CODEWITHSUNDEEP
phparraysmultidimensional-array
Sanganabasu
Sanganabasu

Reputation: 927

Remove same indexes in multidimensional array

I have multidimensional array as follows.

array(
    0 => array(
            'id' => '6',
            'name' => 'Looper',
            'language' => 'hindi'), 
    1 => array(
            'id' => '7',
            'name' => 'Rush',
            'language' => 'hindi'),
    2 => array(
            'id' => '6',
            'name' => 'Looper',
            'language' => 'hindi'));

So I would like to remove an array having same values and it should be like as follows.

array(
    0 => array(
            'id' => '6',
            'name' => 'Looper',
            'language' => 'hindi'), 
    1 => array(
            'id' => '7',
            'name' => 'Rush',
            'language' => 'hindi'));

Please help me to get the solution.

Upvotes: 0

Views: 340

Answers (4)

Ryan Harne
Ryan Harne

Reputation: 479

Pass to variable to hold the keys, check using in_array

function assc_array_filter($array, $id)
{
    $keys = array();
    foreach($array as $index => $arr)
    {
        if(in_array($arr[$id], $keys))
        {
            unset($array[$index]);
        }
        else
        {
            $keys[] = $arr[$id];
        }
    }
    return $array;
}

call function as

print_r(assc_array_filter($arr, 'id'));



----UPDATED: switch using array_search

Above code will return the first in array, not the "second set" found on the array, so.. Added a parameter to allow it to update the "first set" that found..

function assc_array_filter($array, $id, $last_updated = false, $strict = false)
{
    $keys = array();
    foreach($array as $index => $arr)
    {
        if(($in_index = array_search($arr[$id], $keys, $strict)) !== false )
        {
            if($last_updated)
            {
                $array[$in_index] = $arr;
            }
            unset($array[$index]);
        }
        else
        {
            $keys[] = $arr[$id];
        }
    }
    return $array;
}

Call as

print_r(assc_array_filter($arr, 'id', true));

Upvotes: 0

James L.
James L.

Reputation: 4097

$oldarr = array(
    0 => array(
            'id' => '6',
            'name' => 'Looper',
            'language' => 'hindi'), 
    1 => array(
            'id' => '7',
            'name' => 'Rush',
            'language' => 'hindi'),
    2 => array(
            'id' => '6',
            'name' => 'Looper',
            'language' => 'hindi'));

$newarr = array();
foreach( $oldarr as $v ) if( !in_array( $v, $newarr ) ) $newarr[] = $v;
print_r( $newarr );

That will take care of your problem.. as of PHP 4.2, in_array() will take an array as the first parameter. array_unique() will not work for this solution.. from php.net: "Note: Note that array_unique() is not intended to work on multi dimensional arrays."

Upvotes: 0

NullPoiиteя
NullPoiиteя

Reputation: 57322

can use array_unique() for remove duplicate entry from a single multidimensional array in php

Upvotes: 2

itaka
itaka

Reputation: 399

ok, maybe you can try with unset(array[2]), this remove an element from an array http://php.net/manual/en/function.unset.php

Upvotes: 0

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