CODEWITHSUNDEEP
phparrays
user2376018
user2376018

Reputation:

Unique count of array values

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] => 
)

Upvotes: 0

Views: 147

Answers (5)

Prasanth Bendra
Prasanth Bendra

Reputation: 32740

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
)

Upvotes: 0

rab
rab

Reputation: 4144

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) );

Upvotes: 0

NaveenThally
NaveenThally

Reputation: 1014

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;

Upvotes: 0

Mad Angle
Mad Angle

Reputation: 2330

<?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
?>

Upvotes: 0

Satish Sharma
Satish Sharma

Reputation: 9635

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);

Upvotes: 1

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