array_unique problem

[Adamthenewbie]

I have two arrays, for example:

$array1[0]=1;
$array1[1]=2;
$array1[2]=1;
$array1[3]=3;
$array1[4]=4;

$array2[0]='some string 1';
$array2[1]='some string 2';
$array2[2]='some string 3';
$array2[3]='some string 4';
$array2[4]='some string 5';

I want to use array_unique on $array1 so it changes to:

$new_array1=array_unique($array1);

So the results is:

$new_array1[0]=1;
$new_array1[1]=2;
$new_array1[2]=3;
$new_array1[3]=4;

Which is great but I want the second array to still match it (so what ever value was taken out of the first array take it out of the second array too). For example I want the second array to be this:

$new_array2[0]='some string 1';
$new_array2[1]='some string 2';
$new_array2[2]='some string 4';
$new_array2[3]='some string 5';

Is there an easy way to do this?

[NogDog]

Like this? (Note that array_unique() maintains the keys.)

<pre><?php
$array1[0]=1;
$array1[1]=2;
$array1[2]=1;
$array1[3]=3;
$array1[4]=4;

$array2[0]='some string 1';
$array2[1]='some string 2';
$array2[2]='some string 3';
$array2[3]='some string 4';
$array2[4]='some string 5';

$arr1 = array_unique($array1);
print_r($arr1);

$arr2 = array_intersect_key($array2, $arr1);
print_r($arr2);
?></pre>

Output:

Array
(
    [0] => 1
    [1] => 2
    [3] => 3
    [4] => 4
)
Array
(
    [0] => some string 1
    [1] => some string 2
    [3] => some string 4
    [4] => some string 5
)

[Adamthenewbie]

NogDog;10969359 wrote:

Like this? (Note that array_unique() maintains the keys.)

<pre><?php
$array1[0]=1;
$array1[1]=2;
$array1[2]=1;
$array1[3]=3;
$array1[4]=4;

$array2[0]='some string 1';
$array2[1]='some string 2';
$array2[2]='some string 3';
$array2[3]='some string 4';
$array2[4]='some string 5';

$arr1 = array_unique($array1);
print_r($arr1);

$arr2 = array_intersect_key($array2, $arr1);
print_r($arr2);
?></pre>

Output:

Array
(
    [0] => 1
    [1] => 2
    [3] => 3
    [4] => 4
)
Array
(
    [0] => some string 1
    [1] => some string 2
    [3] => some string 4
    [4] => some string 5
)

Thanks so much that should do the trick!