 [1] => Denver [teamcity] => Denver [2] => Broncos [teamname] => Broncos ) [29] => Array ( [0] => 30 [teamid] => 30 [1] => Kansas City [teamcity] => Kansas City [2] => Chiefs [teamname] => Chiefs ) [30] => Array ( [0] => 31 [teamid] => 31 [1] => Oakland [teamcity] => Oakland [2] => Raiders [teamname] => Raiders ) [31] => Array ( [0] => 32 [teamid] => 32 [1] => San Diego [teamcity] => San Diego [2] => Chargers [teamname] => Chargers ) )

 

 

$chosenteams...

 

Array ( [0] => Array ( [0] => 1 [teamid] => 1 [1] => Philadelphia [teamcity] => Philadelphia [2] => Eagles [teamname] => Eagles ) )

 

$remainingteams... (this should be all teams EXCEPT the Eagles, but it's empty for some reason)

Array ( )

 

Any ideas what I'm doing wrong?

[WebStyles]

well, that's hardly the example you gave in your first post... You had simple arrays, and now you have mulch-dimensional arrays, there's a big difference.

 

 

[galvin]

Sorry, I'm extremely ignorant/inept when it comes to arrays 

 

Can I still do it using array_diff(), or is that function useless with multidimensional arrays?

 

 

[WebStyles]

as the manual says:

This function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using array_diff($array1[0], $array2[0]);.

[galvin]

ok thank you again