How can I get the unique value of an array's specific index?

Question

Here is my sample array

And I want to happen is that to get only the unique value of "color"

echo '<select>';
    foreach($store as $item){
        echo '<option>'.$item['color'].'</option>';
    }
    echo '</select>';

And here's I want to display it..

my problem is I don't want to display the same colors all over again.., — Sui Go
– Sui Go, Commented Oct 16, 2012 at 6:32

cetver · Accepted Answer · 2012-10-16 06:37:10Z

2

<?php
$items = Array
(
    Array
    (
        'size' => '7.5 D(M) US',
        'price' => '$49.99',
        'color' => 'Black Grey',
    ),
    Array
    (
        'size' => '8 D(M) US',
        'price' => '$46.90',
        'color' => 'Black'
    )
);


$colors = array();
foreach ($items as $item) {
    $colors[] = $item['color'];
}
$colors = array_unique($colors);
var_dump($colors);

answered Oct 16, 2012 at 6:37

cetver

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Comments

Ravi Kant Mishra · Accepted Answer · 2012-10-16 06:40:33Z

1

I know its not the best but you can use this. By doing like this you can avoid multiple loops.

echo '<select>';
$arr = array()
foreach($store as $item){ 
    if(!in_array($item['color'],$arr)){
       echo '<option>'.$item['color'].'</option>';
    }
    array_push($arr, $item['color']);
}
echo '</select>';

answered Oct 16, 2012 at 6:40

Ravi Kant Mishra

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Comments

air4x · Accepted Answer · 2012-10-16 06:45:24Z

1

Try this

$unique_colors = array_reduce(
  $your_arr, 
  function($res, $elem) { 
    if (!in_array($elem['color'], $res)) {
      $res[] = $elem['color'];
    }
    return $res; 
  }, 
  array()
);

answered Oct 16, 2012 at 6:45

air4x

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Comments

RDK · Accepted Answer · 2012-10-16 06:46:56Z

1

Try to use this small solution:

$Row = Array
(
    [0] => Array
        (
            [size] => 7.5 D(M) US
            [price] => $49.99
            [color] => Black Grey
        )

    [1] => Array
        (
            [size] => 8 D(M) US
            [price] => $46.90
            [color] => Black
        )
);
$color = array();
foreach ($Row as $key => $value) {
    $Color = $value['color'];
    if(!in_array($Color, $color)) $color[] = $Color;
}

answered Oct 16, 2012 at 6:46

RDK

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Comments

Alessandro Minoccheri · Accepted Answer · 2012-10-16 06:40:32Z

0

I have made a simple example

$color=array();
$color2=array();
 foreach($store as $item){
        array_push($color,$item['color']);
    }

    $color2=array_unique($color);
    echo '<select>';
    foreach($color2 as $col){
        echo '<option>'.$col.'</option>';
    }
    echo '</select>';

?>

answered Oct 16, 2012 at 6:40

Alessandro Minoccheri

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