Question 244897 in PHP Question posted in
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Php – Multidimensional array_search combined with array_column not returning expected result

I´ve isolated a problem I´m having in a complex code and was able to replicate the issue. Let´s say I have the following array:

$categoriesFiltersGenericCheck[2] = [
    'id' => 2214,
    'sort_order' => '0.000000000000000000000000000000',
    'date_creation' => '2023-09-10 11:17:41',
    'date_edit' => '2023-09-10 11:17:41',
    'id_filters_generic' => 2054,
    'id_filter_index' => 101,
    'id_record' => 2212,
    'notes' => '',
];

Then, I use array_search to grab the array key in which the search matches:

$categoriesFiltersGenericCheckKeyMatch = array_search(2054, array_column($categoriesFiltersGenericCheck, 'id_filters_generic'));

I´m expecting to get 2 as a result. However, it´s returning 0

Demo: https://onlinephp.io/c/967b9b

Anyone knows what I might be missing? I´ve done this same pattern in other parts of my code and worked, strangely enough.

Configuration:
PHP 8.0.16

Tags:

2

Answers


  1. 0

    array_column($categoriesFiltersGenericCheck, 'id_filters_generic') returns this:

    array(1) {
  [0]=>
  int(2054)
}

    Note that the key is lost (which is expected behavior). So naturally array_search() will return 0.

    A simple and efficient working implementation is this:

    function search($arr, $id)
{
    foreach($arr as $key => $val)
    {
        if($val['id_filters_generic'] == $id)
            return $key;
    }
    return null;
}

echo search($categoriesFiltersGenericCheck, 2054);
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  2. 0 
    $categoriesFiltersGenericCheck[2] = [
  'id'                 => 2214,
  'sort_order'         => '0.000000000000000000000000000000',
  'date_creation'      => '2023-09-10 11:17:41',
  'date_edit'          => '2023-09-10 11:17:41',
  'id_filters_generic' => 2054,
  'id_filter_index'    => 101,
  'id_record'          => 2212,
  'notes'              => '',
];

$categoriesFiltersGenericCheckKeyMatch =
  array_key_first(
    array_filter(
      $categoriesFiltersGenericCheck,
      fn($item) => $item['id_filters_generic'] === 2054
    )
  );

echo $categoriesFiltersGenericCheckKeyMatch;   // Output: 2

    $categoriesFiltersGenericCheckKeyMatch will be null should the filter condition evaluate to false for all entries.

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