find duplicates in php multidimentional array and place them in a new array

Question

I have an array like this.

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [id] => 123
                    [name] => abc
                    [age] => 21

                )

            [1] => Array
                (
                   [id] => 456
                   [name] => abc
                   [age] => 25
                  )
             [2] => Array
                (
                   [id] => 789
                   [name] => ghi
                   [age] => 40
                  )
               )
             )

what i want to do is find any duplicates name in that array and place that in a new array.So finally my array have to be like this.

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [id] => 123
                    [name] => abc
                    [age] => 21

                )

             [1] => Array
                (
                   [id] => 789
                   [name] => ghi
                   [age] => 40
                  )
           )
     [1] => Array
        (
            [0] => Array
                (
                   [id] => 456
                   [name] => abc
                   [age] => 25

           )
         )

             )

I'm struggling on how to do that.can any body pls help me to fix this?

What have you tried? You need to loop over the array (foreach), get each name and compare to all other names using a nested loop. — Joe T
– Joe T, Commented Jul 7, 2014 at 23:07
I'm new to multidimentional array and can loop through the array and can acess values after that how can i process? — devuser
– devuser, Commented Jul 8, 2014 at 0:36

user1978142 · Accepted Answer · 2014-07-08 02:56:59Z

1

You can just use a simple foreach for this, you could just push the duplicate array to the next dimension if it sees one. Example:

$values = array(
    array(
        array('id' => 123, 'name' => 'abc', 'age', 21),
        array('id' => 456, 'name' => 'abc', 'age', 25),
        array('id' => 789, 'name' => 'ghi', 'age', 40),
    ),
);

foreach($values as $batch) {
    $temp = array();
    foreach($batch as $key => $value) {
        if(!isset($temp[$value['name']])) {
            $temp[$value['name']] = $value; // temporary storage
        } else {
            unset($batch[$key]);
            $values[][] = $value; // push it outside this batch
        }
    }
}

echo '<pre>';
print_r($values);

edited Jul 8, 2014 at 2:56

answered Jul 8, 2014 at 1:46

user1978142

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