Face problem during get unique value from foreach loop

Question

I have faced a problem during get unique value in foreach loop.

Following is my array.

Array
(
    [20] => Array
        (
            [0] => Array
                (
                    [id] => 4
                    [category_title] => Specialist Range
                    [parent] => 20
                    [front_active] => 1
                    [category_date] => 2019-05-21 04:04:17
                )

            [1] => Array
                (
                    [id] => 4
                    [category_title] => Specialist Range
                    [parent] => 20
                    [front_active] => 1
                    [category_date] => 2019-05-21 04:04:17
                )

            [2] => Array
                (
                    [id] => 4
                    [category_title] => Specialist Range
                    [parent] => 20
                    [front_active] => 1
                    [category_date] => 2019-05-21 04:04:17
                )

            [3] => Array
                (
                    [id] => 6
                    [category_title] => Cater Foil Rolls
                    [parent] => 20
                    [front_active] => 1
                    [category_date] => 2019-05-21 04:04:24
                )

        )

    [21] => Array
        (
            [8] => Array
                (
                    [id] => 24
                    [category_title] => Specialist Range
                    [parent] => 21
                    [front_active] => 1
                    [category_date] => 2019-05-21 04:07:59
                )

            [9] => Array
                (
                    [id] => 24
                    [category_title] => Specialist Range
                    [parent] => 21
                    [front_active] => 1
                    [category_date] => 2019-05-21 04:07:59
                )



        )


)

I written following script for getting unique value in loop

$catArray = array();
foreach($catagory_list as $key=>$catagory){

        $catArray[$catagory['parent']][$key] = $catagory;
} 
ksort($catArray, SORT_NUMERIC);

foreach ($catArray as $key => $value) {

    if($key == 20 ){ 
        $catName ='local';
    }elseif ($key == 21) {
        $catName ='interstate';
    }elseif ($key == 22) {
        $catName ='wholesale';
    }elseif ($key == 23) {
        $catName ='tst';
    }

    //echo $key;

    foreach(array_unique($value) as $keys => $valuess){
        echo $valuess['category_title'];
        ?>
                <tr class="table_header">
                    <th><?php echo $catName." - ".$valuess['category_title'];?> </th>
                </tr>
    <?php

    }
}

Problem is 20 has 4 category_title but when i used array_unique Cater Foil Rolls category title of first parent array is not display.

Output only display

Specialist Range not showing (Cater Foil Rolls)

Edit your question and tell us what is your expected output? — A l w a y s S u n n y, Jul 05 '19 at 16:15
You've spelt category two different ways - that's not the reason your code doesn't work but its just frustrating to see. — Mark, Jul 05 '19 at 16:21

score 1 · Answer 1 · answered Jul 05 '19 at 16:26

If you are trying to find unique records in this nested array, then I would key your associative array off of the value of "id". If you are only trying to find unique category_title, then I would key off the value of "category_title". In any case I would use the associate array functionality to ensure uniqueness on whatever key you choose. Then you can apply sorting, etc. on the result.

// find first unique records
$result = [];
foreach($parents as $key1=>$child1) {
    foreach($child1 as $key2=>$child2) {
        if(!isset($result[$child2['id']])) {
            $result[$child2['id']] = $child2;
        }
    }
}

// result = # => record

OR:

// find first unique categories
$result = [];
foreach($parents as $key1=>$child1) {
    foreach($child1 as $key2=>$child2) {
        if(!isset($result[$child2['category_title']])) {
            $result[$child2['category_title']] = $child2;
        }
    }
}
// result = category => record

score 0 · Answer 2 · answered Jul 05 '19 at 16:27

0

I'm not convinced that array_unique works on multi-dimensional arrays.

See this question.

answered Jul 05 '19 at 16:27

Mark

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Face problem during get unique value from foreach loop

2 Answers2