Unique count of array values

Question

I have an array called $countrySelected. I would like to retrieve the total unique count of countries.

E.g, if theres Afghanistan, Aland Islands, and Afghanistan in the array, the unique count would be 2.

Any pointers, or references in the right direction would be appreciated. Do I somehow merge the arrays, and then count the unique values?

Array
(
    [0] => Array
        (
            [0] => Afghanistan
            [1] => Aland Islands
        )

    [1] => Array
        (
            [0] => Aland Islands
            [1] => Albania
            [2] => Algeria
        )

    [2] => Array
        (
            [0] => Albania
            [1] => Algeria
        )

    [3] => 
    [4] => Array
        (
            [0] => Albania
            [1] => Algeria
        )

    [5] => Array
        (
            [0] => Aland Islands
            [1] => Albania
            [2] => Algeria
        )

    [6] => 
    [7] => 
    [8] => 
    [9] => 
    [10] => 
    [11] => Array
        (
            [0] => Afghanistan
        )

    [12] => 
    [13] => 
    [14] => 
    [15] => 
    [16] => 
    [17] => 
    [18] => 
    [19] => Array
        (
            [0] => Albania
            [1] => Algeria
        )

    [20] => 
    [21] => 
    [22] => 
    [23] => 
    [24] => 
    [25] => 
    [26] => 
    [27] => 
    [28] => 
    [29] => 
    [30] => 
    [31] => 
    [32] => 
    [33] => 
    [34] => 
    [35] => 
    [36] => 
    [37] => 
    [38] => 
    [39] => 
    [40] => 
    [41] => 
    [42] => 
    [43] => 
    [44] => 
    [45] => 
    [46] => 
    [47] => 
    [48] => 
    [49] => 
    [50] => 
    [51] => 
    [52] => 
    [53] => 
    [54] => 
    [55] => 
    [56] => 
    [57] => 
    [58] => 
    [59] => 
    [60] => 
    [61] => 
    [62] => 
    [63] => 
    [64] => 
    [65] => 
    [66] => 
    [67] => 
    [68] => 
    [69] => 
    [70] => 
    [71] => 
    [72] => 
    [73] => 
    [74] => 
    [75] => 
    [76] => 
    [77] => 
    [78] => 
    [79] => 
)

Could you repost your array in a form suitable for testing (var_export, not var_dump)? — georg
– georg, Commented Aug 12, 2014 at 9:18

Satish Sharma · Accepted Answer · 2014-08-12 09:11:05Z

1

you can do this

$arr_country = array();

foreach($your_array as $arr)
{
    foreach($arr as $country)
    {
       if(!in_array($country, $arr_country))
       {
         $arr_country[] = $country;
       }
    }   
}

echo "Total Countries : ".count($arr_country);

answered Aug 12, 2014 at 9:11

Satish Sharma

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1 Comment

hindmost Over a year ago

You have to check type of $arr variable since it may be not an array

Mad Angle · Accepted Answer · 2014-08-12 09:18:11Z

0

<?php
    $countries = array();    
    foreach($given_array as $array){
        foreach($array as $country){
            if(!in_array($country, $countries)){
                $countries[] = $country;
            }
        }   
    }    
    echo count($countries); // prints Total Number of countries
?>

answered Aug 12, 2014 at 9:18

Mad Angle

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Comments

NaveenThally · Accepted Answer · 2014-08-12 09:27:39Z

0

You can use built in array function and count to get it for simple array

$ary=array("Af","Bc","Af");
$count=count(array_unique($ary));
echo $count;

for arrays of array use

$countrySelected=array(); 
foreach ($resarray as $tkey=>$tvalue)
{
   if(is_array($tvalue))
     { 

        foreach($tvalue as $finkey=>$finvalue)
       {
          $countryselected[]=$finvalue;

       }
    }
}
$count=count(array_unique($countryselected));
echo $count;

edited Aug 12, 2014 at 9:27

answered Aug 12, 2014 at 9:15

NaveenThally

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1 Comment

mTorres Over a year ago

No you can't, take a look at the input array

rab · Accepted Answer · 2014-08-12 09:34:50Z

0

I have tried with array_reduce, using flip of array keys

$uniques = array_reduce( $countries, function ( $carry, $item){
    return $item ? $carry + array_flip($item) : $carry;
}, array() );

echo count( array_keys( $uniques) );

answered Aug 12, 2014 at 9:34

rab

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Comments

Prasanth Bendra · Accepted Answer · 2014-08-12 10:42:26Z

0

Here is the simple solution : No loops :)

$array  = array(array("Afghanistan", "Aland Islands"), array("Aland Islands", "Albania", "Albania"));

$result = array_count_values(call_user_func_array('array_merge', $array));

echo "<pre>";
print_r($result);

count($result); // will give you the count of unique countries.

Output :

Array
(
    [Afghanistan] => 1
    [Aland Islands] => 2
    [Albania] => 2
)

edited Aug 12, 2014 at 10:42

answered Aug 12, 2014 at 10:36

Prasanth Bendra

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