array_unique deletes all but first value

[cfgcjm]

I've passed data into an array (and i've triple checked to make sure it is in there) and i'm trying to remove the duplicates. The echo is "5-A******" which is incorrect. It should be "5-A*6-B*7-A*7-B*8-A"

 

Diagnosis welcome...

 

My code is as follows:

 

sort($homerooms);
$cleanhr=array_unique($homerooms);

echo $cleanhr[0][0];
echo"*";
echo $cleanhr[1][0];
echo"*";
echo $cleanhr[2][0];
echo"*";
echo $cleanhr[3][0];
echo"*";
echo $cleanhr[4][0];
echo"*";
echo $cleanhr[5][0];
echo"*";
echo $cleanhr[6][0];

[genericnumber1]

Can you show us what's in your array? Maybe a print_r() or a var_dump() of it? How you're doing it now looks like it's a multidimensional array, but it's hard for us to judge what you're doing wrong if we don't know the data you're trying to manipulate

[ohdang888]

^^ ah beat me to it.

 

do this before and after you clean it

 

 

print_r($homerooms);

 

and copy and paste what you get

[cfgcjm]

Array ( [0] => Array ( [0] => 5-A ) [1] => Array ( [0] => 6-B ) [2] => Array ( [0] => 6-B ) [3] => Array ( [0] => 7-A ) [4] => Array ( [0] => 7-B ) [5] => Array ( [0] => 8-A ) )

 

 

and you're right it is coded as multi-dimensional however only one dimension is being used

[DarkWater]

Try $cleanhr[0][0], $cleanhr[0][1], $cleanhr[0][2], etc.  Based on your array dump, it should work.

 

EDIT: Okay yeah, that DID post strange then.  Try what I just said, but now I'm thinking that it won't work.  Give it a shot anyway.

[cfgcjm]

That posted strange

 

Array ( [0] => Array ( [0] => 5-A ) [1] => Array ( [0] => 6-B ) [2] => Array ( [0] => 6-B ) [3] => Array ( [0] => 7-A ) [4] => Array ( [0] => 7-B ) [5] => Array ( [0] => 8-A ) )

 

 

[lemmin]

sort($homerooms[0]);
$cleanhr=array_unique($homerooms[0]);

If you don't have the

[0]

you are only checking a list of 1 array which does nothing.

[cfgcjm]

Changed it to

 

sort($homerooms[0]);
$cleanhr=array_unique($homerooms[0]);

echo $cleanhr[0][0];
echo"*";
echo $cleanhr[1][0];
echo"*";
echo $cleanhr[2][0];
echo"*";
echo $cleanhr[3][0];
echo"*";
echo $cleanhr[4][0];
echo"*";
echo $cleanhr[5][0];
echo"*";
echo $cleanhr[6][0];

 

and it now gave me "6******"...odd

[ohdang888]

echo $cleanhr[0][0];

echo"*";

echo $cleanhr[0][1];

echo"*";

echo $cleanhr[0][2];

echo"*";

echo $cleanhr[0][3];

echo"*";

echo $cleanhr[0][4];

echo"*";

echo $cleanhr[0][5];

echo"*";

echo $cleanhr[0][6];

[cfgcjm]

"6*-*B****"

[cfgcjm]

I got it!

 

The second dimension in the array seemed to be screwing it up.

 

I went back into it and completely removed the second dimension from existence. Now i've got 5-A*6-B**7-A*7-B*8-A*

 

which is correct.

[lemmin]

That is because there wasn't a second dimension in the array after you set the variable equal to only one of the dimensions.

[.josh]

That is because there wasn't a second dimension in the array after you set the variable equal to only one of the dimensions.

Umm, where did he do that? It didn't work because the way array_unique works is it removes duplicates inside a single level array, but the values were inside separate arrays (which is inside a master array).  

[lemmin]

Right here:

$cleanhr=array_unique($homerooms[0]);

[.josh]

Well he was supposed to do that because it's a 2d array.  It's a 2d array with only 1 position for the first dimension.

[lemmin]

I know, I told him to do it. I was just explaining why he got the error message.

[.josh]

Oh okay I didn't read that far back, sorry.